晶体织构对纳米多孔金表面脱合金动力学及成分的影响
Effect of crystallographic texture on dealloying kinetics and composition of nanoporous gold surface
AI总结：
本研究通过对比{111}织构与随机取向的Ag70Au30薄膜脱合金行为，发现织构可显著减缓Ag流失并抑制韧带粗化，展示了微观结构工程对纳米多孔金属性能的调控潜力。
摘要：
纳米多孔金属能够调控成分和表面积与体积比，这两个方面对于催化应用至关重要。本文中，在400°C下沉积了具有面心立方结构的Ag70Au30（2 at.%）薄膜，分别为{111}织构或随机取向。经化学脱合金后，原子探针断层扫描显示，与发生韧带粗化的随机取向薄膜相比，织构薄膜韧带内的Ag浓度保留量高达其2.7倍，表明其脱合金动力学更快。我们的研究凸显了微观结构工程在调控纳米多孔金属性能方面的潜力，有望用于未来的催化和电化学应用。
英文摘要：
Nanoporous metals allow for tailoring composition and surface-to-volume ratio, both aspects critical for applications in catalysis. Here, Ag70Au30 (2 at. %) films with a face-centered cubic structure were deposited at 400°C, either {111}-textured or randomly oriented. Upon chemical dealloying, atom probe tomography of the nanoporous structure reveals that the textured film retains a up to 2.7 times higher Ag concentration within the ligaments compared to the randomly oriented film that exhibits ligament coarsening, indicating faster dealloying kinetics. Our study highlights the potential of microstructure engineering in tailoring the properties of nanoporous metals for possible future catalytic and electrochemical applications.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
