机械化学法合成II-VI型半导体纳米颗粒

T. Tsuzuki, P. Nakashima, P. McCormick
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引用次数: 4

摘要

综述了机械化学反应合成II-VI型半导体纳米颗粒的研究进展。在机械磨矿过程中,以稳态方式诱导ZnCl/sub - 2/或CdCl/sub - 2/与碱或碱土硫族化合物发生固态位移反应,在氯盐基质中形成II-VI型半导体纳米颗粒。采用简单的洗涤过程去除氯副产物,分离出的颗粒小于10纳米。通过改变研磨条件、起始材料、退火温度和稀释剂的存在来控制所得颗粒和晶粒尺寸。随着粒子尺寸的减小,由于量子约束效应,CdS的带隙能量和等离子体峰值能量增加。
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Synthesis of II-VI semiconductor nanoparticles by mechanochemical processing
The synthesis of II-VI semiconductor nanoparticles by mechanochemical reaction has been reviewed. Solid-state displacement reactions between ZnCl/sub 2/ or CdCl/sub 2/ and alkali or alkaline earth chalcogenides were induced during mechanical milling in a steady-state manner, leading to the formation of II-VI semiconductor nanoparticles in a chloride salt matrix. A simple washing process employed to remove the chloride byproduct resulted in separated particles of less than 10 nm. The resulting particles and crystallite sizes were controlled by changing the milling conditions, starting materials, annealing temperature and the presence of a diluent. With decreasing particle size, the band-gap energy and plasmon peak energy of CdS increased due to the quantum confinement effect.
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