Highly Raman-Enhancing Silver Nanocap Arrays: Controlled Assembly and The Application in Trace Detection
报告 人：郎咸忠 博士生
导 师：邱 腾 教 授
报告时间：
报告地点：东南大学九龙湖校区田家炳楼南楼203
摘 要：Surface-enhanced Raman scattering (SERS) has drawn widespread attention as a powerful spectroscopic technique capable of non-destructive and ultrasensitive characterization down to single molecular level. Its unique physical properties are expected to generate many new applications. However, “hot spots” on traditional SERS-active substrates are found at unpredictable positions, and the SERS intensity changes dramatically from one “hot spot” to another even on the same sample due to the irregular geometry. These fatal drawbacks limit the applications in quantitative and reliable sensing. In this lecture, (1) A convenient nanoscale technique is reported for the fabrication of highly ordered hemispherical silver nanocap arrays (SNAs) templated by porous anodic alumina membranes as robust and cost-efficient SERS substrates. (2) Finite-difference time-domain calculations indicate that the structure may possess excellent SERS characteristics due to the high density and abundance of hot spots. (3) A convenient strategy is demonstrated for trace detection of multiwalled carbon nanotubes (MWNTs) using SNAs.
个人简介：
郎咸忠，男，2008年进入东南大学物理系攻读硕士学位，2010年提前攻博。2011年，因“有序银岛膜在高灵敏细胞显微成像中的应用”工作，获得江苏省普通高校研究生科研创新计划资助，同年获得东南大学优秀博士论文基金资助，目前研究方向为有序贵金属纳米晶阵列的调控及其在表面增强光谱中的应用，在国际核心期刊上发表SCI论文数篇，与指导教师一起申请专利两项。