Nucleus-free two-dimensional electron gas structure enhanced Raman scattering  

无核二维电子气结构增强拉曼散射

作　　者：Xun Wang 王训(Department of Chemistry,Tsinghua University,Beijing 100084,China)

机构地区：[1]Department of Chemistry,Tsinghua University,Beijing 100084,China

出　　处：《Science Bulletin》2020年第14期1139-1140,M0003,共3页科学通报（英文版）

摘　　要：As a powerful non-destructive and label-free detection technology,surface enhanced Raman scattering(SERS)has been widely used in environmental-pollutant detection,biological-tissue sensing,molecular fingerprint analysis and so on.Since Fleishmen et al.[1]and Van Duyne et al.[2]discovered SERS on rough silver surface,the search for perfect materials as substrates for SERS is one of the challenges of material and chemical scientists.Although the electromagnetic mechanism(EM)based noble-metal substrates show superior enhancement factor(EF)of 10^6 or higher,they inevitably suffer from the poor biocompatibility,nearly immobilized band structure,excessive cost and so on.SERS has also been found in semiconductors,which Raman enhancement is thought to be the chemical mechanism(CM)caused by the charge-transfer between the analytes and the substrates.Although these CM-based SERS substrates have the advantage of adjustable band gap,excellent biocompatibility and low cost,they are generally trapped by the low EF and the poor stability compared with noble-metals.Therefore,the discovery of highly sensitive SERS materials with high stability,low cost and environmental friendliness is a major issue to be solved urgently both in academic and practical perspectives.

关 键 词：NOBLE STABILITY SILVER 

分 类 号：O657.37[理学—分析化学]