Electrospun Nanofibrous Membranes Surface-Decorated with Silver Nanoparticles as Flexible and Active/Sensitive Substrates for Surface-Enhanced Raman Scattering

摘要

The development of novel nanomaterials withnwell-controlled morphologies/structures to achieve excellentnactivities/sensitivities in surface-enhanced Raman scatteringn(SERS) is crucial in advancing the high-performance SERSndetections of chemical and biological species. In this study,namidoxime surface-functionalized polyacrylonitrile (ASFPAN)nnanofibrous membranes surface-decorated with silver nanoparticlesn(Ag NPs) were prepared via the technique ofnelectrospinning followed by the method of seed-mediatednelectroless plating. High SERS activities/sensitivities werenobserved from the ASFPAN-Ag NPs nanofibrous membranes, while the density and size of Ag NPs had an important impact onnthe SERS activity/sensitivity. The results confirmed that the enhancement of Raman signals is due to the presence of hot spotsnbetween/among Ag NPs on the nanofiber surfaces. Electrospun nanofibrous membranes surface-decorated with Ag NPs werenmechanical flexible/resilient and could be used as highly active/sensitive SERS substrates for a broad range of applications.