Online ISSN
1750-0443
Micro & Nano Letters
Volume 7, Issue 2, February 2012
Volumes & issues:
Volume 7, Issue 2
February 2012
-
- Author(s): Xiaodan Miao ; Xuhan Dai ; Peihong Wang ; Yi Huang ; Guifu Ding ; Xiaolin Zhao
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 99 –100
- DOI: 10.1049/mnl.2011.0572
- Type: Article
- + Show details - Hide details
-
p.
99
–100
(2)
An electromagnetic bistable microactuator fabricated on a single wafer is presented. Its overall size is 3×3×1 mm. Tested results show that the bistable state of the device is realised by 5 V voltage pulse and held by the permanent magnet without current. The response time is 0.96 ms with a large displacement of 160 µm. - Author(s): Zhen Fang ; Xiaoqing Wang ; Qin Wang ; Chenyan Wang ; Fan Fan ; Xiaowang Liu
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 101 –104
- DOI: 10.1049/mnl.2011.0602
- Type: Article
- + Show details - Hide details
-
p.
101
–104
(4)
PbS–Au heterodimer with Au nanoparticles grown on the tips of PbS nanooctahedrons has been successfully fabricated in ethylene glycol by a facile one-pot method. The morphology of the heterodimers could be changed by the displacement of the capping agent. The products were characterised by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy-dispersive spectrometer analysis and UV-vis absorption spectra. Compared with traditional synthesis methods of the heterodimers, the one-pot process is facile for large-scale synthesis. Owing to the charge transition between the heterointerface, a broad absorption peak around 372 nm is observed in UV-vis absorption spectra. - Author(s): J. Charrier ; P. Pirasteh ; Y.G. Boucher ; M. Gadonna
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 105 –108
- DOI: 10.1049/mnl.2011.0653
- Type: Article
- + Show details - Hide details
-
p.
105
–108
(4)
The manufacturing of a porous silicon Bragg reflector on P+ silicon substrate is investigated and the effects of oxidation on the Bragg reflector parameters is studied, notably the shift of the central wavelength after oxidation. This Letter shows how to anticipate the changes due to oxidation rather than to endure them. First, the variations in the refractive index and thickness after oxidation were studied. Then, from these measurements, an oxidised porous silicon Bragg reflector centred at 1550 nm was formed by anticipating the shift of central wavelength during oxidation. There was a good correlation between the experimental and theoretical spectra of the Bragg reflector. - Author(s): F. Shafiei ; M. Behroozibakhsh ; F. Moztarzadeh ; M. Haghbin-Nazarpak ; M. Tahriri
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 109 –114
- DOI: 10.1049/mnl.2011.0533
- Type: Article
- + Show details - Hide details
-
p.
109
–114
(6)
Several fluorine-substituted hydroxyapatite ceramics with the general chemical formula Ca5(PO4)3(OH)1−xFx (0≤x≤1), where x=0.0 (hydroxyapatite; HA), x=0.41 (fluorhydroxyapatite; FHA1) and x=0.69 (fluorhydroxyapatite; FHA2) and x=0.98 (fluorapatite; FA), were synthesised via pH-cycling method. The powders were characterised by using scanning electron microscope, transmission electron microscopy (TEM), Fourier transform infra-red (FTIR), X-ray diffraction (XRD) and F-selective electrode. The TEM micrographs showed that the increasing of fluoride ion concentration will cause a reduction in the aspect ratio of the produced crystallites. The XRD analysis of the calcined powders showed that all of the synthesised powders were pure and their XRD patterns were similar together. Eventually, the FTIR results suggest that the fluorine has substituted instead of hydroxyl groups in the fluoridated hydroxyapatite samples. - Author(s): Li Zhang ; Dezhi Qin ; Qiaoru Liu ; Guoxu He
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 115 –117
- DOI: 10.1049/mnl.2011.0625
- Type: Article
- + Show details - Hide details
-
p.
115
–117
(3)
Zinc sulphide nanoparticles were prepared by a simple biomolecule-assisted biomimetic method at room temperature. X-ray diffraction pattern confirmed the formation of a cubic zinc blende phase of ZnS nanocrystals. Transmission electron microscopy images revealed that the nanoparticles are nearly spherical in shape, with average diameter about 40 nm. The optical property of ZnS nanoparticles was studied by the ultraviolet–visible spectrum. Different template concentrations of lysozyme are used to investigate the influence of biomolecule on the formation of nanoparticles. Fourier transform infrared spectroscopy study suggested ZnS nanoparticles can react with functional groups of lysozyme including –OH and –NH. - Author(s): A. Ravi Sankar ; J. Grace Jency ; J. Ashwini ; S. Das
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 118 –121
- DOI: 10.1049/mnl.2011.0717
- Type: Article
- + Show details - Hide details
-
p.
