title: One-step large-scale synthesis of micrometer-sized silver nanosheets by a template-free electrochemical method.
abstract: We have synthesized micrometer-sized Ag nanosheets via a facile, one-step, template-free electrochemical deposition in an ultra-dilute silver nitrate aqueous electrolyte. The nanosheet growth was revealed to occur in three stages: (1) formation of polygonal Ag nuclei on a substrate, (2) growth of {112}-faceted nanowire from the nuclei, and (3) anisotropic growth of (111)-planar nanosheets, approximately 20 to 50 nm in thickness and 10 μm in width, in the <112>-direction. The vertical growth of the facet nanowire was induced by the strong interface anisotropy between the deposit and electrolyte due to the ultra-dilute concentration of electrolyte and high reduction potential. The thickness of Ag nanosheets was controllable by the adjustment of the reduction/oxidation potential and frequency of the reverse-pulse potentiodynamic mode.
authors.affiliation: University of Science and Technology, Daejeon 305-350, Republic of Korea. jysong@kriss.re.kr.
authors.forename: Sun Hwa
authors.initials: SH
authors.lastname: Park
authors.forename: Jin Gyeong
authors.initials: JG
authors.lastname: Son
authors.forename: Tae Geol
authors.initials: TG
authors.lastname: Lee
authors.forename: Hyun Min
authors.initials: HM
authors.lastname: Park
authors.forename: Jae Yong
authors.initials: JY
authors.lastname: Song