Bifunctional Magneto-Optical FePt-CdS Hybrid Nanoparticles

被引：59

作者：

He, Shuli ^{[1
,3
]}

Zhang, Hongwang ^{[2
]}

Delikanli, Savas ^{[1
]}

Qin, Yueling ^{[1
]}

Swihart, Mark T. ^{[2
]}

Zeng, Hao ^{[1
]}

机构：

[1] SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA

[2] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA

[3] Capital Normal Univ, Dept Phys, Beijing 100037, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 01期

基金：

美国国家科学基金会;

关键词：

CDSE/CDS CORE/SHELL NANOCRYSTALS; ONE-POT SYNTHESIS; MAGNETIC NANOPARTICLES; SELECTIVE GROWTH; QUANTUM DOTS; SEMICONDUCTOR; HETEROSTRUCTURES; NANOSTRUCTURES; NANOCOMPOSITES; PERSPECTIVES;

D O I：

10.1021/jp806247f

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 paper describes preparation of binary FePt-CdS hybrid nanoparticles by spontaneous heteroepitaxial nucleation and growth of the CdS component onto FePt-seed nanoparticles in high-temperature organic solution. FePt nanoparticles with average sizes of 4 and 9 nm were used as seeds. Lattice mismatch makes complete coating of the seed particles unfavorable, resulting in peanut-like and flower-like FePt-CdS nanoparticles. The CdS photoluminescence is quenched in 9 nm FePt-CdS hybrid nanoparticles. The band edge emission is observed in 4 nm FePt-CdS nanoparticles, albeit with substantially lower intensity than in pure US nanoparticles. We suggest that the strong FePt-size dependent photoluminescence intensity results from the interplay between interface charge transfer and quantum confinement effects.

引用

页码：87 / 90

页数：4

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