Department of Mathematics and Information Science, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011, People's Republic of China.
J Phys Condens Matter. 2010 Oct 20;22(41):415105. doi: 10.1088/0953-8984/22/41/415105. Epub 2010 Sep 30.
A new synthesized composite structure, a patterned copper/silicon nanoporous pillar array (Cu/Si-NPA) made by depositing Cu on Si-NPA using an immersion plating method, can be used as a surface-enhanced Raman scattering (SERS) substrate. Its surface component and morphology were analyzed by x-ray diffraction and field-emission scanning electron microscopy, respectively. It was found that the surface was Cu with two kinds of crystal structures: a continuous film composed of Cu nanocrystallites covering the Si-NPA, and a quasi-regular, interconnected network composed of loop-chains of Cu crystallites, with the size in the range of several tens of nanometer to 300 nm, surrounding the porous Si pillars. The composite structure is strongly SERS active using rhodamine 6G as probe molecules, which is mainly due to the patterned hierarchical Cu structure.
一种新合成的复合结构，即通过浸镀法在 Si-NPA 上沉积 Cu 得到的图案化铜/硅纳米多孔柱阵列（Cu/Si-NPA），可用作表面增强拉曼散射（SERS）基底。通过 X 射线衍射和场发射扫描电子显微镜分别对其表面成分和形貌进行了分析。结果发现，表面为 Cu，具有两种晶体结构：由覆盖 Si-NPA 的 Cu 纳米晶组成的连续薄膜，以及由 Cu 晶链组成的准规则、相互连接的网络，尺寸在几十纳米到 300nm 范围内，环绕着多孔硅柱。该复合结构使用罗丹明 6G 作为探针分子表现出强烈的 SERS 活性，这主要归因于图案化的分层 Cu 结构。
