本文利用化学水浴沉积法,在单分散的二氧化硅球表面包覆硫化镉,制备出二氧化硅@硫化镉核壳结构.通过改变反应物质的量以及反应温度等条件,得到了具有不同核壳比的二氧化硅@硫化镉核壳结构.实验发现随着二氧化硅@硫化镉核壳结构中硫化镉晶粒尺寸的减小,其吸收边和光致发光峰都产生了蓝移;这主要是由于随着硫化镉晶粒尺寸的减小,该材料体系的光学特性由体效应向量子尺寸效应的转变造成的.
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