Online ISSN
1750-0443
Micro & Nano Letters
Volume 6, Issue 8, August 2011
Volumes & issues:
Volume 6, Issue 8
August 2011
-
- Author(s): M. Rajput ; R.K. Sinha ; S. Rawal ; S.K. Varshney
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 575 –578
- DOI: 10.1049/mnl.2011.0171
- Type: Article
- + Show details - Hide details
-
p.
575
–578
(4)
In this Letter, the authors present a new design of left-handed material structure that can emit UV light via second harmonic generation. It has been shown that negative index can be achieved by excitation of surface polariton waves operating in dispersion regime with anti-parallel refracted wave vector and the Poynting vector. Coupled dipole approximation predicts negative real values of both permeability μ and permittivity ɛ with extremely low imaginary values at visible/UV light. Through 3D FDTD numerical simulations, far-field spectrum and high transmission efficiency >98% can be attained, resulting to high directionality, which favours its potential application as a plasmonic nanoantenna. Influence of structural parameters on transmission and dispersion properties is also investigated in detail that might be useful for imaging applications. - Author(s): Cuiping Kang ; Zhenxing Zhang ; Yongzhe Zhang ; Yongmin He ; Yizhu Xie ; Erqing Xie
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 579 –581
- DOI: 10.1049/mnl.2011.0225
- Type: Article
- + Show details - Hide details
-
p.
579
–581
(3)
A multi-layered film with a TiO2-based nanotubes/nanoparticles/nanotubes sandwich structure has been developed to increase light-harvesting efficiency by enhancing light scattering. Compared to a double-layered film of nanotubes/nanoparticles, the sandwiched film exhibited greatly improved light-absorption properties. An obviously improved total energy-conversion efficiency of 6.11% was obtained in the sandwiched film, which is 27.3, 46.1 and 213% higher than those of the double-layered film, nanoparticle film and nanotube film, respectively. A possible mechanism for the enhancement of light harvesting in the sandwiched film is proposed, whereby the observed enhancement is owing to effective scattering by the bottom layer and reflection of escaped light by the top layer. - Author(s): M.S. Sharif Azadeh ; A. Kokabi ; M. Hosseini ; M. Fardmanesh
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 582 –585
- DOI: 10.1049/mnl.2011.0195
- Type: Article
- + Show details - Hide details
-
p.
582
–585
(4)
A specific structure of doped graphene with substituted silicon impurity is introduced and ab initio density-functional approach is applied for the energy band structure calculation of the proposed structure. Using the band structure calculation for different silicon sites in the host graphene, the effect of silicon concentration and unit cell geometry on the bandgap of the proposed structure is also investigated. Chemically, silicon-doped graphene results in an energy gap as large as 2 eV according to density-functional theory calculations. As the authors will show, in contrast to previous bandgap engineering methods, such structure has significant advantages including wide gap tuning capability and its negligible dependency on lattice geometry. - Author(s): M.H. Korayem ; M. Zakeri ; M.M. Aslzaeem
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 586 –591
- DOI: 10.1049/mnl.2011.0199
- Type: Article
- + Show details - Hide details
-
p.
586
–591
(6)
The dynamic model of the nanoparticles pushing on a substrate based on the atomic force microscope with a rectangular cantilever (RC) and a V-shaped cantilever (VSC), which includes 12 nonlinear and coupled equations, has been analysed, by using the graphical and automatic differential sensitivity analysis (SA) methods, and the sensitive and non-sensitive parameters and their sensitive ranges have been identified. The results indicate that the output variables of manipulation are very sensitive to the cantilever's dimensions. The two parameters, length and thickness of cantilever, are very sensitive, which the results of the graphic SA confirm. In addition, the results of the graphic SA show that the degree of sensitivity depends on the apparent values of input parameters, such that by changing the magnitude of a specific parameter, it could be possible to increase or decrease the sensitivity. Moreover, the results indicate that, in general, by changing the cantilever from RC to VSC, the sensitivity to geometrical dimensions decreases, and through the proper selection, the effect of cantilever geometry on manipulation could be controlled. - Author(s): O.I. Kuntyi ; P.Y. Stakhira ; V.V. Cherpak ; O.I. Bilan ; Ye.V. Okhremchuk ; L.Yu. Voznyak ; N.V. Kostiv ; B.Ya. Kulyk ; Z.Yu. Hotra
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 592 –595
- DOI: 10.1049/mnl.2011.0249
- Type: Article
- + Show details - Hide details
-
p.
592
–595
(4)
The surface of palladium particles deposited on the (indium tin oxide) ITO coated glass by means of pulse electrolysis of 0.01 M PdCl2 in dimethylformamide was investigated using atomic force microscopy. It was shown that at the potential value E=−1 V, pulse duration (τon) of 6 ms and pause duration (τoff) of 300 ms the discrete cone-shaped nano-sized particles are formed, which almost uniformly cover the substrate's surface. The size of palladium particles increases with the increase in electrolysis duration. The absorption spectra in visible range of palladium deposited on ITO coincide with the spectrum of ITO. The study of the photoluminescence (PL) of ITO/Pd/Alq3 structure [Alq3 is aluminium tris(8-hydroxyquinoline)] confirmed that with the increase of palladium particles size the quenching of PL of the vacuum-deposited organic semiconductor Alq3 takes place. - Author(s): Yan Ma ; Jikang Jian ; Rong Wu ; Yanfei Sun ; Jin Li
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 596 –598
- DOI: 10.1049/mnl.2011.0232
- Type: Article
- + Show details - Hide details
-
p.
596
–598
(3)
Large-scale cadmium telluride (CdTe) ultra-long single-crystalline micron-size wires were prepared by simple thermal evaporation of a mixture of CdTe and Bi powder. The wires were characterised by X-ray diffraction, energy-dispersive X-ray spectroscopy, scanning electron microscopy, transmission electron microscopy (TEM) and high-resolution TEM. The CdTe wires have a length of up to about 400 µm and diameter of 0.5 to several micrometres. They were found to be single crystalline of zinc blende phase. The growth of CdTe wires was explained by the vapour–liquid–solid mechanism. The as-prepared CdTe micron wires have a narrow photoluminescence peak at 778 nm. - Author(s): J. Sarkar ; P. Dey ; S. Saha ; K. Acharya
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 599 –602
- DOI: 10.1049/mnl.2011.0227
- Type: Article
- + Show details - Hide details
-
p.
