Chiral shells and achiral cores in CdS quantum dots

被引：192

作者：

Elliott, Simon D. ^{[1
]}

Moloney, Micheal P. ^{[2
]}

Gun'ko, Yurii K. ^{[2
]}

机构：

[1] Tyndall Natl Inst, Cork, Ireland

[2] TCD, Sch Chem, CRANN, Dublin, Ireland

来源：

NANO LETTERS | 2008年 / 8卷 / 08期

关键词：

D O I：

10.1021/nl801453g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report and explain circular dichroism in semiconductor quantum dots. US nanocrystals capped with penicillamine enantiomers were prepared and found to be both highly luminescent and optically active. No new features in circular dichroism were observed as the nanocrystal grew larger. Density functional calculations reveal that penicillamine strongly distorts surface Cd, transmitting an enantiomeric structure to the surface layers and associated electronic states. The quantum dot core is found to remain undistorted and achiral.

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页码：2452 / 2457

页数：6

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