Detection of CuAuPd Phase Boundaries Using Core Level Shifts.
Detection of CuAuPd Phase Boundaries Using Core Level Shifts.
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使用核心能级位移检测 CuAuPd 相界。
DOI：
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发表时间：
2017
影响因子：
3.3
通讯作者：
A. Gellman
中科院分区：
文献类型：
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作者：
C. Yin;James B. Miller;P. Kondratyuk;A. Gellman
对Cu 2 p3/2、Au 4f 7/2和Pd 3d 3/2的X射线光电子能谱进行了高通量研究，这些X射线光电子能谱是从制备为单一成分扩散合金膜（CSAF）的Cu xAu yPd 1-x-y合金样品的连续分布获得的。所有这三种元素都表现出其核心水平结合能相对于它们的纯态时，稀释到合金的位移。Cu 2 p3/2芯能级位移（CLS）在CuxAuyPd 1-x-y合金在FCC和B2相之间转变的组成范围内表现出额外的位移。这种不连续的CLS已被用来映射的范围内的B2相跨越三元CuxAuyPd 1-x-y合金成分空间。芯能级结合能对合金相的敏感性提供了使用XPS来研究合金纳米颗粒、纳米薄膜和其他不适合通过基于衍射的方法进行结构测定的形态中的相的机会。
A high throughput study has been conducted of the Cu 2p3/2, Au 4f7/2, and Pd 3d3/2 X-ray photoemission spectra obtained from a continuous distribution of CuxAuyPd1-x-y alloy samples prepared as a single composition spread alloy film (CSAF). All three elements exhibit shifts of their core level binding energies with respect to their pure states when diluted into the alloy. The Cu 2p3/2 core level shift (CLS) exhibits additional shifts over the composition ranges at which the CuxAuyPd1-x-y alloy transitions between FCC and B2 phases. This discontinuous CLS has been used to map the extent of the B2 phase across the ternary CuxAuyPd1-x-y alloy composition space. The sensitivity of core level binding energies to the alloy phase offers an opportunity to use XPS to study phases in alloy nanoparticles, ultrathin films, and other morphologies that are not amenable to structure determination by diffraction based methods.