599
–602
(4)
The culture filtrate of the fungus, Alternaria alternata, was used for the bio-reduction of sodium selenate to produce selenium nanoparticles. Change in colour to dark red of the reaction mixture signifies the development of nano-α-selenium. Dynamic light scattering experiments, atomic force microscopy, scanning and transmission electron microscopic images explained the formation of monodisperse spherical α-selenium nanoparticles in the range of 30–150 nm. X-ray diffraction spectrum of the nano-Se exhibited a broad peak at the 2thetas angles of 15–35°, signifying its amorphous nature. Energy-dispersive X-ray study revealed the presence of selenium in the nanoparticles. Fourier transform infrared spectroscopy confirmed the presence of a protein shell outside the nanoparticles, which in turn support their stabilisation. A novel method has been presented here to synthesise nano-selenium in which the fungal culture filtrate was used and up-to-date literature survey showed that this is the first report on mycosynthesis of selenium nanoparticles. - Author(s): A.V. Goponenko ; B.J. Boyle ; K.I. Jahan ; M.V. Gerashchenko ; D.E. Fomenko ; V.N. Gladyshev ; Y.A. Dzenis
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 603 –608
- DOI: 10.1049/mnl.2011.0166
- Type: Article
- + Show details - Hide details
-
p.
603
–608
(6)
Precision intracellular sensing, probing and manipulation offer unprecedented opportunities for advances in biological sciences. Next-generation ultra-fine probes will be capable of targeting individual cell organelles. Development of such probes as well as probes capable of penetrating through tough cell walls requires detailed knowledge of cell-probe interaction. This Letter evaluated the applicability of environmental scanning electron microscopy (ESEM) for cell and cell-probe interaction imaging. Several types of cells (plant and yeast cells as well as mouse spermatozoa) were successfully imaged in their natural state, with mouse spermatoza observed by ESEM for the first time. Computerised stage applied to image was tough plant cell walls interactions with several probes. Substantial damage to the cell walls was observed as a result of microprobe penetration. The damage persisted after the probe withdrawal and there was residue of cellular content on the withdrawn probes. Several mechanisms of probe failure were observed in situ global buckling, localised bending followed by the tip break-off, and plastic deformation with permanent bending in the case of ultra-fine metal nanoprobe. The results demonstrate applicability of ESEM for high-resolution in situ imaging of cells. Observed mechanisms of cell damage and probe failure provide guidance for future development of probes for minimally-invasive intercellular probing. - Author(s): S.M.U. Ali ; M. Kashif ; Z.H. Ibupoto ; M. Fakhar-e-Alam ; U. Hashim ; M. Willander
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 609 –613
- DOI: 10.1049/mnl.2011.0310
- Type: Article
- + Show details - Hide details
-
p.
609
–613
(5)
In the present study, highly oriented single-crystal zinc oxide nanotube (ZnO-NT) arrays were prepared by a trimming of ZnO nanorods along the c-axis on the gold-coated glass substrate having a diameter of 100–200 nm and a length of ∼1 µm using a low-temperature aqueous chemical growth process. The prepared (ZnO-NT) arrays were further used as electrochemical enzyme-based glucose sensors through immobilisation of glucose oxidase by the physical adsorption method in conjunction with a Nafion coating. The electrochemical response of the sensor was found to be linear over a relatively wide logarithmic concentration range from 0.5×10−6 to 12×10−3 M. The proposed sensor showed a high sensitivity of 69.12 mV/decade with R=0.9934 for sensing of glucose. A fast-response time less than 4 s with good selectivity, reproducibility and negligible response to common interferents such as ascorbic acid and uric acid prevailed. - Author(s): J. Thirumalai ; R. Chandramohan ; S. Valanarasu ; T.A. Vijayan ; S. Ezhilvizhian
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 614 –618
- DOI: 10.1049/mnl.2011.0252
- Type: Article
- + Show details - Hide details
-
p.
614
–618
(5)
One-dimensional (1D) Y2O2S:Eu3+ nanostructures were successfully synthesised using a composite-hydroxide-mediated method based on the use of molten composite hydroxides as solvent in chemical reactions at ∼200°C. The important role in the initial nucleation stage of growing oriented Y2O2S:Eu3+ nanostructures by controlling the reaction parameters such as the molar ratio between the inorganic precursor and hydroxyl ions, temperature and reaction time are discussed. A reasonable control of the size and morphology are achieved. The advantages of low synthesis temperature, low pressure and low cost in the synthesis of functional nanostructures are presented. The morphology and the phase composition of the prepared nanostructures were characterised by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and energy disperse spectroscopy. The room-temperature photoluminescence spectra indicate its potential applications in light-emission devices. - Author(s): D.-J. Lim ; S.V. Antipenko ; A. Andukuri ; J.A. Corbett ; H.-W. Jun
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 619 –623
- DOI: 10.1049/mnl.2011.0026
- Type: Article
- + Show details - Hide details
-
p.
619
–623
(5)
Pancreatic β-cell lines that possess the same native characteristics as insulin producing β-cells within islets of Langerhans have been widely used to evaluate newly developed scaffolds for the ultimate purpose of improving pancreatic islet transplantation (PIT). However, the morphological and functional characteristics of pancreatic β-cell lines in use are often overlooked; changes are gradually observed with each subsequent subculture of cells. Long-term cultured MIN6 β-cells that have alterations in morphology and function can lead to poor evaluation of newly proposed scaffolds. To investigate the influence of aged MIN6 β-cells in properly assessing a given scaffold, self-assembled nanomatrix platforms formed by peptide amphiphiles (PAs) that mimic native extracellular matrices (ECM) were made, and MIN6 β-cells of different subcultures were cultured for up to seven days. Compared to young MIN6 β-cells, old MIN6 β-cells showed reduced sensitivity in function to the self-assembled nanomatrix platform containing RGDS ligands. Young MIN6 β-cells displayed higher normalised insulin values than old MIN6 β-cells, indicating that the apparent functional performance of ECM-mimicking platforms depends not only on the ECM-mimicking ligands present but also on the condition of cells used to evaluate the ECM-mimicking platform. Moreover, the morphological differences were observed between young and old MIN6 β-cells. Overall, this study describes the importance of using suitable pancreatic β-cell lines in evaluating an ECM-mimicking platform for PIT. - Author(s): Shanying Li ; Yang Jiang ; Di Wu ; Yugang Zhang ; Junwei Li ; Ben Yang ; Xianan Ding ; Honghai Zhong ; Lei Chen ; Lihui Wu
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 624 –627
- DOI: 10.1049/mnl.2011.0305
- Type: Article
- + Show details - Hide details
-
p.