118
–121
(4)
This Letter presents simulation, fabrication and testing of a high-performance quad-beam silicon piezoresistive accelerometer with very low cross-axis sensitivity. Cross-axis sensitivity in piezoresistive accelerometers is an important issue particularly for high-performance applications. In the present Letter, low cross-axis sensitivity is achieved by improving the device stability by placing four flexures in line with the proof mass edges. The accelerometer device is realised in a single-step double-sided bulk micromachining technique using a 5% dual-doped tetra methyl ammonium hydroxide solution as an anisotropic etchant. Test results of four fabricated devices show an average prime-axis sensitivity of 559.5 µV/g/5 V, a maximum cross-axis sensitivity of 0.62% full scale (FS acceleration=13 g) of the prime-axis sensitivity and nonlinearity at a level of 0.5% of FS which are comparatively better than already reported devices and commercially available piezoresistive sensors. - Author(s): I. Ahmad ; Chang Fu Dee ; G. Husnain ; H.M. Rafique ; Yan Long ; S. Naseem
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 122 –124
- DOI: 10.1049/mnl.2011.0701
- Type: Article
- + Show details - Hide details
-
p.
122
–124
(3)
This Letter presents the experiment of using a high-intensity electron beam to form nanohole, induce bending and fabricate nanocontact on a ZnO nanowire (NW). This study reveals that a nanohole with diameter of not more than 10 nm could easily been created in seconds. A lateral half-cutting on the ZnO NW could induce bending. Nanocontact of the NW could also been achieved by performing a control quasi-sectioning of NW. The electron beam performs rapid localised surface melting and vaporisation in ZnO NW. These processes could possibly be implemented for the fabrication of NW-based devices for the applications of single electron devices and also NW cutting, alignment and carving. - Author(s): M.H. Rahimi ; S.H. Tabaian ; S.P.H. Marashi ; S. Saramad ; M. Arab ; A. Hemasian
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 125 –129
- DOI: 10.1049/mnl.2011.0599
- Type: Article
- + Show details - Hide details
-
p.
125
–129
(5)
The influence of heat treatment on the final arrangement of nanopores in fabrication of ordered porous anodic alumina templates is investigated. The well-established two-step anodising procedure is applied to grow ordered porous anodic aluminum oxide (AAO). The surface condition of the specimens exposed to different heat-treatment processes including stress relieving, full annealing and over annealing processes, were compared with the untreated specimen. They were subsequently etched and the microstructure was examined by optical microscopy. The samples were then treated by the two-step anodising procedure and scanning electron microscopy was utilised to study the obtained AAOs. Consequently, linear-angular fast Fourier transformation technique was used to assess the nanopores ordering and ordered domains. - Author(s): A. Moosavi ; M. Sarrafi ; A. Aghaei ; F.A. Hessari ; M. Keyanpour-Rad
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 130 –133
- DOI: 10.1049/mnl.2011.0461
- Type: Article
- + Show details - Hide details
-
p.
130
–133
(4)
Highly dispersed nano-sized ZnO was prepared inside a mesoporous SBA-15 via sonochemical method. Wet impregnation process accompanied by this method gave rise to roughly 43 wt.% zinc oxide which was loaded inside mesoporous silica as a host structure. The synthesised mesoporous SBA-15 and the impregnated ZnO were characterised, using X-ray diffraction (XRD), transmission electron microscopy, Fourier transform infrared spectroscopy and nitrogen physisorption. Low angle XRD peaks confirmed long-range order of two-dimensional hexagonal symmetry of SBA-15 and also shifting of the peaks to higher angle for ZnO loaded samples. The size of ZnO cluster inside the channels was smaller than the one which detected by XRD. With increasing ZnO content in SBA-15, the relative pressure (P/Po) position found by physisorption test was shifted towards higher pressure. Internal pore volume and surface area were reduced, but the pore diameter was increased. - Author(s): Jingzhou Yin ; Weiguang Zhang ; Jiming Xu
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 134 –136
- DOI: 10.1049/mnl.2011.0531
- Type: Article
- + Show details - Hide details
-
p.
