Symmetric and Asymmetric Au–AgCdSe Hybrid Nanorods

This paper describes a facile method for synthesis of Au–AgCdSe hybrid nanorods with controlled morphologies and spatial distributions. The synthesis involved deposition of Ag tips at the ends of Au nanorod seeds, followed by selenization of the Ag tips and overgrowth of CdSe on these sites. By simp...

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Bibliographic Details
Published in:Nano letters 2012-10, Vol.12 (10), p.5281-5286
Main Authors: Liang, Shan, Liu, Xiao-Li, Yang, Yue-Zhou, Wang, Ya-Lan, Wang, Jia-Hong, Yang, Zhong-Jian, Wang, Liang-Bing, Jia, Shuang-Feng, Yu, Xue-Feng, Zhou, Li, Wang, Jian-Bo, Zeng, Jie, Wang, Qu-Quan, Zhang, Zhenyu
Format: Article
Language:English
Subjects:
Cadmium selenides
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Deposition
Exact sciences and technology
Gold
Intermetallics
Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties
Materials science
Nanocrystalline materials
Nanorods
Nanoscale materials and structures: fabrication and characterization
Nanostructure
Nanotubes
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
Physics
Silver
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
Synthesis
Tips
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Summary:This paper describes a facile method for synthesis of Au–AgCdSe hybrid nanorods with controlled morphologies and spatial distributions. The synthesis involved deposition of Ag tips at the ends of Au nanorod seeds, followed by selenization of the Ag tips and overgrowth of CdSe on these sites. By simply manipulating the pH value of the system, the AgCdSe could selectively grow at one end, at both the ends or on the side surface of a Au nanorod, generating a mike-like, dumbbell-like, or toothbrush-like hybrid nanorod, respectively. These three types of Au–AgCdSe hybrid nanorods displayed distinct localized surface plasmon resonance and photoluminescence properties, demonstrating an effective pathway for maneuvering the optical properties of nanocrystals.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl3025505