摘要
表面增强拉曼散射(Surface enhanced Raman scattering,SERS)是一种灵敏度很高的生物检测技术。近年来有研究表明,在半导体纳米材料表面用贵金属修饰所得的结构具有很强的SERS效应。本文提出了一种基于负载金纳米颗粒的宽禁带半导体FiO_2纳米线的SERS基底。FiO_2纳米线的制备采用成本低廉、工艺简单的水热合成法,然后采用原位化学还原生长法负载Au纳米颗粒,最后引入罗丹明6G(R6G)作为探针分子,证明该SERS基底能有效增强拉曼信号,实现最低浓度为10^(12)。mol/L的R6G的检测,适合应用于包括生物分子、有机污染等在内的有机分子的痕迹检测。
Surface-enhanced Raman scattering(SERS) has been provened to be a high sensitive method for detection of adsorbed organic molecules with low concentration,and some researches have shown that some semiconductor nano-materials coated with noble metal nanoparticles had strong SERS effects.In this paper,a novel SERS substrate based on hydrothermal synthesized Ti02 nanowires coated with Au nanoparticles was prepared.R6G was introduced as the target molecules and as its concentration decreased to10^(-12)mol/L,the Raman signal still can be clearly observed on this SERS substrate.It proved that this substrate could enhance Raman signal by several orders of magnitude and could be applied for trace level organic detection,including biomolecules,organic pollution,etc.
出处
《功能材料与器件学报》
CAS
CSCD
北大核心
2014年第1期1-6,共6页
Journal of Functional Materials and Devices
基金
863计划重大项目资助(2012AA02A104)
