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目的利用表面增强拉曼光谱散射(surface-enhanced Raman scattering,SERS)能提供独特的分子振动信息的特点制备具有SERS性能的纳米材料,并以对巯基苯胺(PATP)为标记分子对其SERS性能进行评价。方法通过微波法制备粒径均匀、性能稳定的银纳米粒子(AgNP),利用自组装方式使氧化石墨烯(GO)与AgNP经3-巯基丙基三甲氧基硅烷(MPTMS)耦合形成复合材料,以毛细管作为载体,结合PATP标记分子评价基底的性能。结果GO/AgNP复合基底的拉曼强度高于GO,检测PATP分子的灵敏度可达10~(-9)mol/L。结论制备的GO/AgNP复合材料作为SERS基底可增强SERS效应,是一种有效的SERS活性基底。
OBJECTIVE To prepare nanostructured materials with SERS properties by using surface-enhanced Raman scattering (SERS) which can provide unique molecular vibrational information. The SERS performance of the labeled P-thioaniline (PATP) Evaluation. Methods Silver nanoparticles (AgNPs) with uniform size and stable properties were prepared by microwave method. The composite materials were prepared by the self-assembly method of GO and AgNP coupled by 3-mercaptopropyltrimethoxysilane (MPTMS) Capillary as a carrier, combined with PATP labeled molecules to evaluate the performance of the substrate. Results The Raman intensity of GO / AgNP composite substrate was higher than that of GO. The sensitivity of PATP was 10 ~ (-9) mol / L. Conclusion The prepared GO / AgNP composites as SERS substrate can enhance the SERS effect, which is an effective SERS active substrate.