title: In situ atomic imaging of coalescence of Au nanoparticles on graphene: rotation and grain boundary migration.
abstract: Using in situ transmission electron microscopy, we demonstrated that gold nanoparticles are unified via "oriented attachment" assisted either by nanoparticle rotation or grain boundary migration at the attachment interface. We also observed that the combined nanoparticle changes shape with stable facet planes via surface diffusion, along with recrystallization.
authors.affiliation: Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 305-701, Korea. j.y.lee@kaist.ac.kr.
authors.forename: Jong Min
authors.initials: JM
authors.lastname: Yuk
authors.forename: Myoungho
authors.initials: M
authors.lastname: Jeong
authors.forename: Sang Yun
authors.initials: SY
authors.lastname: Kim
authors.forename: Hyeon Kook
authors.initials: HK
authors.lastname: Seo
authors.forename: Jihyun
authors.initials: J
authors.lastname: Kim
authors.forename: Jeong Yong
authors.initials: JY
authors.lastname: Lee