624
–627
(4)
To reduce the size and to lower energy consumption are very important for the portable X-ray detector. It is clear that the nanodetector based on nanotechnology will be the future trend. The single-crystalline Zn0.75Cd0.25Te nanoribbons are synthesised by a two-step process, and the X-ray detectors from individual nanoribbon are fabricated. The X-ray detecting performances are carried out by using three kinds of X-ray source with different energy of 8.857, 9.659 and 11.564 KeV, respectively. The nanodetectors exhibit a high sensitivity, fast response speed, which are attributed to the high-aspect ratio, nearly perfect single-crystalline quality and the reduction of the recombination barrier in the ribbon. The remarkable X-ray responsivity implies that the Zn0.75Cd0.25Te nanoribbons are a very attractive candidate for application in X-ray nanodetectors at room temperature. - Author(s): G. Pircheraghi ; H. Nazockdast ; M.M. Salehi
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 628 –632
- DOI: 10.1049/mnl.2011.0074
- Type: Article
- + Show details - Hide details
-
p.
628
–632
(5)
The aim of the work reported in this Letter was to enhance the interfacial interaction between the modified nanoclay and polymer matrix by surface modification of montmmorilonite (MMT) with 1,12 diaminododecane (DA) via cation exchange reaction. The diamine-modified nanoclay was utilised to prepare a polypropylene-based nanocomposite sample and its performance was compared with the nanocomposite sample containing Cloisite®20A. The nanocomposite samples were prepared by melt compounding process in a laboratory internal mixer. The results of X-ray diffraction in combination with Fourier transform infrared (FTIR) analysis confirmed the cation exchange reaction. The FTIR analysis performed on the DA containing the nanocomposite sample also evidenced that the chemical reaction between the amine groups of the MMT surface modifier and the maleic group of the compatibiliser has occurred. However, only a little increase in nanoclay interlayer d-spacing was observed. The melt linear viscoelastic results of this sample showed a considerable increased complex viscosity, η*, and storage modulus, G′, in the whole range of frequency, but did not show a low frequency solid body behaviour similar to that exhibited by the Cloisite®20A containing sample. The extent of enhancement of interfacial interaction between the silicate layer and the polymer matrix chains in the DA containing sample led to increase of the heat of fusion and crystallisation temperature (TC). From these results, a special microstructure consisting of individual nanoclay aggregates, which were observed in the transmission electron microscopy micrograph, with strong interfacial adhesion to the matrix, is proposed for the DA containing nanocomposite sample. - Author(s): Weina Jia ; Boxiang Jia ; Huiming Lin ; Fengyu Qu ; Xiang Wu ; Jingjie Jiang
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 633 –635
- DOI: 10.1049/mnl.2011.0289
- Type: Article
- + Show details - Hide details
-
p.
633
–635
(3)
Reported is a facile hydrothermal route for the production of ZnS/ZnO heterogeneous core-shell microspheres without the addition of any surfactants or templates. The microstructures and optical properties of the as-synthesised products were analysed by X-ray diffraction, a scanning electron microscope, and photoluminescence (PL) measurements. The as-obtained ZnS/ZnO microspheres have average diameters of about 2 µm. The effect of growth parameters on the morphologies is discussed in detail. A possible growth mechanism is proposed based on experimental results. A PL spectrum of the as-obtained product showed a strong ultraviolet emission peak and a large shoulder peak with wide range. - Author(s): Xiaokuo Yang ; Li Cai ; Weidong Peng ; Peng Bai
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 636 –638
- DOI: 10.1049/mnl.2011.0187
- Type: Article
- + Show details - Hide details
-
p.
636
–638
(3)
Magnetic quantum cellular automata (magnetic QCA or MQCA) circuits, although are very promising, have fundamental and practical limitations. The operation frequency and reliability of MQCA circuits are not encouraging due to slow and robustless MQCA interconnect architectures. Three-phase pipelined clocking signals designed for MQCA bistable zone cells are first presented, and then the authors propose using this clocking integrating mixed magnetic anisotropy to eliminate slow and non-sequential switching in the MQCA interconnects. Micromagnetic simulations on a corner are performed to corroborate the proposed method. More results show that an interconnect comprising NiFe nanomagnets requires lower energy overhead and shows higher operation frequency. Furthermore, the authors study the kink energy of different coupling styles and find that frustration of turning antiferromagnetic state fails MQCA global clocking corner architecture. In general, the proposed interconnect scheme requires no additional magnetic helper blocks and promises fast and robust operation, which is promising in building future nanoscale ultra-high reliability information computation circuits and may inspire wide applications of MQCA devices. - Author(s): Hongfang Jiu ; Yixin Sun ; Zhenghao Li ; Yuanzhong Wang ; Yuehua Fu ; Zhijing Zhang ; Junyan Zhang ; Xiaoming Fan ; Lixin Zhang
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 639 –642
- DOI: 10.1049/mnl.2011.0208
- Type: Article
- + Show details - Hide details
-
p.
639
–642
(4)
Present is a hydrothermal process to fabricate hollow self-assembled Cu2(OH)2CO3 and CuO particles. Urea is employed to serve as not only a precipitant but also the source to afford the templates of gas bubbles. H2O2 may play a role as a catalytic agent to assist decomposition of urea. Polyvinyl pyrrolidone is employed to act as the structure-directing agent to control the topography of products. The as-prepared samples are characterised through X-ray diffraction, transmission electron microscopy and scanning electron microscopy. A probable forming mechanism is performed. - Author(s): Yalin Su ; Zheng Zheng ; Yusheng Bian ; Ya Liu ; Jiansheng Liu ; Jinsong Zhu ; Tao Zhou
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 643 –645
- DOI: 10.1049/mnl.2011.0298
- Type: Article
- + Show details - Hide details
-
p.
