title: Interfacial double layer mediated electrochemical growth of thin-walled platinum nanotubes.
abstract: This work demonstrates that thin-walled platinum nanotubes can be readily synthesized by controlling the interfacial double layer in alumina nanochannels. The gradient distribution of ions in nanochannels enables the creation of Pt nanotubes with walls as thin as 5 nm at the top end when using a solution containing polyvinylpyrrolidone (PVP) and chloroplatinic acid (H2PtCl6) under the influence of an electric potential in nanochannels. The highly efficient formation of thin-walled Pt nanotubes is a result of the concentration gradient of [Formula: see text] and a thick double layer, which was caused by the low concentration of Pt precursors and the enhanced surface charge density induced by protonated PVP steric adsorption. This well-controlled synthesis reveals that the interfacial double layer is a useful tool to tailor the structure of nanomaterials in a nanoscale space, and holds promise in the construction of more complex functional nanostructures.
authors.affiliation: Department of Chemistry and Department of Energy Science, Sungkyunkwan University, Suwon 440-746, Korea. College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, 314001, People's Republic of China.
authors.forename: Liqiu
authors.initials: L
authors.lastname: Zhang
authors.forename: Sang Min
authors.initials: SM
authors.lastname: Kim
authors.forename: Sanghyun
authors.initials: S
authors.lastname: Cho
authors.forename: Hee-Jeong
authors.initials: HJ
authors.lastname: Jang
authors.forename: Lichun
authors.initials: L
authors.lastname: Liu
authors.forename: Sungho
authors.initials: S
authors.lastname: Park