Guo Qixun, Zhao Yusheng, Mao Wendy L, Wang Zhongwu, Xiong Yujie, Xia Younan
Los Alamos Neutron Science Center, Los Alamos National Laboratory, NM 87545, USA.
Nano Lett. 2008 Mar;8(3):972-5. doi: 10.1021/nl0731217. Epub 2008 Feb 1.
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.
平均边长约为10纳米的钯纳米立方体在金刚石对顶砧（DAC）中被压缩至24.8吉帕。利用原位同步加速器X射线衍射监测结构变化，首次观察到从面心立方（fcc）到面心四方（fct）的畸变。这一新颖发现不仅为钯和其他贵金属的多面纳米晶体的压力诱导行为提供了新见解，也为在密排金属中发现新相提供了指导。
