Cubic to tetragonal phase transformation in cold-compressed Pd nanocubes.
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.
Guo
Qixun
Q
Los Alamos Neutron Science Center, Los Alamos National Laboratory, NM 87545, USA. qxguo@lanl.gov
Zhao
Yusheng
Y
Mao
Wendy L
WL
Wang
Zhongwu
Z
Xiong
Yujie
Y
Xia
Younan
Y