Observation of large changes in the band gap absorption energy of small CdSe nanoparticles induced by the adsorption of a strong hole acceptor

被引：96

作者：

Landes, C ^{[1
]}

Braun, M ^{[1
]}

Burda, C ^{[1
]}

El-Sayed, MA ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Chem & Biochem, Laser Dynam Lab, Atlanta, GA 30332 USA

来源：

NANO LETTERS | 2001年 / 1卷 / 11期

关键词：

D O I：

10.1021/nl015619t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

When butylamine In relatively high concentrations (0.1-0.25 M) is added to a colloidal solution of CdSe nanoparticles (NPs) that are approximately 1.6 nm in diameter, the band gap absorption changes from a broad, relatively weak absorption centered at 445 nm to a narrow, relatively strong absorption centered at 414 nm. The effect of concentration on the observed spectrum shows an isobestic point, suggesting an equilibrium between two species. The possible mechanisms for such a transformation are discussed.

引用

页码：667 / 670

页数：4

共 16 条

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