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Title of Journal: J Nanopart Res

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Abbravation: Journal of Nanoparticle Research

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Springer Netherlands

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DOI

10.1007/s10870-006-9146-9

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1572-896X

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Convenient approaches for the synthesis of gold na

Authors: Daigou Mizoguchi Masato Murouchi Hiroki Hirata Yoshiaki Takata Yasuro Niidome Sunao Yamada
Publish Date: 2011/09/10
Volume: 13, Issue: 12, Pages: 6297-6303
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Abstract

In spite that several empirical approaches for the synthesis of gold nanowires have been reported there still remains ambiguity and controversy for their mechanisms In this study we report very easy and highlyreproducible synthetic method of gold Au nanowires with the size and the length of 40–50 nm and several micrometers respectively The method includes an extremely higher concentration of hexadecyltrimethylammonium bromide CTAB at room temperature We successively used two kinds of reducing agents firstly sodium borohydride for the reduction of AuIII ion into mostly AuI ion and secondly triethylamine TEA leading AuI ion to Au0 and its growth to Au nanowires The former should be added very slowly while the latter at once Effects of oxygen were crucial for the growth to nanowires and copper ion was quite effective for reductive scavenging of unwanted oxygen It is strongly suggested that CuI ion first generates the complex with TEA and then reduces AuI ion to AuO Thus the Au nanowires grow in higher concentrations of CuI ion The concentration of CTAB was also found to be very important for the generation of Au nanowires

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