643
–645
(3)
A hybrid plasmonic waveguide based on a silicon-on-insulator substrate with an air trench is proposed and investigated. Theoretical analysis demonstrates that the nano-scale air trench could result in strong local field enhancement and tight mode confinement. Besides, the transmission loss of the fundamental hybrid plasmonic mode could also be reduced despite the existence of the high-index silicon rib. The proposed structure is compatible with standard nanofabrication process based on the silicon wafers and could enable various nanophotonic integrated components. - Author(s): Chia-Hung Huang ; Hsunling Bai ; Shu-Ling Liu ; Yao-Ling Huang ; Yao-Hsuan Tseng
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 646 –649
- DOI: 10.1049/mnl.2011.0331
- Type: Article
- + Show details - Hide details
-
p.
646
–649
(4)
A neutral transparent SiO2/TiO2 composite hydrosol was prepared by a coprecipitation-peptisation method using titanium tetrachloride and SiO2 hydrosol as raw materials. The prepared SiO2/TiO2 hydrosols were characterised by X-ray diffraction, Fourier transform infrared spectroscopy and transmission electron microscopy. The evaluation of photocatalytic activity for nitric oxide degradation showed the optimal weight ratio of SiO2/TiO2 is around 1.5. After heating at 700°C for 1 h, the prepared SiO2/TiO2 hydrosol exhibits much higher photocatalytic activity than the commercial TiO2 materials, Degussa P25 and ONID TH. The presence of Ti–O–Si bond in the composite hydrosol results in its good thermal stability. The prepared transparent SiO2/TiO2 hydrosols were stable without agglomeration or gelation after storage at room temperature for over 1.5 years. The neutral SiO2/TiO2 hydrosol could be used as the coating material applying for glass or ceramic building materials which must be treated at high temperature. - Author(s): M. Orvatinia and R. Imani
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 650 –655
- DOI: 10.1049/mnl.2011.0247
- Type: Article
- + Show details - Hide details
-
p.
650
–655
(6)
Zinc-oxide nanostructures were synthesised by carbothermal evaporation of ZnO+C at elevated temperatures. Substrates were silicon wafers, and different materials such as SiO2, Al2O3, Au and silica-gel were used as the catalyst layer. Characterisation of morphology by scanning electron microscopy showed that the catalyst layer has a major role in controlling of geometrical shape and dimensions of the resultant nanostructures. The long and narrow nanowires with a regular cross-section were formed on the substrate coated by Au particles. On the substrate coated by silica-gel, the authors achieved the capillary microtubes with the hexagonal cross-section, nanometre-thick walls and also radial sheets inside them. Such nanostructures are believed to be reported for the first time. The electro-optical specifications of the samples were investigated by measurement of their optical absorption spectra using ultraviolet/visible (UV/VIS) spectrophotometry. Determination of the optical band gap from Tauc's plot showed that, in contrary to different shapes, the samples have identical band gap energy. This phenomenon revealed that the optical behaviour of the nanostructures grown by the proposed method does not depend to their morphology. - Author(s): A. Sobczak-Kupiec ; D. Malina ; Z. Wzorek ; M. Zimowska
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 656 –660
- DOI: 10.1049/mnl.2011.0152
- Type: Article
- + Show details - Hide details
-
p.
656
–660
(5)
Silver nanoparticles (AgNPs) were prepared by a chemical reduction method in an aqueous solution of silver nitrate and sodium borohydride as a reducing agent in the presence of polyvinylpyrrolidone as a stabiliser. The effect of silver salt concentration on the synthesis and properties of AgNPs was investigated. The nanosized silver colloids have been characterised by using scanning electron microscopy and atomic absorption spectrometry. The optical properties of the silver nanoparticles were studied through UV–vis spectroscopy and Fourier transformed infrared (FTIR) spectroscopy. Dynamic light scattering measurement using Zetasizer nano ZS was applied for the size estimation of AgNPs. The results confirmed that silver nanoparticles were formed in each sample independently of silver salt content; however, silver nitrate concentration had a significant influence on silver nanoparticles morphology and other properties. The absorption intensity, the band of the FTIR spectra intensity increases with an increase of silver nitrate concentration. Also, the shape and size of particles depends on the silver nitrate concentration. - Author(s): Jingrui Fang ; Junfeng Ma ; Yong Sun ; Zhensen Liu ; Chang Gao
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 661 –664
- DOI: 10.1049/mnl.2011.0276
- Type: Article
- + Show details - Hide details
-
p.
661
–664
(4)
The combination of electrochemical process with a soft-template can be successfully used in preparing SrNb2O6 crystallites with different particle size and morphology. In the absence of organic additives, SrNb2O6 powders are irregular-shaped aggregates. The introduction of hexadecyl trimethyl ammonium bromide (CTAB) in electrolytic solution will guide SrNb2O6 primary grains to form homogeneous microspheres, but the presence of polyvinylpyrrolidone will weaken the aggregation effect of CTAB spherical micelles and tend to promote the formation of bunched SrNb2O6 microrods. - Author(s): A. Pal ; A. Mehta ; M.E. Marhic ; K.C. Chan ; K.S. Teng
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 665 –667
- DOI: 10.1049/mnl.2011.0320
- Type: Article
- + Show details - Hide details
-
p.
665
–667
(3)
A microdielectric resonator antenna of dimensions (100 ×100 ×500 µm) is designed for biosensing applications. The antenna is terminated with a thin layer of gold on the top and bottom of the microstructure for achieving a high Q. On top of the antenna is the sensing region (100 µm3), which loads the antenna depending on the type of material. The loading in turn changes the antenna reflectance, resonant frequency and polarisation, and thus enables the sensing action. The sensor activation and detection can be done using a far-infrared spectroscopy technique. - Author(s): K.K. Purushothaman ; V. Suba Priya ; S. Nagamuthu ; S. Vijayakumar ; G. Muralidharan
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 668 –670
- DOI: 10.1049/mnl.2011.0260
- Type: Article
- + Show details - Hide details
-
p.
