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Preparation of Ag/Au bimetallic nanostructures and their application in surface‐enhanced fluorescence
Author(s) -
Dong Jun,
Ye Yanyan,
Zhang Wenhui,
Ren Zebin,
Huo Yiping,
Zheng Hairong
Publication year - 2015
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2863
Subject(s) - bimetallic strip , rhodamine 6g , nanostructure , fluorescence , substrate (aquarium) , materials science , copper , galvanic cell , nanoclusters , nanotechnology , chemical engineering , chemistry , inorganic chemistry , molecule , metal , organic chemistry , metallurgy , physics , oceanography , engineering , geology , quantum mechanics
An effective substrate for surface‐enhanced fluorescence, which consists of cluster Ag/Au bimetallic nanostructures on a copper surface, was synthesized via a multi‐stage galvanic replacement reaction of a Ag cluster in a chlorauric acid (HAuCl 4 ) solution at room temperature. The fabricated silver/gold bimetallic cluster were found to yield large surface‐enhanced fluorescence (SEF) enhancement factors for rhodamine 6G probe molecules deposited on the substrate, and also the fluorescence efficiency is critically dependent on the period of nanostructure growth. With the help of proper control reaction conditions, such as the reaction time, and concentration of reaction solutions, the maximum fluorescence enhanced effect was obtained. Therefore, the bimetallic nanostructure substrate also can be adapted to studies in SEF, which will expand the application of SEF. Copyright © 2015 John Wiley & Sons, Ltd.