134
–136
(3)
ZnO core–shell microspheres were successfully synthesised on a large scale through a template-free solvothermal reaction of methanol and zinc acetylacetonate hydrate. Morphologies, microstructures and compositions of the products were investigated by X-ray powder diffraction, scanning electron microscopy and transmission electron microscopy. The obtained results indicate that the ZnO microspheres are core–shell structures with an average diameter of 1 µm and an average shell thickness of 200 nm. The experimental parameters such as reaction time and solvents played important roles in the formation of the core–shell structures. A possible growth mechanism was proposed. Room temperature photoluminescence spectrum showed an UV emission at ∼385 nm and a broad green emission at the centre of 550 nm. - Author(s): Shen Xiaofang
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 137 –141
- DOI: 10.1049/mnl.2011.0551
- Type: Article
- + Show details - Hide details
-
p.
137
–141
(5)
Highly luminescent and water-soluble CdTe quantum dots encapsulated in polyvinylpyrrolidone nanoparticles (QDs/PNs) have been synthesised by one-pot aqueous route. Fluorescence of the as-prepared QDs/PNs was tunable from 539 to 606 nm and photoluminescent quantum yield could reach up to 47%. High quality of QDs/PNs was also observed by narrow full-width at half-maximum as small as 36 nm in the fluorescence spectra. Using fluorescence microscopy, we demonstrated uptake of QDs/PNs by 293 T human renal epithelial cells. Our results suggest that such nanoparticles are potentially powerful tools for fluorescent gene delivery reagent. - Author(s): Zhao Dai ; Ying Li ; Wenjuan Guo ; Donglai Qi ; Jimei Zhang
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 142 –145
- DOI: 10.1049/mnl.2011.0603
- Type: Article
- + Show details - Hide details
-
p.
142
–145
(4)
The fluorescent DNA probes using CdTe quantum dots (QDs) and Au nanoparticles (AuNPs) had complicated microstructures because one QD or AuNP can be conjugated to more than one single-stranded DNA (ssDNA) on its surface. In this Letter, an asymmetrical synthesis method of DNA probes was presented to get the DNA probes into the uniform microstructure when poly(N-isopropylacrylamide-co-divinylbenzene) microspheres (PNDMs) were used as templates. The sterically restricted linkages of CdTe QDs with ssDNA (CdTe-DNA1) and AuNPs with complementary ssDNA (Au-DNA2) were both present on PNDMs. After the CdTe-DNA1 and Au-DNA2 were cleaved from carriers and hybridised with each other, the fluorescent DNA probes (CdTe-dsDNA-Au) were prepared using 1 QD with 1 AuNP microstructure and the corresponding quenching efficiency of probes was 64.8%. - Author(s): M.B. Chaudhari ; W.S. Mohammed ; G.L. Hornyak ; J. Dutta
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 146 –148
- DOI: 10.1049/mnl.2011.0610
- Type: Article
- + Show details - Hide details
-
p.
146
–148
(3)
The authors describe an approach to control colour shades by varying the volume fractions of three metal nanoparticles (NPs), Cu, Au and Ag, of fixed size and shape. The NPs were designed to match the absorption peaks of the three primary colours. Using the dynamic Maxwell Garnett equation, an analytical model is extracted that calculates the volume fraction value of each metal for the desired transmission red, green and blue values. The model considers the cross-talk between colours because of the broadening of the plasmon peaks. Maximum error of 10% was observed when producing secondary colour and grey shades. - Author(s): Minhong He ; Youyi Sun ; Ye Tian ; Donglin Li ; Guizhe Zhao
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 149 –151
- DOI: 10.1049/mnl.2011.0655
- Type: Article
- + Show details - Hide details
-
p.
149
–151
(3)
A strategy to prepare flower-like polyaniline (PANI) microspheres was successfully developed. The structure of the flower-like PANI microspheres was characterised by means of scanning electron microscopy, UV–vis spectra and Fourier transform infrared spectroscopy. These results showed the formation of flower-like PANI microspheres with average diameter of about 8 µm. The effect of the reaction time on morphology and electrical conductivity of the polyaniline was further investigated in detail. It showed that the morphology and electrical conductivity of PANI strongly depended on the polymerisation time. Also, the flower-like PANI has higher electrical conductivity compared with that of PANI with others morphology. The result indicates that the flower-like PANI is better to apply on electromagnetic interference shielding materials. - Author(s): Changhua Wang ; Xintong Zhang ; Bo Yuan ; Changlu Shao ; Yichun Liu
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 152 –154
- DOI: 10.1049/mnl.2011.0668
- Type: Article
- + Show details - Hide details
-
p.
