title: Preparation of Ag/Au bimetallic nanostructures and their application in surface-enhanced fluorescence.
abstract: 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 (HAuCl4) 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.
authors.affiliation: School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710062, China.|School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an, 710121, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Dong
authors.affiliation: School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710062, China.
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Ye
authors.affiliation: School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710062, China.
authors.forename: Wenhui
authors.initials: W
authors.lastname: Zhang
authors.affiliation: School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710062, China.
authors.forename: Zebin
authors.initials: Z
authors.lastname: Ren
authors.affiliation: School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710062, China.
authors.forename: Yiping
authors.initials: Y
authors.lastname: Huo
authors.affiliation: School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710062, China.
authors.forename: Hairong
authors.initials: H
authors.lastname: Zheng
mesh_terms: D000497:Alloys / Q000138:chemical synthesis / Q000737:chemistry*; D003300:Copper / Q000737:chemistry; D005453:Fluorescence; D006046:Gold / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000497:Alloys; D012834:Silver; D006046:Gold; D003300:Copper
keywords: bimetallic nanostructure; enhanced fluorescence; local surface plasmon