title: Fabrication of nanorattles with passive shell.
abstract: This investigation describes the formation of a metal nanorattle with a pure metal shell by varying experimental parameters. The galvanic replacement reaction between silver and chloroauric acid was adopted to prepare hollow metal nanoparticles. This approach is extended to produce nanorattles of Au cores and Au shells by starting with Au(core)Ag(shell) nanoparticles as templates. The effect of temperature on the nanostructure of the final product is also considered. The composition of the shell in nanorattles can be controlled by varying the reaction temperature (to form pure gold or gold-silver alloy, for example). X-ray absorption fine structure spectroscopy is conducted to elucidate the fine structure of these nanoparticles. Partial alloying between the Au core and the Ag shell is observed by extended X-ray absorption fine structure (EXAFS).
authors.affiliation: Department of Chemistry, National Taiwan University, Taipei 106, Taiwan.
authors.forename: Hao Ming
authors.initials: HM
authors.lastname: Chen
authors.forename: Ru-Shi
authors.initials: RS
authors.lastname: Liu
authors.forename: Kiyotaka
authors.initials: K
authors.lastname: Asakura
authors.forename: Jyh-Fu
authors.initials: JF
authors.lastname: Lee
authors.forename: Ling-Yun
authors.initials: LY
authors.lastname: Jang
authors.forename: Shu-Fen
authors.initials: SF
authors.lastname: Hu