Growth of zinc oxide nanostructures
Tóm tắt
Zinc oxide (ZnO) nanowhiskers have been prepared using a multilayer ZnO(50 nm)/Zn(20 nm)/ZnO(2μm) structure on a polished stainless steel (SS) substrate by high rate magnetron sputtering. The formation of uniformly distributed ZnO nanowhiskers with about 20 nm dia. and 2 to 5 μm length was observed after a postdeposition annealing of the prepared structure at 300–400° C. An array of highlyc-axis oriented ZnO columns (70–300 nm in dia. and up to 10 μm long) were grown on Si substrates by pulsed laser deposition (PLD) at a high pressure (1 Torr), and Raman studies showed the activation of surface phonon modes. The nanosized powder (15–20 nm) and nanoparticle ZnO films on glass substrate were also prepared by a chemical route. Nanowhiskers showed enhanced UV light detection characteristics, and the chemically prepared ZnO nanoparticle films exhibited good sensing properties for alcohol
Tài liệu tham khảo
M S Gudiksen, L J Lauhon, J Wang, D C Smith and C M Lieber,Nature (London) 415, 617 (2002)
Y Takahashi, M Kanamori, A Kondoh, H Minoura and Y Ohya,Jpn. J. Appl. Phys. 33, 611 (1994)
The chemistry of nanomaterials edited by C N R Rao, A Muller and A K Cheethan (Wiley-VCG Verlag GmbH & Co. KGaA.Weinheim, 2004)
Sanjeev Kumar, Vinay Gupta and K Sreenivas,Nanotechnology 16, 167 (2005)
C A Arguello, D L Rousseau and S P Porto,Phys. Rev. 181, 351 (1969)
E A Meulenkamp,J. Phys. Chem. B102, 566 (1998)