摘要
表面增强拉曼光谱(SERS)是鉴定分子物种的非常强大的工具,但不幸的是它基本上限于贵金属载体(Au,Ag和Cu)。我们报告使用非化学计量的氧化钨纳米结构,海胆样W_(18)O_(49)纳米线作为基底材料,以放大底物—分析物分子的相互作用,导致拉曼光谱特征的显著放大^([1])。丰富的表面氧空位可以带来额外的增强。据我们所知,在半导体材料中,甚至与没有"热点"的贵金属相比,其灵敏度最高。表面增强拉曼散射(SERS)效应是一种表面敏感的技术,其特征在于对于吸附在诸如粗金属的特定表面上的分子的拉曼强度增加的数量级,相对于相同数量的非金属吸附分子在溶液或气相中。
Surface-enhanced Raman spectroscopy（SERS）represents a very powerful tool for the identification of molecular species,but unfortunately it has been essentially restricted to noble metal supports（Au,Ag and Cu）.Here we report the employment of non-stoichiometric tungsten oxide nanostructure,sea urchin-like W18O49 nanowire,as the substrate material,to magnify the substrate–analyte molecule interaction,leading to significant magnifications in Raman spectroscopic signature.The enrichment of surface oxygen vacancy could bring additional enhancements.To our best knowledge,among semiconducting materials,it’s even comparable to noble metals without'hot spots'.The surface-enhanced Raman scattering（SERS）effect is a surfacesensitive technique characterized by an increase in the Raman intensity by orders of magnitude for molecules adsorbed on particular surfaces such as rough metals with respect to that expected from the same number of non-adsorbed molecules in solution or the gas phase.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2018年第S1期139-140,共2页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(21773079
21773080
21711540292)资助
关键词
表面增强拉曼光谱
半导体材料
SERS基底
非化学计量的氧化钨纳米结构
Surface-enhanced Raman spectroscopy
Semiconductor materials
SERS substrate
Non-stoichiometric tungsten oxide nanostructure