668
–670
(3)
ZnO nanopowders have been synthesised using the spray pyrolysis method. XRD analysis reveals the powder samples to be of crystallite size 19 nm. SEM images indicate petal-like formation for the zinc oxide powder. The electrochemical properties have been studied using cyclic-voltammetric and chrono-potentiometric techniques. The specific capacitance of the ZnO electrode in the presence of 2M KOH electrolyte was 365 F/g at a scan rate of 5 mV/s. The decrease in the specific capacitance of 22% has been observed after 1200 cycles. - Author(s): Yufang Zhu ; Dunliang Jian ; Shulin Wang
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 671 –674
- DOI: 10.1049/mnl.2011.0265
- Type: Article
- + Show details - Hide details
-
p.
671
–674
(4)
In this work, the authors have successfully synthesised amorphous mesoporous magnesium silicate particles by the sol–gel technique combining with block copolymer P123 (EO20PO70EO20) as a template. Mesoporous magnesium silicate particles were characterised by X-ray diffraction, transmission electron microscopy, N2 adsorption–desorption technique, element mapping and energy-dispersive X-ray spectroscopy analysis. The results indicated that homogeneous amorphous mesoporous magnesium silicate particles have 298.4 m2/g of specific surface area and 5.5 nm of mesoporous channels. Using rhodamine B (RhoB) as a model dye, the adsorption capacity on mesoporous magnesium silicate particles can be estimated to 190 mg/g, and the regenerated particles also exhibited good adsorption performance. Therefore these mesoporous magnesium silicate particles have potential as adsorbents for the removal of dyes from water. - Author(s): Zheng Chen ; Graham Dawson ; Jinghai Liu ; Kai Dai
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 675 –677
- DOI: 10.1049/mnl.2011.0267
- Type: Article
- + Show details - Hide details
-
p.
675
–677
(3)
Well-faceted anatase nanocrystals were prepared via phase transition of titanate nanotubes by hydrothermal treatment at high pH (>10). The three-dimensional morphology and facets of these anatase nanocrystals were investigated. When the pH value was increased to 11.5 or higher, novel nanocrystals with a tail-fin-like structure on one side were found in the product. The facets of the tail-fin-like nanocrystal were investigated by high resolution transmission electron microscopy with a tilt-rotate holder. Based on the morphologies, corresponding crystal orientations and the knowledge of crystallography, the facets of the tail-fin-like nanocrystal were determined to be {103}, {101} and {112}. The formation mechanism of these nanocrystals was also discussed. - Author(s): Seung Ho Paek ; Wonseok Yang ; Jong Sun Kim ; Chul Jin Hwang ; Young Ki Choi ; Dong Sung Kim
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 678 –681
- DOI: 10.1049/mnl.2011.0277
- Type: Article
- + Show details - Hide details
-
p.
678
–681
(4)
An alignment-free and low-cost microfabrication technique for dual-opposite silver electrodes inside a polydimethylsiloxane (PDMS) microchannel is presented using multiphase fluids with density difference in a laminar flow regime without a photolithographic process. The electrode patterns were created using chemical deposition at the interface between a silver electroless plating solution (denser fluid) and a reducer solution (less dense fluid). The gravitational force induced by the density difference causes a slight rotation of the interface in the downstream direction, thereby resulting in the dual-opposite electrodes having individual electrical connection patterned on the top and bottom walls of the PDMS microchannel. - Author(s): Chang-Ju Park ; Byung-Phil Mun ; Sung-Keun Yoo ; Jong-Hyun Lee
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 682 –685
- DOI: 10.1049/mnl.2011.0239
- Type: Article
- + Show details - Hide details
-
p.
682
–685
(4)
Presented is the effect of cross-sectional shapes in a diffuser micropump using a hetero-shaped fluidic channel. The hetero-shaped fluidic channel consists of two regions with different cross-sectional shapes: a semi-cylindrical shape for the inlet and a rectangular shape for the outlet. The semi-cylindrical-shaped channel can produce almost zero dead volume in a closed state; thus, the flow rate of the micropump should be enhanced. To evaluate the effect of the cross-sectional shape, both hetero-shaped and homo-shaped micropumps were fabricated with the same cross-sectional area. The flow rate of both micropumps was evaluated in terms of frequency and duty ratio. The experimental comparison demonstrated that the hetero-shaped micropump is generally superior to the homo-shaped one with regards to flow rate. The ratio of the maximum flow rate between the two types was more than five for the experiments performed in this study. The acquired maximum flow rate of the hetero-shaped micropump was 38.76 nl/min, which is ten times larger than that of the homo-shaped micropump in identical conditions (frequency: 3 Hz; duty ratio: 50%). Moreover, the hetero-shaped micropump performed the valve function without additional devices. - Author(s): Wen-Tse Chang ; Gwo-Huei Yang ; Jun-Dar Hwang ; Jun-Hung Lin
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 686 –688
- DOI: 10.1049/mnl.2011.0322
- Type: Article
- + Show details - Hide details
-
p.
686
–688
(3)
Nano silicon dioxide (SiO2) has been deposited on silicon substrate using spin-coating method and Al/nano-SiO2/n-Si metal–oxide semiconductor (MOS) capacitors have been fabricated to characterise their electrical properties using current–voltage (I–V) and capacitance–voltage (C–V) measurements. Field-emission scanning electron microscope shows the spin-oxide with grain size ranging 50–60 nm. For as-formed spin-oxide, a large leakage current density of 5.14×10−5 cm−2 under 5 MV/cm field and fixed oxide charge density of 3.9×1012 cm−2 are obtained. After annealing at 500°C in N2 environment for 30 min, the leakage current and fixed oxide charge density are drastically reduced to 4.3×10−10 A/cm2 and 9×1011 cm−2, respectively. Such a large improvement, by five orders, in leakage current density demonstrates that the prepared nano spin-oxide exhibits a potential application in fabricating high-quality MOS field-effect transistor. - Author(s): G. Massobrio ; A. Massobrio ; L. Massobrio ; P. Massobrio
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 689 –693
- DOI: 10.1049/mnl.2011.0336
- Type: Article
- + Show details - Hide details
-
p.
