Electrochemical synthesis of hexadecyltrimethylammonium-coated Ag nanopeanuts and their self-assembly to nanonets

A novel and simple electrochemical method for preparing Ag nanopeanuts has been developed. These peanut-shaped nanoparticles are electroreduced in an aqueous solution containing adsorbed hexadecyltrimethylammonium ions (CTA +) without a counter ion, Br −. For electroreduction, the electrical double...

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Bibliographic Details
Published in:Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2010-04, Vol.358 (1), p.158-162
Main Authors: Lee, Chien-Liang, Syu, Ciou-Mei
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Doppler effect
Double layer
Electrochemistry
Exact sciences and technology
General and physical chemistry
Micelles
Nanocomposites
Nanomaterials
Nanostructure
Nanowires
Organization
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Self assembly
Silver
Surface physical chemistry
Surface plasmon resonance
Surfactant
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Summary:A novel and simple electrochemical method for preparing Ag nanopeanuts has been developed. These peanut-shaped nanoparticles are electroreduced in an aqueous solution containing adsorbed hexadecyltrimethylammonium ions (CTA +) without a counter ion, Br −. For electroreduction, the electrical double layer of CTA + micelle has to be regulated. As the aging time increases, the structure of the CTA + micelle changes; this causes the Ag nanopeanuts to assemble via a one-dimensional (1-D) process. Finally, Ag nanonets are obtained. Linear assembly results in a change in the optical properties, such as a red shift in the longitudinal surface plasmon resonance band. Additionally, as an information supported by electrochemical measurement, the newly Ag nanonets as alcohol-tolerant catalysts show high activity toward oxygen reduction.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2010.01.045