title: AuAg bimetallic nanoparticles film fabricated based on H2O2-mediated silver reduction and its application.
abstract: A method to fabricate AuAg bimetallic nanoparticles film by H(2)O(2)-mediated reduction of silver was reported. Gold nanoparticles (Au NPs) were first adsorbed onto the surface of a self-assembled 2-aminoethanethiol monolayer-modified gold film or 3-aminopropyltriethoxysilane (APTES) monolayer-modified quartz slide. Upon further treatment of this modified film with the solution containing silver nitrate (AgNO(3)) and H(2)O(2), silver was deposited on the surface of Au NPs. The size of the AuAg bimetallic particles could be readily tuned by manipulating the concentration of H(2)O(2). Surface plasmon resonance (SPR) was used to investigate the process, the deposition of silver on Au NPs modified gold film resulted in an obvious decrease of depth in the SPR reflectance intensity and minimum angle curves (SPR R-theta curves), which may be utilized for the quantitative SPR detection of the analyte, H(2)O(2). Combination of the biocatalytic reaction that could yield H(2)O(2) by using the enzyme, glucose oxidase, with the deposition of silver may enable the design of a glucose biosensor by SPR technique. Furthermore, we evaluated the AuAg bimetallic nanoparticles film for their ability to be an effective substrate for surface-enhanced Raman scattering (SERS).
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renming Street 5625, Changchun, Jilin 130022, China.
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.forename: Fuan
authors.initials: F
authors.lastname: Wang
authors.forename: Li
authors.initials: L
authors.lastname: Shang
authors.forename: Chengzhou
authors.initials: C
authors.lastname: Zhu
authors.forename: Wen
authors.initials: W
authors.lastname: Ren
authors.forename: Shaojun
authors.initials: S
authors.lastname: Dong
mesh_terms: D000497:Alloys / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000032:analysis / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D010084:Oxidation-Reduction; D012834:Silver / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013059:Spectrum Analysis, Raman; D020349:Surface Plasmon Resonance; D014961:X-Ray Diffraction
chemical_list: D000497:Alloys; D012834:Silver; D006046:Gold; D006861:Hydrogen Peroxide