Effect of pressure on the photoluminescence of polynucleotide-stabilized cadmium sulfide nanocrystals

被引：24

作者：

Li, X ^{[1
]}

Coffer, JL ^{[1
]}

机构：

[1] Texas Christian Univ, Dept Chem, Ft Worth, TX 76129 USA

来源：

CHEMISTRY OF MATERIALS | 1999年 / 11卷 / 09期

关键词：

D O I：

10.1021/cm980485e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This work describes the effects of pressure on the photoluminescence of Q-CdS (quantum-confined cadmium sulfide) nanoparticles stabilized by hexametaphosphate, calf thymus DNA, polyadenylic acid, polyuridylic acid, and polyadenylic-uridylic acid in the pressure range from atmospheric pressure to 4 kbar. A marked difference is observed between Q-CdS/ polyadenylic acid and that of Q-CdS/polyuridylic acid in terms of pressure-induced changes in the luminescence; coating the surface of each type of Q-CdS with cadmium hydroxide results in a leveling effect whereby only a steady diminution of emission intensity is observed in each case. A model involving pressure-induced perturbation of anionic sulfide hole traps at the semiconductor nanocrystal surface is proposed to explain these observations.

引用

页码：2326 / 2330

页数：5

共 24 条

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