152
–154
(3)
Flower-like BiOCl networks composed of intercrossed nanosheets have been synthesised by a simple thermal oxidation method. The nanosheets are highly crystallised and exhibit large percentage of exposed (001) facet. The as-prepared BiOCl networks show much higher activity than that of P25 TiO2 and electrospun BiOCl nanofibres, which is evaluated by degradation of rhodamine B (RB) dye under ultraviolet light irradiation. - Author(s): Jiaorong Fan ; Zhaoying Zhou ; Xing Yang ; Wenyi Liu
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 155 –158
- DOI: 10.1049/mnl.2011.0342
- Type: Article
- + Show details - Hide details
-
p.
155
–158
(4)
Gold nanofilms consisting of networked, cross-linked nanowires were synthesised in large quantities by the integration of electrochemical deposition and dielectrophoresis. The resultant products were characterised by scanning electron microscopy and atomic force microscopy. On the basis of finite-element modelling of the electrode system in terms of the theory of dielectrophoresis and electromagnetism, the authors found that the growth of gold nanowires responded highly to the inhomogeneous electric fields. Also, the morphologies of the gold nanofilm evolve with the deposition time and frequency. Numerical simulations and theoretical analyses offer useful insights into the mechanism. The above study provides strong evidence that this electrochemical and template-free route is a powerful and universal technique to the synthesis for improving nanofilms performance. This strategy can be transplanted into the synthesis of other metallic nanofilms, such as silver and copper. - Author(s): Junshan Liu ; Hongchao Qiao ; Zheng Xu ; Chong Liu ; Junyao Wang ; Liqun Du ; Xi Zhang ; Liding Wang
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 159 –162
- DOI: 10.1049/mnl.2011.0651
- Type: Article
- + Show details - Hide details
-
p.
159
–162
(4)
A simple O2 plasma etching method is developed and first used to fabricate planar nanofluidic channels in thermoplastic polymers. In this process, a copper etching mask with a micron-scale width is made by traditional UV lithography and wet etching on a polymer substrate, then the polymer substrate is etched by O2 plasma in a commonly used plasma cleaner to form the planar nanochannel. Effects of the process parameters of the plasma cleaner on the etching rate are studied. The average etching rate for most thermoplastic polymers used in lab-on-a-chip is about 10 nm/min and the surface roughness is less than 2 nm when radio frequency power and chamber pressure are 60 W and 200 Pa, respectively. To demonstrate this method, a polymethylmethacrylate (PMMA) micro-nanofluidic chip containing nine parallel nanochannels, 100 nm in depth, 5 µm wide and 1 mm long, is fabricated to investigate the ion enrichment of 1 µM fluorescein isothiocyanate (FITC) in 10 mM phosphate buffered saline (PBS) buffer. - Author(s): M. Kashif ; Y. Al-Douri ; U. Hashim ; M.E. Ali ; S.M.U. Ali ; M. Willander
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 163 –167
- DOI: 10.1049/mnl.2011.0681
- Type: Article
- + Show details - Hide details
-
p.
163
–167
(5)
Nanostructure ZnO was grown on thin aluminium layer, deposited on silicon substrate using the sol–gel method. The surface morphologies of nanostructure ZnO at different precursor concentrations were studied using scanning electron microscopy. Raman spectroscopy suggested that nanorods started to grow along with nanoflakes at a precursor concentration of 50 mM and the density of the nanorods significantly increases when the concentration was raised to 75 mM. Raman spectra were intensified and red shifted with the increment of precursor concentration. Optical properties of refractive index and optical dielectric constant are investigated. The structural defects at lower level of precursor were probably due to the hypoxic environment, whereas the red shift of Raman spectra was due to the structural change of ZnO nanocrystals. - Author(s): Xiaojun Zhang ; Guangfeng Wang ; Yan Huang ; Liutao Yu ; Bin Fang
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 168 –170
- DOI: 10.1049/mnl.2011.0424
- Type: Article
- + Show details - Hide details
-
p.
168
–170
(3)
Ni/multi-walled carbon nanotubes (MWNTs) nanocomposites were successfully synthesised via a simple, rapid and efficient approach. The electrochemical performance of the Ni/MWNTs composites modified glassy carbon electrode (Ni/MWNTs/GCE) was evaluated by using cyclic voltammetry. Direct glucose oxidation at such Ni/MWNTs/GCE was investigated in detail by discussing the effect of the structure and materials of the electrode on electrocatalytic oxidation of glucose. As a result, the authors found that the Ni/MWNTs/GCE exhibited high electrocatalytic activity to glucose oxidation in alkaline solution, and could be used for the development of a non-enzymatic glucose sensor. - Author(s): Lijun Zhang ; Chen Wu ; Ling-Feng Mao ; Jianbin Zheng
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 171 –173
- DOI: 10.1049/mnl.2011.0680
- Type: Article
- + Show details - Hide details
-
p.