689
–693
(5)
Monitoring the bioelectrochemical activity of living cells with biosensors represents a technique in a large area of biomedical applications. The main appeal is the ability of these devices to perform, in real-time, non-invasive in vitro investigations of the physiological state of a cell population. In this Letter, the authors present a microsystem model, intended for both electrical activity and cellular metabolism simulation, to detect both extracellular signals and pH variations induced by neuron populations. In particular, the neuroelectronic junction established by interfacing neuronal cells to carbon nanotubes vertically grown on the surface of an ion-sensitive field effect transistor was analysed and modelled to simulate the induced extracellular neuronal electrical activity under environmental pH-stimulated conditions. - Author(s): A.M.A. Elhissi ; M. O'Neill ; W. Ahmed ; K.M.G. Taylor
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 694 –697
- DOI: 10.1049/mnl.2011.0086
- Type: Article
- + Show details - Hide details
-
p.
694
–697
(4)
A novel approach to the determination of steroid entrapment in the bilayers of aerosolised liposomes has been introduced using high-sensitivity differential scanning calorimetry (DSC). Proliposomes were dispersed in water within an air-jet nebuliser and the energy produced during atomisation was used to hydrate the proliposomes and generate liposome aerosols. Proliposomes that included the steroid beclometasone dipropionate (BDP) produced lower aerosol and lipid outputs than steroid-free proliposomes. Size analysis and transmission electron microscopy showed an evidence of liposome formation within the nebuliser, which was followed by deaggregation and size reduction of multilamellar liposomes on nebulisation to a two-stage impinger. For each formulation, no difference in thermal transitions was observed between delivered liposomes and those remaining in the nebuliser. However, steroid (5 mole%) lowered the onset temperature and the enthalpy of the pretransition, and produced a similar onset temperature and larger enthalpy of the main transition, with broadened pretransition and main transitions. This indicates that BDP was entrapped and exhibited an interaction with the liposome phospholipid membranes. Since the pretransition was depressed but not completely removed and no phase separation occurred, it is suggested that the bilayers of the multilamellar liposomes can entrap more than 5 mole% BDP. Overall, liposomes were generated from proliposomes and DSC investigations indicated that the steroid was entrapped in the bilayers of aerosolised multilamellar vesicles. - Author(s): A. Hajnayeb ; S.E. Khadem ; M. Zamanian
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 698 –703
- DOI: 10.1049/mnl.2011.0193
- Type: Article
- + Show details - Hide details
-
p.
698
–703
(6)
The quality factor of thermoelastic damping (TED) in a double-walled carbon nanotube (DWNT) under electrostatic actuation is obtained through an analytical method. Each layer of the DWNT is modelled as an Euler Bernouli beam with simply supported boundary conditions. The DWNT is under electrostatic actuation, and van der Waals forces act between layers. The motion equations, coupled with heat equations, are obtained using the Newton's second law, and are then solved using the strained parameter perturbation method. After solving the equations, the presented approach is implemented for a numerical example. The effect of nanotube length and the applied DC voltage on the quality factor of TED are investigated. The quality factor is also studied for different vibration modes of the DWNT. It is shown that shorter DWNTs under higher DC voltages have lower quality factors of TED. - Author(s): E. Shulga ; K. Pohako ; A. Treshchalov ; U. Joost ; V. Kisand ; I. Kink
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 704 –708
- DOI: 10.1049/mnl.2011.0357
- Type: Article
- + Show details - Hide details
-
p.
704
–708
(5)
Millimetre high aligned carbon nanotubes (ACNTs) were functionalised by nitric acid vapour at low temperature with the formation of carbonyl and carboxyl functional groups. Samples were analysed using a scanning electron microscope (SEM), EDX, Fourier transformed infrared (FTIR), Raman and X-ray photoelectron spectroscopy (XPS). Depending on the temperature and reaction time, the treatment can lead to uniform sidewall functionalisation preserving the alignment of the ACNT ‘forest’, to random destruction, leading to significant modification of the morphology of the ACNT ‘forest’, or in some cases to cutting off the ACNTs from the substrate. Influence of the treatment duration and temperature on samples morphology and oxygen-to-carbon ratio are discussed. - Author(s): Zhongliang Hu ; Yifeng Chen ; Han Chen
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 709 –712
- DOI: 10.1049/mnl.2011.0354
- Type: Article
- + Show details - Hide details
-
p.
709
–712
(4)
Na2PdCl4 and Pd(en)2Cl2 were used as Pd precursors to prepare carbon/Pd composites by chemical reducing exfoliated graphite oxide (GO) and Pd precursor mixture solution according to similar procedures. The obtained samples were examined by X-ray diffraction (XRD), N2 adsorption tests at 77 K and a scanning electron microscope (SEM). It was found the samples prepared from Pd(en)2Cl2 have a relatively large Brunauer–Emmett–Teller (BET) surface area with little graphitic structure while the samples obtained from Na2PdCl4 have a low BET surface area with considerable graphitic structure. SEM tests showed that the Pd nanoparticles (NPs) are decorated in between or on some edges of curved graphene sheets in the sample from Pd(en)2Cl2 while Pd NPs are located on the surface of the reduced graphite substrate in the sample from Na2PdCl4. XRD proved that GO is reduced to graphite in the sample from Na2PdCl4 and it is reduced to graphene sheets in the sample from Pd(en)2Cl2. The Pd(en)22+ can adhere to the graphene oxide sheets, preventing the graphene sheets restacking during reduction and there is no obvious interaction between PdCl42− and the graphene oxide sheets, thus leading the graphene sheets to aggregate to form the graphite structure. The great structure differences between the samples are caused by different ratios of the two contradictive roles: the graphene sheets' tendency to restack to form the graphite structure and the reduced metal nanoparticles' pillared role to separate graphene sheets as spacers. The formation mechanism of carbon/Pd composites is proposed, which is of a theoretical guide for related research. - Author(s): A. Ghafari Nazari ; A. Tahari ; F. Moztarzadeh ; M. Mozafari ; M.E. Bahrololoom
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 713 –717
- DOI: 10.1049/mnl.2011.0381
- Type: Article
- + Show details - Hide details
-
p.
