title: Electrostatic self-assembling formation of Pd superlattice nanowires from surfactant-free ultrathin Pd nanosheets.
abstract: A facile method has been developed for face-to-face assembly of two-dimensional surfactant-free Pd nanosheets into one-dimensional Pd superlattice nanowires. The length of the Pd nanowires can be well controlled by introducing cations of different concentration and charge density. Our studies reveal that cations with higher charge density have stronger charge-screening ability, and their introduction leads to more positive zeta-potential and decreased electrostatic repulsion between negatively charged Pd nanosheets. Moreover, their surfactant-free feature is of great importance in assembling the Pd nanosheets into superlattice nanowires. While the cations are important for the assembly of Pd nanosheets, the use of poly(vinylpyrrolidone) is necessary to enhance the stability of the assembled superlattice nanowires. The as-assembled segmented Pd nanowires display tunable surface plasmon resonance features and excellent hydrogen-sensing properties.
authors.affiliation: State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China.
authors.forename: Chengyi
authors.initials: C
authors.lastname: Hu
authors.forename: Kaiqiang
authors.initials: K
authors.lastname: Lin
authors.forename: Xingli
authors.initials: X
authors.lastname: Wang
authors.forename: Shengjie
authors.initials: S
authors.lastname: Liu
authors.forename: Jun
authors.initials: J
authors.lastname: Yi
authors.forename: Yu
authors.initials: Y
authors.lastname: Tian
authors.forename: Binghui
authors.initials: B
authors.lastname: Wu
authors.forename: Guangxu
authors.initials: G
authors.lastname: Chen
authors.forename: Huayan
authors.initials: H
authors.lastname: Yang
authors.forename: Yan
authors.initials: Y
authors.lastname: Dai
authors.forename: Huan
authors.initials: H
authors.lastname: Li
authors.forename: Nanfeng
authors.initials: N
authors.lastname: Zheng