Sains Malaysiana 37(3): 277-280(2008)
Controlled-Growth of ZnO Nanowires with Different
Processing Temperature
(Pertumbuhan Terkawal Nanodawai
ZnO pada Suhu
Pemprosesan yang Berbeza)
Yap Chi Chin & Muhammad
Yahaya
School of Applied Physics, Faculty of Science and Technology
Universiti Kebangsaan Malaysia
43600 UKM Bangi, Selangor,
Malaysia
Muhamad
Mat Salleh & Dee Chang Fu
Institute of Microengineering
and Nanotechnology (IMEN)
Universiti Kebangsaan Malaysia
43600 UKM Bangi, Selangor
Malaysia
Received: 12 Jun 2007 / Accepted:18 November
2007
ABSTRACT
ZnO nanowires have been synthesized using a catalyst-free carbothermal reduction approach on SiO2-coated
Si substrates in a flowing nitrogen atmosphere with a mixture of
ZnO and graphite as reactants. The
collected ZnO nanowires
have been characterized by X-ray diffraction, scanning electron
microscopy, energy dispersive spectroscopy
and photoluminescence spectroscopy. Controlled growth
of the ZnO nanowires
was achieved by manipulating the reactants heating temperature from
700 to 1000 oC. It was found that the optimum temperature to
synthesize high density and long ZnO nanowires was about 800 0C. The possible growth
mechanism of ZnO nanowires
is also proposed.
Keywords: ZnO; graphite; nanowires; carbothermal; scanning
electron microscopy
ABSTRAK
Nanodawai ZnO telah disintesis dengan menggunakan pendekatan penurunan karboterma tanpa mangkin pada substrat
Si yang disalut SiO2 di bawah aliran gas nitrogen dengan
campuran ZnO dan grafit sebagai reaktan.
Nanodawai ZnO yang terkumpul dicirikan
dengan menggunakan belauan sinar-X, mikroskopi imbasan elektron, spektroskopi sebaran tenaga dan
spektroskopi fotoluminesen. Pertumbuhan
terkawal nanodawai ZnO telah dicapai dengan
memanipulasi suhu pemanasan reaktan daripada
700oC hingga 1000oC. Didapati suhu yang optimum
untuk mensintesis nanodawai ZnO yang berketumpatan tinggi dan
panjang adalah pada 800oC. Selain itu, mekanisme pertumbuhan
ZnO juga dicadangkan.
Kata kunci: ZnO; grafit; nanodawai; karboterma; mikroskopi imbasan elektron
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