713
–717
(5)
Hydroxyapatite (HAp) micro- and nanoparticles have been widely used as highly promising bioactive materials in different ways because of their bone growth induction. As microbial infection of HAp might be frequently occurred, silver (Ag) can be doped in the HAp lattice to enhance the antimicrobial properties. Herein, Ag-doped HAp was successfully synthesised through an ion exchange reaction. This study describes experiments on the preparation and testing of Ag-loaded HAp as an antibacterial biomaterial. The effects of synthesis conditions such as maturation state and silver ion exchange were investigated on the samples by the Taguchi method. Also, chemical analysis was conducted by atomic absorption spectrophotometers, and the antibacterial activity of the prepared samples against bacterium of Escherichia coli was tested. The effectiveness of the material depends upon the synthesis conditions that were assessed statistically. In addition, the material was examined by scanning electron microscopy and its antibacterial action given a physical basis. Finally, the obtained results indicated that maturation caused an increase in the homogeneity of particles, with a decrease in silver absorption ability and antibacterial activity. - Author(s): Zhiyi Zhang ; Chenguo Hu ; Yabo Zhu ; Shoudong Xu ; Xiaoshan He ; Muhammad Hashim ; Donghu Xiang
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 718 –721
- DOI: 10.1049/mnl.2011.0355
- Type: Article
- + Show details - Hide details
-
p.
718
–721
(4)
This Letter describes a simple molten salt approach to the synthesis of K2Mo4O13 nanobelts with lengths of several tens of micrometres. Scanning electron microscopy, transmission electron microscopy, X-ray diffraction spectrum and energy dispersive spectroscopy are used to characterise the structure, morphology and composition of the sample. The UV-visible spectrum shows that the bandgap of the K2Mo4O13 nanobelts is 3.6 eV. Photoluminescence measurement shows a strong and broad emission peak of 355 nm for the K2Mo4O13 nanobelts. Electrochemical tests show good performance of the material in cycling stability as cathode material for Li-ion batteries. - Author(s): Guoxiu Tong ; Mi Hong ; Jianguo Guan ; Jinhao Yuan ; Wenhua Wu ; Haisheng Qian
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 722 –724
- DOI: 10.1049/mnl.2011.0316
- Type: Article
- + Show details - Hide details
-
p.
722
–724
(3)
Electromagnetic (EM) characteristics of polymorphic Fe nanotubes (INTs) fabricated by a facile gas bubble-engaged assembly technique were studied at 2–18 GHz. The Fe2+ concentration was varied to modulate the tube structure, the characteristics of which are closely related to its resulting microwave absorption properties. INTs with large aspect ratios, thick tube walls and small inner diameters were easy to produce at high Fe2+ concentrations. They showed a strong absorption peak of −22.4 dB at 10.4 GHz and a bandwidth (≤−10 dB) of 12 GHz because of proper EM matching and high dielectric loss. - Author(s): Hai Yan He and Jian-Ming Guo
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 725 –727
- DOI: 10.1049/mnl.2011.0363
- Type: Article
- + Show details - Hide details
-
p.
725
–727
(3)
(Al, Si)-codoped ZnO powders with a constant molar ratio of Zn:Al (99:1) and various molar ratios of Si:Al (0–0.02) were synthesised by a sol–gel process and characterised by X-ray diffraction, field emission scanning electron microscopy, and UV–vis and luminescent spectrophotometry. The experiments indicated that the powders had random orientation and a slightly larger average particle size that increased with increasing Si proportion. The Mo doping resulted in the enhancement of transmittance in the UV–visible light range and the widening of the bandgap. Optimal efficiency appeared at a molar ratio of Si:Al=0.01, and Si doping resulted in the formation of a new emission centre and the enhancement of the emissions in range of visible light. - Author(s): Lihui Zhang ; Hongpeng You ; Mei Yang ; Yanhua Song
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 728 –731
- DOI: 10.1049/mnl.2011.0241
- Type: Article
- + Show details - Hide details
-
p.
728
–731
(4)
Core/shell Y(OH)CO3:Eu3+/YBO3:Eu3+ composites with a well-defined spherical shape and narrow size distribution were fabricated through a simple hydrothermal process for the first time. Y(OH)CO3:Eu3+/YBO3:Eu3+ composites can be obtained via Y(OH)CO3:Eu3+ colloidal spheres partly reacted with H3BO3, with the morphology well-retained. Under UV excitation, the core/shell Y(OH)CO3:Eu3+/YBO3:Eu3+ phosphor emits the typical orange-colour light originating from the 5D0→7FJ transitions of the YBO3:Eu3+ shell. The spherical particles might have potential application for high resolution screens, displays and flat panels. - Author(s): Ismathullakhan Shafiq and Yan-Cheong Chan
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 732 –736
- DOI: 10.1049/mnl.2011.0321
- Type: Article
- + Show details - Hide details
-
p.
732
–736
(5)
Quasi-aligned indium (In)-doped cadmium sulphide (CdS) nanostructures synthesised by the gold (Au) metal-catalysed vapour–liquid–solid growth method on silicon (Si) substrates under different experiment conditions are reported. X-ray diffraction analysis on the as-prepared samples indicated the nanostructures as ‘wurtzite-type’ CdS crystal structures. Characterisation of the morphology and structure revealed the growth of two different geometries; nanopens and nanopencils with tip diameters ranging from 50–100 nm which can be varied through experimental conditions. Electron field emission measurements on the indium-doped quasi-aligned nanopencils and nanopens exhibit low turn-on electric fields of 5.5 and 4.5 V/µm (at the current density of 0.01 mA/cm2) for nanopens and nanopencils, respectively. This low turn-on field can be attributed to the sharp tip and higher indium doping level in the nanostrcutures. In addition, the indium doping into the CdS lattice was analysed by low-temperature photoluminescence spectroscopy (LT-PL). Temperature-dependent PL measurements showed that the PL spectra have three emission peaks at 9 K, which can be attributed to band edge free exciton emission and shallow donor levels donor–acceptor pair exciton emission because of doping. The result presents the promising application of these materials in the field of optoelectronics as efficient electron field emitters. - Author(s): Jiangli Yang ; Zhiyong Gao ; Li Tian ; Pengfei Ma ; Dapeng Wu ; Lin Yang
- Source: Micro & Nano Letters, Volume 6, Issue 8, p. 737 –740
- DOI: 10.1049/mnl.2011.0317
- Type: Article
- + Show details - Hide details
-
p.
