期刊
CHEMISTRY OF MATERIALS
卷 18, 期 5, 页码 1275-1280出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm051602q
关键词
-
beta-Cyclodextrin (beta-CD)-modified CdSe (beta-CD/CdSe) and CdSe-CdS core-shell structured (beta-CD/CdSe-CdS) quantum dots (QDs) were synthesized by a single-phase approach in aqueous solutions. These receptor-modified QDs are very soluble and stable in water over a wide range of pH values and ionic strengths. Coating a CdS shell on the CdSe core greatly increased the quantum yield (QY) of original CdSe QDs. Photoactivation of these particles by the room light results in 46% QY for beta-CD/CdSe-CdS in water. The surface-anchored beta-CD still retains its host capability for the complexation of different organic species in aqueous solutions. More interestingly, the fluorescence sensitivity of these QDs to the same substrate is ten times higher than that of their counterparts reported in our previous work. Furthermore, the fluorescence of these receptor-modified QDs could be reversibly tuned in two directions, enhancement or quenching, by selectively introducing different redox-active substrates in aqueous media.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据