论文标题
Au纳米线的狭窄生长期间的各向异性应变变化
Anisotropic strain variations during the confined growth of Au nanowires
论文作者
论文摘要
The electrochemical growth of Au nanowires in a template of nano-porous anodic aluminum oxide was investigated in situ by means of grazing-incidence transmission small- and wide-angle x-ray scattering (GTSAXS and GTWAXS), x-ray fluorescence (XRF) and 2-dimensional surface optical reflectance (2D-SOR). GTWAXS模式随时间的函数的XRF和总体强度用于监测电沉积的进度。此外，我们在生长方向和限制方向上提取了粉末衍射模式，以遵循方向依赖性应变的演变。电沉积开始后很快，该应变在垂直方向上变成拉伸，并在水平方向上压缩，这表明纳米结构的晶格变形可以通过适当选择的沉积时间来人为变化。通过将电沉积序列交替到静止序列，我们观察到晶格参数在生长方向上的波动，这是由于电迁移引起的应力。
The electrochemical growth of Au nanowires in a template of nano-porous anodic aluminum oxide was investigated in situ by means of grazing-incidence transmission small- and wide-angle x-ray scattering (GTSAXS and GTWAXS), x-ray fluorescence (XRF) and 2-dimensional surface optical reflectance (2D-SOR). The XRF and the overall intensity of the GTWAXS patterns as a function of time were used to monitor the progress of the electrodeposition. Furthermore, we extracted powder diffraction patterns in the direction of growth and in the direction of confinement to follow the evolution of the direction-dependent strain. Quite rapidly after the beginning of the electrodeposition, the strain became tensile in the vertical direction and compressive in the horizontal direction, which showed that the lattice deformation of the nanostructures can be artificially varied by an appropriate choice of the deposition time. By alternating sequences of electrodeposition to sequences of rest, we observed fluctuations of the lattice parameter in the direction of growth, attributed to stress caused by electromigration.. Furthermore, the porous domain size calculated from the GTSAXS patterns was used to monitor how homogeneously the pores were filled.