171
–173
(3)
An integrated static random access memory (SRAM) compiler is proposed to reduce both leakage and dynamic power at circuit and architectural level. Based on source biasing scheme, an extra clamping diode in parallel with a pull-down n-type metal-oxide semiconductor transistor is inserted between the ground and source line of a SRAM cell to achieve reduction in the leakage current as well as data retention capability. Bit line charging/discharging current is greatly decreased by introducing extra Z decoding circuits and thus reducing dynamic power significantly. Test chips with 11 embedded SRAMs have been fabricated in UMC 55 nm complementary metal-oxide semiconductor process and the measurement results have proved the effectiveness of the proposed technique. - Author(s): Youyi Sun ; Ye Tian ; Ming He ; Daining Fan ; Faxing Li ; Qijing Zhang
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 174 –177
- DOI: 10.1049/mnl.2012.0008
- Type: Article
- + Show details - Hide details
-
p.
174
–177
(4)
Silver nanoparticles (SNPs) coated with a thermoresponsive polymer, poly(N-isopropylacrylamide)-g-poly-(ethylene oxide) (PNIPAM-g-PEO), have been prepared by the reduction of silver ions with NaH4B in aqueous solutions. The obtained SNPs were very stable at room temperature because of the extended coil conformation of the PNIPAM-g-PEO chain. At higher temperatures (such as 40°C) above the phase transition of PNIPAM-g-PEO, only minute aggregation between the SNPs was observed, indicating that the PEO chains still retained the ability to stabilise the SNPs. Moreover, the thermoresponsive properties of SNPs coated with PNIPAM-g-PEO were further investigated as a function of the temperature by UV–vis spectroscopy, dynamic light scattering and transmission electron microscopy. The switchable optical and size response of the SNPs triggered by temperature change was observed. The absorbing peak and size of the SNPs was blue shift from 395.0 to 382.5 nm and increased from 29.4 to 33.5 nm at elevating the temperature from 25 to 40°C, respectively. The result was attributed to the phase transition of PNIPAM-g-PEO adsorbing on the surface of the SNPs as a function of temperature. - Author(s): Yan Liu ; Wanzhong Ren ; Jun Han ; Hongtao Cui
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 178 –182
- DOI: 10.1049/mnl.2012.0025
- Type: Article
- + Show details - Hide details
-
p.
178
–182
(5)
A simple synthesis procedure, using epoxide as the precipitation agent, was applied at low temperature to prepare well size-controlled hausmannite (Mn3O4) and kempite (Mn2(OH)3C1) nanoparticles. During the preparation, the hydrolysis of aquo complexes of metal ions was promoted by the ring opening reaction of epoxide through the protonation of its oxygen. Owing to the low acidity of aquo Mn2+ complexes in solution, the slow protonation of epoxide could also lead to the subsequent rise in the pH of the solution, which allows alternative side reactions to occur to a significant degree and cause precipitation to take place instead of sol or gel. Owing to the unique chemistry of propylene oxide, the structure of the as-prepared nanoparticles can be well controlled through the controlling of the reaction temperature and Mn2+ concentration. The hydrolysis and further condensation of aquo Mn2+ complexes resulted in the formation of Mn3O4 nanoparticles. On the other hand, their partial hydrolysis occurred without further condensation of the generated hydroxide intermediate under high Mn2+ concentration. This induced the interposition of Cl− ions into intermediate to form the structure of Mn2(OH)3C1. As confirmed by characterisation results, the size of nanoparticles with the corresponding pure phases increased with the increase in Mn2+ concentration and reaction temperature. - Author(s): Juan Zhang ; Yanqin Liang ; Ning Li ; Xiumei Zhao ; Renjie Hu ; Fuqiang Hu ; Jinfeng Xing ; Liandong Deng ; Anjie Dong
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 183 –187
- DOI: 10.1049/mnl.2011.0580
- Type: Article
- + Show details - Hide details
-
p.
