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为了解决表面增强拉曼散射(SERS)衬底的吸附性差、稳定性低以及灵敏度不高的问题,设计了一种沉积银纳米粒子的石墨烯泡沫镍SERS衬底,并进行了实验研究。利用化学气相沉积法在泡沫镍衬底上生长石墨烯,并通过溶液沉积的方法将合成的银纳米粒子沉积在石墨烯泡沫镍衬底表面,烘干后制备成石墨烯泡沫镍修饰银纳米粒子的新型SERS衬底。采用罗丹明6G(R6G)对SERS衬底进行拉曼实验研究,结果表明石墨烯能够较好地淬灭SERS衬底的背景荧光;泡沫镍的独特三维结构能够增大衬底对检测分子的吸附;同时,银纳米粒子也可大幅增强衬底的SERS活性。而修饰了银纳米粒子的石墨烯泡沫镍新型衬底同时具有以上优异特性,是一种具有很大应用潜力的新型SERS衬底。
In order to solve the problem of poor adsorptivity, low stability and low sensitivity of surface enhanced Raman scattering (SERS) substrates, a graphene nickel foam SERS substrate was designed and experimentally studied. The graphene was grown on a foamed nickel substrate by chemical vapor deposition, and the deposited silver nanoparticles were deposited on the surface of the graphene nickel substrate by solution deposition. After drying, graphene foam nickel modified silver nanoparticles New SERS substrate. Raman experiments on SERS substrates with rhodamine 6G (R6G) show that graphene can quench the background fluorescence of SERS substrates better. The unique three-dimensional structure of nickel foam can increase the adsorption of the detection molecules ; At the same time, silver nanoparticles can also greatly enhance the SERS activity of the substrate. The novel graphene foam nickel substrate with silver nanoparticles modified has the above excellent properties and is a novel SERS substrate with great potential for application.