Issue 8, 2010
From the journal:

Nanoscale

Field-assisted synthesis of SERS-active silver nanoparticles using conducting polymers†

Ping Xu,*ab   Sea-Ho Jeon,a   Nathan H. Mack,a   Stephen K. Doorn,a   Darrick J. Williams,a   Xijiang Hanb  and  Hsing-Lin Wang*a  

* Corresponding authors

a C-PCS, Los Alamos National Laboratory, Los Alamos, USA
E-mail: hwang@lanl.gov

b Department of Chemistry, Harbin Institute of Technology, Harbin 150001, China
E-mail: pxu@hit.edu.cn

Abstract

A gradient of novel silver nanostructures with widely varying sizes and morphologies is fabricated on a single conducting polyaniline–graphite (P-G) membrane with the assistance of an external electric field. It is believed that the formation of such a silver gradient is a synergetic consequence of the generation of a silver ion concentration gradient along with an electrokinetic flow of silver ions in the field-assisted model, which greatly influences the nucleation and growth mechanism of Ag particles on the P-G membrane. The produced silver dendrites, flowers and microspheres, with sharp edges, intersections and bifurcations, all present strong surface enhanced Raman spectroscopy (SERS) responses toward an organic target molecule, mercaptobenzoic acid (MBA). This facile field-assisted synthesis of Ag nanoparticles via chemical reduction presents an alternative approach to nanomaterial fabrication, which can yield a wide range of unique structures with enhanced optical properties that were previously inaccessible by other synthetic routes.

Graphical abstract: Field-assisted synthesis of SERS-active silver nanoparticles using conducting polymers

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Article information

DOI
https://doi.org/10.1039/C0NR00106F
Article type
Paper
Submitted
10 Feb 2010
Accepted
29 Mar 2010
First published
04 Jun 2010

Nanoscale, 2010,2, 1436-1440

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Field-assisted synthesis of SERS-active silver nanoparticles using conducting polymers

P. Xu, S. Jeon, N. H. Mack, S. K. Doorn, D. J. Williams, X. Han and H. Wang, Nanoscale, 2010, 2, 1436 DOI: 10.1039/C0NR00106F

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