title: Evolution of dendritic platinum nanosheets into ripening-resistant holey sheets.
abstract: Under electron-beam irradiation, dendritic platinum nanosheets structurally evolve into metastable "holey" nanosheets. Monte Carlo simulations of this structural transformation agree well with electron microscope images detailing the ripening process. The experiments and simulations show that nanoscale holes of a critical size are persistent and give holey sheets their morphological stability and sustained high surface area. Platinum nanostructures composed of these holey nanosheets exhibit improved durability in electrocatalytic reactions due to their remarkable ripening resistance.
authors.affiliation: Advanced Materials Laboratory, Sandia National Laboratories, Albuquerque, New Mexico 87185-1349, USA.
authors.forename: Yujiang
authors.initials: Y
authors.lastname: Song
authors.forename: Michael A
authors.initials: MA
authors.lastname: Hickner
authors.forename: Sivakumar R
authors.initials: SR
authors.lastname: Challa
authors.forename: Rachel M
authors.initials: RM
authors.lastname: Dorin
authors.forename: Robert M
authors.initials: RM
authors.lastname: Garcia
authors.forename: Haorong
authors.initials: H
authors.lastname: Wang
authors.forename: Ying-Bing
authors.initials: YB
authors.lastname: Jiang
authors.forename: Peng
authors.initials: P
authors.lastname: Li
authors.forename: Yan
authors.initials: Y
authors.lastname: Qiu
authors.forename: Frank
authors.initials: F
authors.lastname: van Swol
authors.forename: Craig J
authors.initials: CJ
authors.lastname: Medforth
authors.forename: James E
authors.initials: JE
authors.lastname: Miller
authors.forename: Tochi
authors.initials: T
authors.lastname: Nwoga
authors.forename: Kazuo
authors.initials: K
authors.lastname: Kawahara
authors.forename: Wen
authors.initials: W
authors.lastname: Li
authors.forename: John A
authors.initials: JA
authors.lastname: Shelnutt