Formation of ZnO nanocrystalline via facile non-hydrolytic route

M. Ooi, A. Azlan, M. Abdullah
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引用次数: 2

Abstract

The emerging of nanotechnology lately has contributes to a numerous study in nano discipline especially in synthesizing nanomaterial, describing the mechanism and examining its behavior as to further utilizing it into a device. One of interesting material to be study is Zinc Oxide (ZnO) which is a well known (II–VI) compound semiconductor possessing hexagonal wurtzite structure. It has receives a lot of attention due to its wide band gap (3.37 eV), high exciton binding energy (60 meV at room temperature), transparent conductivity, bio-compatibility and bio-safety enabling ZnO to be employed as an optoelectronic device, gas sensor, catalyst, solar cell [1] and biomaterial. ZnO nanostructures such as nanorod, nanobelt, nanoflake, nanoflowers and nanoparticles exhibit different properties from the bulk. Hence, intensively research on the preparative techniques has been reported by many groups. Techniques based on physical vapor deposition such as pulsed laser deposition (PLD), sputtering and thermal decomposition usually require expensive equipment, highly cost maintenance and limited to small scale production. Whereas, wet chemical synthesis such as sol-gel, hydrothermal, sonochemical and precipitation often yields large-scale production, low cost equipment and inexpensive raw material.
非水解制备ZnO纳米晶的研究
近年来,纳米技术的兴起促进了纳米学科特别是纳米材料的合成、纳米材料的机理描述和纳米材料的性能研究,以期进一步将纳米材料应用到器件中。氧化锌(ZnO)是一种众所周知的具有六方纤锌矿结构的(II-VI)化合物半导体。ZnO具有宽带隙(3.37 eV)、高激子结合能(室温下为60 meV)、透明导电性、生物相容性和生物安全性等优点,被广泛应用于光电器件、气体传感器、催化剂、太阳能电池[1]和生物材料等领域。ZnO纳米结构如纳米棒、纳米带、纳米片、纳米花和纳米颗粒表现出不同于体的性能。因此,许多研究小组对其制备技术进行了深入的研究。基于物理气相沉积的技术,如脉冲激光沉积(PLD)、溅射和热分解,通常需要昂贵的设备、高成本的维护和仅限于小规模生产。而溶胶-凝胶法、水热法、声化学法和沉淀法等湿法化学合成方法往往能实现大规模生产、低成本设备和廉价原料。
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