纳米晶材料
紫外线
带隙
纳米颗粒
水溶液
吸收(声学)
蓝移
粒径
吸收光谱法
谱线
航程(航空)
材料科学
粒度分布
粒子(生态学)
纳米晶
分析化学(期刊)
化学工程
化学
纳米技术
光学
物理化学
光致发光
光电子学
色谱法
海洋学
复合材料
工程类
地质学
天文
物理
作者
Junyong Kang,Shin Tsunekawa,A. Kasuya
标识
DOI:10.1016/s0169-4332(01)00184-2
摘要
Aqueous sols having SnO2 nanocrystalline particles less than 2 nm in mean diameter were prepared by ultra-filtration from original acidic and alkaline sols with particle diameters extending over a wide range of 0.5–8 nm. Blue shifts were observed in ultraviolet absorption spectra of both the sols. The relationship between energy band gap and size distribution in the original and ultra-filtrated sols suggests that the blue shifts depend on not only the particle size but also the chemical state of nanoparticle surfaces in the acidic and alkaline sols.
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