Stacking faults enriched silver nanowires: facile synthesis, catalysis and SERS investigations

Minmin Xu; Fengzhu Yang; Yaxian Yuan; Qinghua Guo; Bin Ren; Jianlin Yao; Renao Gu

doi:10.1016/j.jcis.2013.05.070

Stacking faults enriched silver nanowires: facile synthesis, catalysis and SERS investigations

J Colloid Interface Sci. 2013 Oct 1:407:60-6. doi: 10.1016/j.jcis.2013.05.070. Epub 2013 Jun 13.

Authors

Minmin Xu¹, Fengzhu Yang, Yaxian Yuan, Qinghua Guo, Bin Ren, Jianlin Yao, Renao Gu

Affiliation

¹ College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.

PMID: 23830286
DOI: 10.1016/j.jcis.2013.05.070

Abstract

A facile approach based on seed-mediated method for synthesis of stacking faults enriched Ag nanowires (SFEANWs) was successfully developed. SFEANWs were formed and attached onto the seed (α-Fe2O3/Au) surfaces through the reduction of AgNO3 by ascorbic acid (AA) in the presence of sodium polyacrylate (PAANa). Their length can be tuned with different concentrations of AgNO3 or PAANa. According to the effects of seeds and PAANa, the plausible growth mechanism of SFEANWs was discussed. The catalytic activity of SFEANWs comparing with fivefold twinned Ag nanowires (FFTANWs) was evaluated through reducing p-nitrophenol by NaBH4. The activation energy of the classical reaction catalyzed by SFEANWs was calculated through the Arrhenius equation. In addition, these SFEANWs exhibited excellent surface enhanced Raman scattering (SERS) activities due to the hot spots located in the cross of the twist wires. The detection limit of by SERS for 1,4-benzenedithiol (1,4-BDT) was estimated about 10(-7) mol/L.

Keywords: Ag nanowires; Catalytic activity; Seed-mediated method; Stacking faults; Surface enhanced Raman scattering.