Transverse oxidation of gold nanorods assisted by selective end capping of silver oxide

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	Transverse oxidation of gold nanorods assisted by selective end capping of silver oxide
	Z. H. Bao; Z. H. Sun; M. D. Xiao; H. J. Chen; L. W. Tian; J. F. Wang
	2011
发表期刊	Journal of Materials Chemistry
ISSN	0959-9428
卷号	21 期号:31 页码:11537-11543
摘要	An approach for the transverse oxidation of Au nanorods has been demonstrated by selectively capping the ends of the nanorods with Ag(2)O through a hydrothermal reaction. The tight Ag(2)O capping protects the ends of the nanorods and restricts oxidation to occurring only at the side surfaces. Such transverse oxidation leads to a gradual reduction in the effective diameter of the nanorods, an increase in the effective aspect ratio, and therefore a red shift in the longitudinal plasmon resonance. The red shift in the longitudinal plasmon resonance can reach up to 250 nm and be controlled by varying the oxidation time. In addition, the Ag(2)O capping and transverse oxidation process is also applicable for Au nanorods with different longitudinal plasmon resonance wavelengths. Furthermore, the transverse oxidation is nonuniform. It produces dimples on the side surfaces of the Au nanorods. Numerical electrodynamic calculations indicate that the oxidized nanorods exhibit stronger electric field intensity enhancements at the dimples for both the longitudinal and transverse plasmon resonances in comparison to the unoxidized nanorods. We believe that this transverse oxidation approach will be beneficial to the design and preparation of Au nanostructures for various biotechnological applications.
部门归属	[bao, zhihong; tian, linwei] chinese univ hong kong, sch publ hlth & primary care, shatin, hong kong, peoples r china. [bao, zhihong; xiao, manda; chen, huanjun; wang, jianfang] chinese univ hong kong, dept phys, shatin, hong kong, peoples r china. [sun, zhenhua] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;tian, lw (reprint author), chinese univ hong kong, sch publ hlth & primary care, shatin, hong kong, peoples r china;linweit@cuhk.edu.hk jfwang@phy.cuhk.edu.hk
关键词	Seed-mediated Growth Refractive-index Aspect Ratio Core-shell Scattering Nanoparticles Absorption Shape Size Nanocrystals
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WOS记录号	WOS:000293190200015
引用统计	被引频次：27[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30240
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. H. Bao,Z. H. Sun,M. D. Xiao,et al. Transverse oxidation of gold nanorods assisted by selective end capping of silver oxide[J]. Journal of Materials Chemistry,2011,21(31):11537-11543.
APA	Z. H. Bao,Z. H. Sun,M. D. Xiao,H. J. Chen,L. W. Tian,&J. F. Wang.(2011).Transverse oxidation of gold nanorods assisted by selective end capping of silver oxide.Journal of Materials Chemistry,21(31),11537-11543.
MLA	Z. H. Bao,et al."Transverse oxidation of gold nanorods assisted by selective end capping of silver oxide".Journal of Materials Chemistry 21.31(2011):11537-11543.

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