183
–187
(5)
This Letter focuses on the preparation and characterisation of a novel amphiphilic multiblock poly(ether-ester anhydride) copolymer [poly(sebacic acid-b-poly(ethylene glycol)-b-sebacic acid) (PES)], paclitaxel-loaded PES nanoparticles (NPs), in vitro evaluation of the release of paclitaxel and cytotoxicity of NPs. PES was prepared by melt polycondensation and the PES NPs were prepared by nanoprecipitation technique. In vitro release behaviour of the paclitaxel-loaded NPs was investigated by high-performance liquid chromatography (HPLC). In vitro cytotoxicity of NPs was evaluated by MTT assay. The composition and structure of PES are consistent with that of the designed copolymer. The paclitaxel-loaded NPs are of spherical shape and size lower than 200 nm. Paclitaxel can be continuously released from the paclitaxel-loaded NPs. The PES NPs are non-toxic to cells. The results suggest that PES NPs are a potential candidate nanocarrier material for the controlled delivery of paclitaxel and other hydrophobic compounds. - Author(s): D.F. Wang ; T. Ikehara ; M. Nakajima ; R. Maeda
- Source: Micro & Nano Letters, Volume 7, Issue 2, p. 188 –192
- DOI: 10.1049/mnl.2011.0618
- Type: Article
- + Show details - Hide details
-
p.
188
–192
(5)
Two novel oscillation systems, consisting of a U-shaped cantilever and a beam-shaped cantilever, were designed, fabricated and comparatively characterised for synchronised oscillation-based applications. In the case of without mechanical elements, two geometrically different cantilevers, with resonant frequencies of 182.506 kHz (detecting) and 372.503 kHz (sensing), respectively, are coupled by two coupling overhangs. Under synchronised oscillation, the frequency response was found to double from 182.850 to 365.713 kHz from a low-frequency cantilever (U shaped) to a high-frequency cantilever (beam shaped). A plateau with a frequency ratio of 2.000 was observed for both systems, which corresponds to a stable synchronisation region. This demonstrates the possibility of increasing the frequency response signal from the low-frequency cantilever to the high-frequency cantilever based on this super harmonic synchronisation. However, based on the comparative studies of two systems with and without mechanical systems, it is found that enhancing the nonlinearity without increasing energy loss (support loss in the present study) seems to be necessary to widen the frequency entrainment range for real applications.
Electromagnetic bistable microactuator fabricated on a single wafer
One-pot protocol for the synthesis of PbS–Au heterodimers consisting of Au nanoparticle on PbS nanooctahedrons
Bragg reflector formed on oxidised porous silicon
Nanocrystalline fluorine-substituted hydroxyapatite [Ca5(PO4)3(OH)1−xFx (0≤x≤1)] for biomedical applications: preparation and characterisation
Biomimetic synthesis and characterisation of ZnS nanoparticles in aqueous solution of lysozyme
Realisation of silicon piezoresistive accelerometer with proof mass-edge-aligned-flexures using wet anisotropic etching
Use of high-intensity electron beam to form nanohole, induce bending and fabricate nanocontact on a ZnO nanowire
Heat treatment of aluminum in preparing porous anodic alumina templates
Synthesis of mesoporous ZnO/SBA-15 composite via sonochemical route
Single-step synthesis of core–shell ZnO microspheres
Encapsulation of CdTe quantum dots in polyvinylpyrrolidone nanoparticle for live cell imaging
Quantum dots and Au nanoparticles conjugated fluorescent DNA probes into uniform microstructure by asymmetrical synthesis
Chromatic tuning of plasmon resonance of tri-layered composites: silver, gold and copper nanoparticles for optical thin film colour filter
Synthesis of flower-like polyaniline microspheres with a novel strategy
Simple route to self-assembled BiOCl networks photocatalyst from nanosheet with exposed (001) facet
Control synthesis and numerical analysis of gold nanofilms after electric-field-assisted, one-step deposition
Fabrication of planar nanofluidic channels in thermoplastic polymers by O2 plasma etching
Characterisation, analysis and optical properties of nanostructure ZnO using the sol–gel method
Non-enzymatic glucose detection using Ni/multi-walled carbon nanotubes composite
Integrated SRAM compiler with clamping diode to reduce leakage and dynamic power in nano-CMOS process
Synthesis of silver nanoparticles with thermo-controllable optical properties
Synthesis of hausmannite and kempite nanoparticles at low temperature via an epoxide precipitate route
Poly(ether-ester anhydride)-based amphiphilic block copolymer nanoparticle as delivery devices for paclitaxel
Characterisation of micromechanically coupled U-shaped cantilever-based oscillators with and without micromechanical elements for synchronised oscillation-based applications
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
