A facile route to silver-cadmium sulfide core-shell nanoparticles and their nonlinear optical properties
A facile route to silver-cadmium sulfide core-shell nanoparticles and their nonlinear optical properties
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银硫化镉核壳纳米颗粒及其非线性光学特性的简便途径
DOI：
10.1016/j.matlet.2013.03.137
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发表时间：
2013-08-01
影响因子：
3
通讯作者：
Peng, Zhijian
中科院分区：
文献类型：
--
作者：
Fu, Xiuli;Wu, Zhipei;Peng, Zhijian
由于银-镉硫化物核壳纳米粒子之间存在较大的晶格失配，因此具有位置和形态控制的银-镉核壳纳米粒子的合成仍然是一个挑战。本文采用反胶束法制备了核形态和壳层厚度可控的Ag@CDS CSNPs。Z-扫描测试表明，合成的CSNPs在室温下表现出明显的非线性响应。CSNPs的非线性吸收系数和折射率都比纯CdS壳层提高了几十倍，这是由于立方体银芯的局域表面等离子体激元的局域场增强所致。(C)2013爱思唯尔B.V.保留所有权利。
The synthesis of silver-cadmium sulfide core-shell nanoparticles (Ag@CdS CSNPs) with positional and morphological control still remains a challenge because of the large lattice mismatch between the two components. In this paper, Ag@CdS CSNPs with controllable core morphology and shell thickness were synthesized by using a reversed micelle method. Z-scan measurements show that the synthesized CSNPs exhibit an obvious nonlinear response at room temperature. Both the nonlinear absorption coefficient and refraction index of the CSNPs increase tens of times as those of the pure CdS shell counterparts, which result from the large local field enhancement of localized surface plasmon of cubic Ag core. (C) 2013 Elsevier B.V. All rights reserved.