title: The IP₆ micelle-stabilized small Ag cluster for synthesizing Ag-Au alloy nanoparticles and the tunable surface plasmon resonance effect.
abstract: The stable small Ag seeds (size in diameter < 10 nm) were obtained in the presence of inositol hexakisphosphoric (IP₆) micelles. Then Ag-Au bimetallic nanoparticles were synthesized through a replacement reaction with the rapid interdiffusion process between such small Ag seeds in nanoclusters and HAuCl₄. Adjusting the dosage of HAuCl₄ resulted in different products, which possessed unique surface plasmon resonances (SPR). The morphologies of the as-made nanoparticles were observed using transmission electron microscopy and field emission scanning electron microscopy and their compositions were determined by energy-dispersive x-ray spectroscopy. Among them, the Ag-Au alloy nanoparticles with the cauliflower-like structure had a suitable SPR for highly sensitive Raman detection application as a surface-enhanced Raman scattering (SERS) substrate with a long-term stability of six months.
authors.affiliation: Department of Chemistry, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, People's Republic of China.
authors.forename: Na
authors.initials: N
authors.lastname: Wang
authors.forename: Ying
authors.initials: Y
authors.lastname: Wen
authors.forename: Yao
authors.initials: Y
authors.lastname: Wang
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.forename: Xiyao
authors.initials: X
authors.lastname: Chen
authors.forename: Bo
authors.initials: B
authors.lastname: Ling
authors.forename: Shuangyan
authors.initials: S
authors.lastname: Huan
authors.forename: Haifeng
authors.initials: H
authors.lastname: Yang
mesh_terms: D000497:Alloys / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D008823:Micelles; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D010316:Particle Size; D010833:Phytic Acid / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D020349:Surface Plasmon Resonance
chemical_list: D000497:Alloys; D008823:Micelles; D012834:Silver; D006046:Gold; D010833:Phytic Acid