Harlow Gary S, Drnec Jakub, Wiegmann Tim, Lipé Weronica, Evertsson Jonas, Persson Axel R, Wallenberg Reine, Lundgren Edvin, Vinogradov Nikolay A
Division of Synchrotron Radiation Research, Lund University 221 00 Lund Sweden
ESRF - The European Synchrotron 71 Avenue des Martyrs 38000 Grenoble France.
Nanoscale Adv. 2019 Oct 29;1(12):4764-4771. doi: 10.1039/c9na00473d. eCollection 2019 Dec 3.
Using a micro-focused high-energy X-ray beam, we have performed time-resolved depth profiling during the electrochemical deposition of Sn into an ordered porous anodic alumina template. Combined with micro-diffraction we are able to follow the variation of the structure at the atomic scale as a function of depth and time. We show that Sn initially deposits at the bottom of the pores, and forms metallic nanopillars with a preferred [100] orientation and a relatively low mosaicity. The lattice strain is found to differ from previous measurements where the Sn had been removed from the porous support. The dendritic nature of the pore bottom affects the Sn growth mode and results in a variation of Sn grain size, strain and mosaicity. Such atomic scale information of nano-templated materials during electrodeposition may improve the future fabrication of devices.
我们使用微聚焦高能X射线束，在将锡电化学沉积到有序多孔阳极氧化铝模板的过程中进行了时间分辨深度剖析。结合微衍射，我们能够追踪原子尺度上结构随深度和时间的变化。我们表明，锡最初沉积在孔的底部，并形成具有择优[100]取向和相对较低镶嵌度的金属纳米柱。发现晶格应变与之前从多孔载体中去除锡的测量结果不同。孔底部的树枝状性质影响锡的生长模式，并导致锡晶粒尺寸、应变和镶嵌度的变化。电沉积过程中纳米模板材料的这种原子尺度信息可能会改善未来器件的制造。
