Jump to main content
Jump to site search

Issue 48, 2015
Previous Article Next Article

The alloying effect and AgCl-directing growth for synthesizing a trimetallic nanoring with improved SERS

Author affiliations

Abstract

We report the synthesis of high quality trimetallic Au/Ag/Pt nanorings (TAAPNs) by using Au/Ag alloy decahedra (AAAD) as templates. The alloying effect and AgCl-directing growth have been investigated in detail during the formation of TAAPN. It was found that the doping of Ag in AAAD changes the surrounding environment of Au atoms and decreases the oxidization reduction potential (ORP) of [AuCl2]/Au because of the alloying effect, resulting in the dissolved O2 molecules that serve as an effective etchant for oxidizing Au to Au(I). Ascorbic acid (AA) and chloroplatinic acid (H2PtCl6) are weak acids which can accelerate the etching by increasing the concentration of H+. The AgCl selectively absorbs on {100} of the decahedra and induces the preferential deposition of H2PtCl6 here via their complexing interaction. AA reduces Pt(IV) and Ag(I) to atoms which grow on {100} facets. The formed Pt/Ag layer changes the etching direction from along [100] to [111] and generates the TAAPN. Besides, it has been noted that the TAAPNs exhibit good Surface Enhanced Raman Scattering (SERS) performance.

Graphical abstract: The alloying effect and AgCl-directing growth for synthesizing a trimetallic nanoring with improved SERS

Back to tab navigation

Supplementary files

Article information


Submitted
15 Aug 2015
Accepted
26 Sep 2015
First published
02 Oct 2015

Nanoscale, 2015,7, 20414-20425
Article type
Paper

The alloying effect and AgCl-directing growth for synthesizing a trimetallic nanoring with improved SERS

S. Han, G. Zhou, Y. Fu, Y. Ma, L. Xu, C. Zou, W. Chen, Y. Yang and S. Huang, Nanoscale, 2015, 7, 20414
DOI: 10.1039/C5NR05531H

Social activity

Search articles by author

Spotlight

Advertisements