光致发光
量子点
材料科学
水溶液
波长
硅
纳米技术
发光
光电子学
航程(航空)
化学工程
光化学
化学
物理化学
复合材料
工程类
作者
Yuxiao Zhang,Xijiang Han,Jianming Zhang,Yang Liu,Hui Huang,Hai Ming,Shuit‐Tong Lee,Zhenhui Kang
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2012-01-01
卷期号:4 (24): 7760-7760
被引量:19
摘要
Si quantum dots (SiQDs) based nanospheres (SiNSs) were prepared via a novel synthetic strategy. These SiNSs were demonstrated to possess unique dot spacing dependent photoluminescence (PL) up-conversion and surface dependent (N modified surface) down-converted PL. It was demonstrated that a small distance between SiQDs (<5 nm) is the necessary condition for the PL up-conversion of SiNSs, while the surface state of SiQDs will affect the maximum emission wavelength and the PL intensity. The as-prepared SiNSs feature excellent aqueous dispersibility, and their optical properties were found to be stable enough in a specified temperature and pH range.
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