Abstract
In this study, Ag/CNTs composite films with excellent properties of surface-enhanced Raman scattering (SERS) were fabricated. The SEM images show that the template effect and stress concentration area of carbon nanotubes (CNTs) can not only induce the growth of Ag nanoparticles, but effectively increase the number and intensity of "hot spots". Due to the introduction of CNTs, the plasma absorption peak of Ag/CNTs composite films was observed to be enhanced in the range of visible light. The as-deposited Ag/CNTs samples showed high sensitivity and good temporal stability in the detection of MB probe molecules, with the detection limit of 10−9 mol/L and the enhancement factor of 6 × 105, respectively. In addition, the enhancement contribution of the substrate was further investigated by Finite difference time domain simulation, and the simulation results were consistent with those of the experimental results, which indicate that the synthesized Ag/CNTs thin films have potential application prospect in SERS technology.
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