Controlled synthesis of gold nanobelts and nanocombs in aqueous mixed surfactant solutions.

Controlled synthesis of gold nanobelts and nanocombs in aqueous mixed surfactant solutions. Research Abstract Details 

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Controlled synthesis of gold nanobelts and nanocombs in aqueous mixed surfactant solutions. Abstract Text:

Nana Zhao,Yang Wei,Nijuan Sun,Qian Chen,Jingwei Bai,Longping Zhou,Yao Qin,Meixian Li,Limin Qi,Nana Zhao,Yang Wei,Nijuan Sun,Qian Chen,Jingwei Bai,Longping Zhou,Yao Qin,Meixian Li,Limin Qi,

Well-defined gold nanobelts as well as unique gold nanocombs made of nanobelts were readily synthesized by the reduction of HAuCl4 with ascorbic acid in aqueous mixed solutions of the cationic surfactant cetyltrimethylammonium bromide (CTAB) and the anionic surfactant sodium dodecylsulfonate (SDSn). Single-crystalline gold nanobelts grown along the <110> and <211> directions were prepared in mixed CTAB-SDSn solutions at 4 and 27 degrees C, respectively. Furthermore, single-crystalline gold nanocombs consisting of a <110>-oriented stem nanobelt and numerous <211>-oriented nanobelts grown perpendicularly on one side of the stem were fabricated by a two-step process with temperature changing from 4 to 27 degrees C. It was proposed that the mixed cationic-anionic surfactants exerted a subtle control on the growth of gold nanocrystals in solution due to the cooperative effect of mixed surfactants. This synthetic strategy may open a new route for the mild fabrication and hierarchical assembly of metal nanobelts in solution. The obtained gold nanobelts showed good electrocatalytic activity toward the oxidation of methanol in alkaline solution; in particular, the electrode modified with the nanobelts obtained at 27 degrees C exhibited an electrocatalytic activity considerably higher than normal polycrystalline gold electrode. Moreover, the gold nanobelts were used as the surface-enhanced Raman scattering (SERS) substrate for detecting the enhanced Raman spectra of p-aminothiophenol (PATP) molecules, and the gold nanobelts obtained at 4 degrees C exhibited an unusual larger enhancement of the b2 modes relative to the a1 modes for the adsorbed PATP molecules.

Controlled synthesis of gold nanobelts and nanocombs in aqueous mixed surfactant solutions. Publishing Authors By Initials

N Zhao,Y Wei,N Sun,Q Chen,J Bai,L Zhou,Y Qin,M Li,L Qi,N Zhao,Y Wei,N Sun,Q Chen,J Bai,L Zhou,Y Qin,M Li,L Qi,

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Controlled synthesis of gold nanobelts and nanocombs in aqueous mixed surfactant solutions. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Langmuir : the ACS journal of surfaces and colloid

VOLUME: 24

Page Numbers: 991-8

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ISSN: 0743-7463

DAY: 4

MONTH: 01

YEAR: 2008

Controlled synthesis of gold nanobelts and nanocombs in aqueous mixed surfactant solutions. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Controlled synthesis of gold nanobelts and nanocombs in aqueous mixed surfactant solutions.

AFFILIATION: Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry, Peking University, Beijing 100871, P. R. China.

Country: United States

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MEDLINETA: Langmuir

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