Selenium Redox Reactivity on Colloidal CdSe Quantum Dot Surfaces.
Selenium Redox Reactivity on Colloidal CdSe Quantum Dot Surfaces.
复制标题
胶体CDSE量子点表面上的硒氧化还原反应性。
DOI:
10.1021/jacs.6b06548
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发表时间:
2016-09-07
影响因子:
15
通讯作者:
Gamelin DR
中科院分区:
文献类型:
--
作者:
Tsui EY;Hartstein KH;Gamelin DR
Understanding the structural and compositional origins of midgap states in semiconductor nanocrystals is a longstanding challenge in nanoscience. Here, we report a broad variety of reagents useful for photochemical reduction of colloidal CdSe quantum dots, and we establish that these reactions proceed via a dark surface prereduction step prior to photoexcitation. Mechanistic studies relying on the specific properties of various reductants lead to the proposal that this surface prereduction occurs at oxidized surface selenium sites. These results demonstrate the use of small-molecule inorganic chemistries to control the physical properties of colloidal QDs and provide microscopic insights into the identities and reactivities of their localized surface species.
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