title: Three-dimensional GaN-Ga2O3 core shell structure revealed by x-ray diffraction microscopy.
abstract: In combination of direct phase retrieval of coherent x-ray diffraction patterns with a novel tomographic reconstruction algorithm, we, for the first time, carried out quantitative 3D imaging of a heat-treated GaN particle with each voxel corresponding to 17 x 17 x 17 nm3. We observed the platelet structure of GaN and the formation of small islands on the surface of the platelets, and successfully captured the internal GaN-Ga2O3 core shell structure in three dimensions. This work opens the door for nondestructive and quantitative imaging of 3D morphology and 3D internal structure of a wide range of materials at the nanometer scale resolution that are amorphous or possess only short-range atomic organization.
authors.affiliation: Department of Physics and Astronomy and California NanoSystems Institute, University of California, Los Angeles, California 90095, USA.
authors.forename: Jianwei
authors.initials: J
authors.lastname: Miao
authors.forename: Chien-Chun
authors.initials: CC
authors.lastname: Chen
authors.forename: Changyong
authors.initials: C
authors.lastname: Song
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Nishino
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Kohmura
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Ishikawa
authors.forename: Damien
authors.initials: D
authors.lastname: Ramunno-Johnson
authors.forename: Ting-Kuo
authors.initials: TK
authors.lastname: Lee
authors.forename: Subhash H
authors.initials: SH
authors.lastname: Risbud