737
–740
(4)
TiO2 spindles with high crystallinity were synthesised by a two-step solvothermal reaction with the aid of diethylamine. Compared with Degussa P25, the dye sensitised solar cell (DSSC) based on a TiO2 spindles photoanode demonstrated superior characteristics including higher affinity to N719 dye, higher light scattering effect than P25, better conductance and longer recombination lifetime. Photovoltaic measurement indicated that the TiO2 spindles-based DSSC possesses higher short-circuit current density (Jsc) and open-circuit voltage (Voc), hence, a 29% higher overall photovoltaic performance (η) than that of P25 was achieved.
UV emission from left-handed material through second harmonic generation: optical nanoantenna and imaging application
Enhanced efficiency in dye-sensitised solar cells using a TiO2-based sandwiched film as photoanode
Tunable bandgap opening in the proposed structure of silicon-doped graphene
Sensitivity analysis of the nanoparticles on substrates using the atomic force microscope with rectangular and V-shaped cantilevers
Electrochemical depositions of palladium on indium tin oxide-coated glass and their possible application in organic electronics technology
Growth of single-crystalline ultra-long cadmium telluride micron-size wires via thermal evaporation
Mycosynthesis of selenium nanoparticles
Use of environmental scanning electron microscopy for in situ observation of interaction of cells with micro- and nanoprobes
Functionalised zinc oxide nanotube arrays as electrochemical sensors for the selective determination of glucose
Synthesis and chemical properties of Y2O2S:Eu3+ nanostructures using composite-hydroxide-mediated method
Biological sensitivity to self-assembled nanomatrix platforms depends on the phenotype of MIN6 β-cells
Synthesis and X-ray responsivity of Zn0.75Cd0.25Te nanoribbons
Interfacial effects and microstructure development in the PP/PP-g-MA/diamine-modified nanoclay nanocomposite
Solution growth and optical property of ZnS/ZnO microspheres
Fast and robust magnetic quantum cellular automata interconnect architectures
Fabrication of Cu2(OH)2CO3 and CuO particles: from spindle to nanorod, nanoribbon and hollow structure
Low-loss silicon-based hybrid plasmonic waveguide with an air nanotrench for sub-wavelength mode confinement
Synthesis of neutral SiO2/TiO2 hydrosol and its photocatalytic degradation of nitric oxide gas
Effect of catalyst layer on morphology and optical properties of zinc-oxide nanostructures fabricated by carbothermal evaporation method
Influence of silver nitrate concentration on the properties of silver nanoparticles
Shape-controlled synthesis of SrNb2O6 crystallites by an electrochemical process assisted with surfactants
Microresonator antenna for biosensing applications
Synthesising of ZnO nanopetals for supercapacitor applications
Synthesis of mesoporous magnesium silicate particles and their adsorption property
Anatase nanocrystals with {103} and {112} facets by hydrothermal transformation of titanate nanotubes
Microfabrication of dual-opposite electrodes inside a microchannel by means of multiphase laminar flow with density difference
Cross-sectional shape effect of a diffuser micropump on flow rates
High-quality nano spin-oxide for possible applications in metal–oxide semiconductor field-effect transistor
Silicon-based biosensor functionalised with carbon nanotubes to investigate neuronal electrical activity in pH-stimulated environment: a modelling approach
High-sensitivity differential scanning calorimetry for measurement of steroid entrapment in nebulised liposomes generated from proliposomes
Thermoelastic damping of a double-walled carbon nanotube under electrostatic force
Functionalisation of aligned carbon nanotubes with nitric acid vapour
Comparative study on the formation mechanism of graphene oxide-derived carbon/Pd composites
Ion exchange behaviour of silver-doped apatite micro- and nanoparticles as antibacterial biomaterial
K2Mo4O13 nanobelts: synthesis and properties
Enhanced microwave absorption properties of Fe nanotubes fabricated by a facile gas bubble-engaged assembly technique
Enhancement in the optical transmittance of ZnO:Al powders by Si co-doping
Core/shell Y(OH)CO3:Eu3+/YBO3:Eu3+ phosphors with sphericity, submicrometre size and non-aggregation characteristics
Efficient field emission and optical properties of In-doped cadmium sulphide nanopens and nanopencils
Spindle-like TiO2 with high crystallinity and its application in dye sensitised solar cell
Most viewed content for this Journal
Article
content/journals/mnl
Journal
5
Most cited content for this Journal
-
Vibration of piezoelectric nanofilm-based electromechanical sensors via higher-order non-local strain gradient theory
- Author(s): Mohammad Reza Farajpour ; Abbas Rastgoo ; Ali Farajpour ; Moslem Mohammadi
- Type: Article
-
Approach for ambipolar behaviour suppression in tunnel FET by workfunction engineering
- Author(s): Kaushal Nigam ; Pravin kondekar ; Dheeraj Sharma
- Type: Article
-
Spray coating of polymer electret with polystyrene nanoparticles for electrostatic energy harvesting
- Author(s): Yixin Xu ; Anxin Luo ; Ai Zhang ; Yulong Zhang ; Bin Tang ; Kai Wang ; Fei Wang
- Type: Article
-
Two-dimensional functionalised methacrylated graphene oxide nanosheets as simple and inexpensive electrodes for biosensing applications
- Author(s): Seyed Morteza Naghib
- Type: Article
-
UV-activated room temperature single-sheet ZnO gas sensor
- Author(s): Fanli Meng ; Hanxiong Zheng ; Yufeng Sun ; Minqiang Li ; Jinhuai Liu
- Type: Article
