Measurement of local crystal lattice strain variations in dealloyed nanoporous gold
Measurement of local crystal lattice strain variations in dealloyed nanoporous gold
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DOI：
10.1080/21663831.2017.1396263
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发表时间：
2018-01-01
影响因子：
8.3
通讯作者：
Rosenauer, Andreas
中科院分区：
文献类型：
--
作者：
Mahr, Christoph;Mueller-Caspary, Knut;Rosenauer, Andreas
纳米多孔结构中可逆的宏观长度变化可以通过施加电势或将它们暴露于不同的气体或液体来实现。因此，这些材料是作为传感器或致动器的应用的感兴趣的候选者。宏观长度变化源于微观晶格参数的变化。在本报告中，我们展示了去合金纳米多孔金中晶格应变的空间分辨测量。结果证实了理论，表明压缩的晶格沿着轴的圆柱形韧带和扩张在径向方向。此外，我们发现，弯曲的npAu表面表现出向内松弛的表面层。[图形]。
Reversible macroscopic length changes in nanoporous structures can be achieved by applying electric potentials or by exposing them to different gases or liquids. Thus, these materials are interesting candidates for applications as sensors or actuators. Macroscopic length changes originate from microscopic changes of crystal lattice parameters. In this report, we show spatially resolved measurements of crystal lattice strain in dealloyed nanoporous gold. The results confirm theory by indicating a compression of the lattice along the axis of cylindrically shaped ligaments and an expansion in radial direction. Furthermore, we show that curved npAu surfaces show inward relaxation of the surface layer.[GRAPHICS].