Optical and nonlinear optical properties of surface-modified CdS nanoparticles

被引：0

作者：

Zhang, Y ^{[1
]}

Fu, DG ^{[1
]}

Wang, X ^{[1
]}

Liu, JZ ^{[1
]}

Lu, ZH ^{[1
]}

机构：

[1] Southeast Univ, Natl Lab Mol & Biomol Elect, Dept Chem & Chem Engn, Nanjing 210096, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2001年 / 181卷 / 1-3期

关键词：

CdS nanoparticles; surface modification; fluorescence; Hyper-Rayleigh scattering; first-order hyperpolarizability;

D O I：

暂无

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：

Hyper-Rayleigh scattering (HRS) technique was used to measure the first-order hyperpolarizability, beta, of CdS nanoparticles with different surface-modifying agents (anion of surfactant bis (2-ethylhexyl) sulfosuccinate, disodium salt (named as AOT-SO3-) and pyridine). The 'per particle' (4 nm mean diameter) beta -values are estimated to fall in the range of 10(-27) esu, Which is among the largest values reported for solution species and the beta -value of pyridine-modified CdS is 1.4-times smaller than AOT-SO3--modified CdS. As a possible explanation, this difference in the beta -values is attributed to the weakening of the two-photon resonance enhancement effect in the pyridine-modified CdS nanoparticles due to the sigma -donation formation of pyridine to the Cd2+-rich surface of CdS. These were demonstrated by two-photon fluorescence measurements, one-photon fluorescence quenching experiments and photolysis experiments. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：145 / 149

页数：5

共 16 条

[1] HYPER-RAYLEIGH SCATTERING IN SOLUTION [J].