Preparation of ordered array of nanoscopic gold rods by template method and its optical properties
Preparation of ordered array of nanoscopic gold rods by template method and its optical properties
复制标题
DOI：
10.1007/pl00021073
复制
发表时间：
2000-06
期刊：
影响因子：
--
通讯作者：
S. Pan;D. Zeng;H. L. Zhang;H. L. Li
中科院分区：
文献类型：
--
作者：
S. Pan;D. Zeng;H. L. Zhang;H. L. Li
采用阳极氧化法制备了孔径小于20 nm的多孔氧化铝膜。以这些多孔膜为模板，通过电沉积法将金沉积到多孔膜的孔中，制备了均匀的金圆柱阵列。阵列中的所有圆柱体都是平行的，它们的长轴垂直于模板的表面。利用透射电子显微镜（TEM）和扫描电子显微镜（SEM）对模板的形貌和所制备的纳米尺度圆柱阵列进行了表征。阵列沿着长轴方向的消光谱表明，随着长径比（l/d）的增大，阵列的最大消光波长（λmax）向短波长方向移动并增强。用近似的动力学Maxwell-Garnett模型定性地解释了最大值λmax与尺寸的关系，并将计算结果与实验结果进行了比较.
Porous aluminum oxide membranes with pore diameters smaller than 20 nm were prepared by anodization of aluminum. Using these porous membranes as a template, we fabricated uniform gold cylinder arrays by electrodeposition of gold into the pores. All cylinders in the array were parallel, with their long axes perpendicular to the surface of the template. Electron microscopy, including transmission electron microscopy (TEM) and scanning electron microscopy (SEM), were employed to characterize the morphology of the templates and the fabricated nanometer scale of cylinder arrays. The extinction spectra of the arrays along the longer axes showed that the extinction maximal (λmax) shifted to a short wavelength and strengthened when the aspect ratio (l/d) of the cylinders increased. The dependence of the maximal (λmax) on the size was explained qualitatively by using the approximate dynamical Maxwell–Garnett model, and the calculated results were compared with the experimental ones.