title: Self-assembly of Au-Ag alloy nanoparticles by thermal annealing.
abstract: Hemispherical Au-Ag alloy nanoparticles were prepared on 2-inch Si wafer by thermal annealing Au-Ag alloy thin film in protective ambient. The nanoparticles were evenly distributed on the substrate surface. The diameter of the nanoparticles is dependent of the deposition duration of the Au-Ag alloy thin film, and also the separation between the nanoparticles. The minimum and maximum diameters of the nanoparticles obtained so far are about 5 nm and 160 nm, respectively. Experimental evidences indicated that the formation of the hemispherical nanoparticles is due to the surface tensile stressing induced by the lattice expansion.
authors.affiliation: State Key Lab of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Materials and Technologies, and School of Physics and Engineering, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, People's Republic of China.
authors.forename: R H
authors.initials: RH
authors.lastname: Yao
authors.forename: J C
authors.initials: JC
authors.lastname: She
authors.forename: N S
authors.initials: NS
authors.lastname: Xu
authors.forename: S Z
authors.initials: SZ
authors.lastname: Deng
authors.forename: Jun
authors.initials: J
authors.lastname: Chen