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TiO2纳米线的SERS基底.TiO2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10-12mol/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.
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