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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