title: Nanoparticle growth. Facet development during platinum nanocube growth.
abstract: An understanding of how facets of a nanocrystal develop is critical for controlling nanocrystal shape and designing novel functional materials. However, the atomic pathways of nanocrystal facet development are mostly unknown because of the lack of direct observation. We report the imaging of platinum nanocube growth in a liquid cell using transmission electron microscopy with high spatial and temporal resolution. The growth rates of all low index facets are similar until the {100} facets stop growth. The continuous growth of the rest facets leads to a nanocube. Our calculation shows that the much lower ligand mobility on the {100} facets is responsible for the arresting of {100} growing facets. These findings shed light on nanocrystal shape-control mechanisms and future design of nanomaterials.
authors.affiliation: Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors.forename: Hong-Gang
authors.initials: HG
authors.lastname: Liao
authors.affiliation: Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors.forename: Danylo
authors.initials: D
authors.lastname: Zherebetskyy
authors.affiliation: Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors.forename: Huolin
authors.initials: H
authors.lastname: Xin
authors.affiliation: Gatan, Incorporated, 5794 West Las Positas Boulevard, Pleasanton, CA 94588, USA.
authors.forename: Cory
authors.initials: C
authors.lastname: Czarnik
authors.affiliation: National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors.forename: Peter
authors.initials: P
authors.lastname: Ercius
authors.affiliation: Department of Structural Biology, Medical School, Stanford University, Stanford, CA 94305, USA.
authors.forename: Hans
authors.initials: H
authors.lastname: Elmlund
authors.affiliation: Gatan, Incorporated, 5794 West Las Positas Boulevard, Pleasanton, CA 94588, USA.
authors.forename: Ming
authors.initials: M
authors.lastname: Pan
authors.affiliation: Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors.forename: Lin-Wang
authors.initials: LW
authors.lastname: Wang
authors.affiliation: Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. Department of Material Science and Engineering, University of California, Berkeley, CA 94720, USA. hmzheng@lbl.gov.
authors.forename: Haimei
authors.initials: H
authors.lastname: Zheng