title: Cubic to tetragonal phase transformation in cold-compressed Pd nanocubes.
abstract: Pd nanocubes with an average side length of approximately 10 nm were compressed up to 24.8 GPa in a diamond-anvil cell (DAC). In situ synchrotron X-ray diffraction was used to monitor structural changes, and a face-centered cubic (fcc) to face-centered tetragonal (fct) distortion was observed for the first time. This novel discovery not only provides new insights into the pressure-induced behavior of faceted nanocrystals of palladium and other noble metals but also gives guidance for finding new phases in close-packed metals.
authors.affiliation: Los Alamos Neutron Science Center, Los Alamos National Laboratory, NM 87545, USA. qxguo@lanl.gov
authors.forename: Qixun
authors.initials: Q
authors.lastname: Guo
authors.forename: Yusheng
authors.initials: Y
authors.lastname: Zhao
authors.forename: Wendy L
authors.initials: WL
authors.lastname: Mao
authors.forename: Zhongwu
authors.initials: Z
authors.lastname: Wang
authors.forename: Yujie
authors.initials: Y
authors.lastname: Xiong
authors.forename: Younan
authors.initials: Y
authors.lastname: Xia