title: Superplastic deformation of defect-free Au nanowires via coherent twin propagation.
abstract: We report that defect-free Au nanowires show superplasticity on tensile deformation. Evidences from high-resolution electron microscopes indicated that the plastic deformation proceeds layer-by-layer in an atomically coherent fashion to a long distance. Furthermore, the stress-strain curve provides full interpretation of the deformation. After initial superelastic deformation, the nanowire shows superplastic deformation induced by coherent twin propagation, completely reorientating the crystal from <110> to <100>. Uniquely well-disciplined and long-propagating atomic movements deduced here are ascribed to the superb crystallinity as well as the radial confinement of the Au nanowires.
authors.affiliation: Nano Analysis Center, KIST, Seoul 130-650, Korea.
authors.forename: Jong-Hyun
authors.initials: JH
authors.lastname: Seo
authors.forename: Youngdong
authors.initials: Y
authors.lastname: Yoo
authors.forename: Na-Young
authors.initials: NY
authors.lastname: Park
authors.forename: Sang-Won
authors.initials: SW
authors.lastname: Yoon
authors.forename: Hyoban
authors.initials: H
authors.lastname: Lee
authors.forename: Sol
authors.initials: S
authors.lastname: Han
authors.forename: Seok-Woo
authors.initials: SW
authors.lastname: Lee
authors.forename: Tae-Yeon
authors.initials: TY
authors.lastname: Seong
authors.forename: Seung-Cheol
authors.initials: SC
authors.lastname: Lee
authors.forename: Kon-Bae
authors.initials: KB
authors.lastname: Lee
authors.forename: Pil-Ryung
authors.initials: PR
authors.lastname: Cha
authors.forename: Harold S
authors.initials: HS
authors.lastname: Park
authors.forename: Bongsoo
authors.initials: B
authors.lastname: Kim
authors.forename: Jae-Pyoung
authors.initials: JP
authors.lastname: Ahn