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A microwave-assisted heating method for growing well-aligned zinc oxide (ZnO) nanorods on the ZnO/silicon (Si) substrate is developed. For ZnO nanorods growth, a thin ZnO seed layer was deposited on an Si substrate by sputtering technique. The ZnO nanorods grown on the ZnO/Si substrate were synthesised in aqueous solution mixed with zinc nitrate hexahydrate and hexamethylenetetramine (HMTA) under microwave heating. The scanning electron microscopy (SEM) images and X-ray diffraction results exhibit that the ZnO nanorods with hexagonal phase, single crystalline, and highly oriented along (002) plane are obtained successfully. SEM images also show that the morphology and diameter of the synthesised ZnO nanorods can be controlled by adjusting the molar ratio of Zn(NO3)2·6H2O to HMTA. The Raman scattering results evidence the vertical well-aligned ZnO nanrods with larger diameter are strain-free. The investigations of the photoluminescence spectra suggest that the ultraviolet emission peak of the synthesised ZnO nanorods depending on its controllable diameter would be applicable for various nanodevice fabrications.
References
-
-
1)
-
12. Unalan, H.E., Hiralal, P., Rupesinghe, N., et al: ‘Rapid synthesis of aligned zinc oxide nanowires’, Nanotechnology, 2008, 19, (25), p. 255608 (doi: 10.1088/0957-4484/19/25/255608).
-
2)
-
18. Cheng, A.J., Tzeng, Y., Xu, H., et al: ‘Raman analysis of longitudinal optical phonon-plasmon coupled modes of aligned ZnO nanorods’, J. Appl. Phys., 2009, 105, (7), p. 73104 (doi: 10.1063/1.3093877).
-
3)
-
13. Tsai, M.K., Huang, C.C., Lee, Y.C., et al: ‘A study on morphology control and optical properties of ZnO nanorods synthesized by microwave heating’, J. Lumin., 2012, 132, (1), pp. 226–230 (doi: 10.1016/j.jlumin.2011.08.008).
-
4)
-
11. Law, M., Greene, L.E., Johnson, J.C., et al: ‘Nanowire dye-sensitized solar cells’, Nat. Mater., 2005, 4, (6), pp. 455–459 (doi: 10.1038/nmat1387).
-
5)
-
3. Cong, G.W., Wei, H.Y., Zhang, P.F., et al: ‘One-step growth of ZnO from film to vertically well-aligned nanorods and the morphology-dependent Raman scattering’, Appl. Phys. Lett., 2005, 87, (23), p. 231903 (doi: 10.1063/1.2137308).
-
6)
-
20. Liu, C., Masuda, Y., Wu, Y., et al: ‘A simple route for growing thin films of uniform ZnO nanorod arrays on functionalized Si surfaces’, Thin Solid Films, 2006, 503, (1–2), pp. 110–114 (doi: 10.1016/j.tsf.2005.12.075).
-
7)
-
1. Baxter, J.B., Aydila, E.S.: ‘Nanowire-based dye-sensitized solar cells’, Appl. Phys. Lett., 2005, 86, (5), p. 53114 (doi: 10.1063/1.1861510).
-
8)
-
15. Greene, L.E., Law, M., Tan, D.H., et al: ‘General route to vertical ZnO nanowire arrays using textured ZnO seeds’, Nano Lett., 2005, 5, (7), pp. 1231–1236 (doi: 10.1021/nl050788p).
-
9)
-
2. Tsukazaki, A., Ohtomo, A., Onuma, T., et al: ‘Repeated temperature modulation epitaxy for p-type doping and light-emitting diode based on ZnO’, Nat. Mater., 2005, 4, (1), pp. 42–46 (doi: 10.1038/nmat1284).
-
10)
-
19. Shabannia, R., Abu Hassan, H., Mahmodi, H., et al: ‘ZnO nanorod ultraviolet photodetector on porous silicon substrate’, Semicond. Sci. Technol., 2013, 28, (11), p. 115007 (doi: 10.1088/0268-1242/28/11/115007).
-
11)
-
16. Ahsanulhaq, Q., Umar, A., Hahn, Y.B.: ‘Growth of aligned ZnO nanorods and nanopencils on ZnO/Si in aqueous solution: growth mechanism and structural and optical properties’, Nanotechnology, 2007, 18, (11), p. 115603 (doi: 10.1088/0957-4484/18/11/115603).
-
12)
-
10. Vayssieres, L.: ‘Growth of arrayed nanorods and nanowires of ZnO from aqueous solutions’, Adv. Mater., 2003, 15, (5), pp. 464–466 (doi: 10.1002/adma.200390108).
-
13)
-
21. Yang, Y.H., Chen, X.Y., Feng, Y., et al: ‘Physical mechanism of blue-shift of UV luminescence of a single pencil-Like ZnO nanowire’, Nano Lett., 2007, 7, (12), pp. 3879–3883 (doi: 10.1021/nl071849h).
-
14)
-
5. Ma, T., Guo, M., Zhang, M., et al: ‘Density-controlled hydrothermal growth of well-aligned ZnO nanorod arrays’, Nanotechnolgy, 2007, 18, (3), p. 35605 (doi: 10.1088/0957-4484/18/3/035605).
-
15)
-
4. Tak, Y., Yong, K.: ‘Controlled growth of well-aligned ZnO nanorod array using a novel solution method’, J. Phys. Chem. B, 2005, 109, (41), pp. 19263–19269 (doi: 10.1021/jp0538767).
-
16)
-
17. Fan, H.B., Yang, S.Y., Zhang, P.F., et al: ‘A simple route of morphology control and structural and optical properties of ZnO grown by metal-organic chemical vapour deposition’, Chin. Phys. Lett., 2008, 25, (8), pp. 3063–3066 (doi: 10.1088/0256-307X/25/8/036).
-
17)
-
6. Huang, M.H., Mao, S., Feick, H., et al: ‘Room-temperature ultraviolet nanowire nanolasers’, Science, 2001, 292, (5523), pp. 1897–1899 (doi: 10.1126/science.1060367).
-
18)
-
14. McPeak, K.M., Le, T.P., Britton, N.G., et al: ‘Article previous article next article table of contents chemical bath deposition of ZnO nanowires at near-neutral pH conditions without hexamethylenetetramine (HMTA): understanding the role of HMTA in ZnO nanowire growth’, Langmuir, 2011, 27, (7), pp. 3672–3677 (doi: 10.1021/la105147u).
-
19)
-
8. Petrella, A.J., Deng, H., Roberts, N.K., et al: ‘Single-source chemical vapor deposition growth of ZnO thin films using Zn4O(CO2NEt2)6’, Chem. Mater., 2002, 14, (10), pp. 4339–4342 (doi: 10.1021/cm0204324).
-
20)
-
9. Liu, R., Vertegel, A.A., Bohannan, E.W., et al: ‘Epitaxial electrodeposition of zinc oxide nanopillars on single-crystal gold’, Chem. Mater., 2001, 13, (2), pp. 508–512 (doi: 10.1021/cm000763l).
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