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题名:
Controllable synthesis of three-dimensional branched gold nanocrystals assisted by cationic surfactant poly(diallyldimethylammonium) chloride in acidic aqueous solution
作者: Zhang, Haibin; Lu, Yonggang; Liu, Hong; Fang, Jingzhong
刊名: RSC Advances
出版日期: 2014
卷号: 4, 期号:69, 页码:36757-36764
学科分类: Cationic surfactants - Chlorine compounds - Morphology - Nanocrystals - Plasmons - Solutions - Surface scattering
DOI: 10.1039/c4ra07535h
通讯作者: Zhang, H. (zhb@ioe.ac.cn)
文章类型: 期刊论文
中文摘要: An effective strategy for the controllable synthesis of single crystalline branched gold nanocrystals with a three-dimensional hierarchical structure was realized via the reduction of tetrachloroaurate ions (AuCl4 -) assisted by the cationic surfactant poly(diallyldimethylammonium) chloride (PDDA) in acidic aqueous solution. The as-prepared gold nanostructures consisting of main trunks and almost symmetrical side branches presented a [111] plane and growth along the 〈331〉 direction. The PDDA and weak reducing agent, ascorbic acid (AA), were indispensable for the formation of these unique gold nanocrystals. The effects of HAuCl4 (or PDDA) concentrations, pH values and reaction temperatures on the morphology of branched gold nanocrystals are discussed in our work. A possible three-staged formation mechanism of initial branched nucleation, subsequent branched nanostructure growth and the final morphology adjustment was proposed on the basis of different reaction times and the corresponding changes in surface plasmon absorption. It is expected that the specific branched gold nanocrystals may find potential applications such as in optoelectronics, surface enhanced Raman scattering (SERS) and surface plasmonics. © the Partner Organisations 2014.
英文摘要: An effective strategy for the controllable synthesis of single crystalline branched gold nanocrystals with a three-dimensional hierarchical structure was realized via the reduction of tetrachloroaurate ions (AuCl4 -) assisted by the cationic surfactant poly(diallyldimethylammonium) chloride (PDDA) in acidic aqueous solution. The as-prepared gold nanostructures consisting of main trunks and almost symmetrical side branches presented a [111] plane and growth along the 〈331〉 direction. The PDDA and weak reducing agent, ascorbic acid (AA), were indispensable for the formation of these unique gold nanocrystals. The effects of HAuCl4 (or PDDA) concentrations, pH values and reaction temperatures on the morphology of branched gold nanocrystals are discussed in our work. A possible three-staged formation mechanism of initial branched nucleation, subsequent branched nanostructure growth and the final morphology adjustment was proposed on the basis of different reaction times and the corresponding changes in surface plasmon absorption. It is expected that the specific branched gold nanocrystals may find potential applications such as in optoelectronics, surface enhanced Raman scattering (SERS) and surface plasmonics. © the Partner Organisations 2014.
收录类别: SCI ; Ei
语种: 英语
WOS记录号: WOS:000341363200049
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/6939
Appears in Collections:轻量化中心_期刊论文

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作者单位: Lightweight Optics and Advanced Materials Center, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China

Recommended Citation:
Zhang, Haibin,Lu, Yonggang,Liu, Hong,et al. Controllable synthesis of three-dimensional branched gold nanocrystals assisted by cationic surfactant poly(diallyldimethylammonium) chloride in acidic aqueous solution[J]. RSC Advances,2014,4(69):36757-36764.
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