title: Noble-metal Ag nanoparticle chains: annealing Ag/Bi superlattice nanowires in vacuum.
abstract: One-dimensional noble-metal Ag nanoparticle chains have been prepared by electrodepositing Ag/Bi superlattice nanowires in a porous anodic alumina oxide (AAO) template and following an annealing process in vacuum. It is found that Bi, as a sacrificial metal, can be removed completely after annealing at 450 °C with a vacuum degree of 10(-5) Torr. The regulation of particle size, shape and interparticle spacing of Ag NP chains has been realized by adjusting the segment length of the Ag/Bi superlattice nanowires and the annealing condition. With an extension of the annealing time, it is observed that Ag particles display the transform trend from ellipsoid to sphere. Our findings could inspire further investigation on the design and fabrication of metal nanoparticle chains.
authors.affiliation: Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, PO Box 1129, Hefei, 230031, People's Republic of China.
authors.forename: Shao Hui
authors.initials: SH
authors.lastname: Xu
authors.forename: Guang Tao
authors.initials: GT
authors.lastname: Fei
authors.forename: Qiao
authors.initials: Q
authors.lastname: You
authors.forename: Xu Dong
authors.initials: XD
authors.lastname: Gao
authors.forename: Peng Cheng
authors.initials: PC
authors.lastname: Huo
authors.forename: Li
authors.initials: L
authors.lastname: De Zhang