Synthesis and application of polyamide/silver composite for SERS
Surface enhancement of Raman scattering(SERS)is an enhancement of Raman scattering caused by surface plasmon resonance interactions between molecules adsorbed on rough metal surfaces or metal nanostructures and metal surfaces.To increase the surface area of the substrate,polyamide(PA)with excellent chemical stability was used to fabricate nanofiber membranes by electrospinning.In order to investigate the effects on the structure and morphology of fiber membranes,this experiment explored the spinning effects of four different mass fraction of PA solution from 13% to 20% to obtain a PA spinning membrane with good stability and a fiber diameter of approximately 100 mm.After that,then the PA/Ag Spinning membrane was obtained by loading silver nanoparticles(Ag NPs)with different particle sizes on the PA fiber by chemical combination method.PA/Ag spinning membranes of 30 nm and 58 nm were used for Raman analysis,respectively,and rhodamine 6G(R6G)probe molecule was used to measure the SERS performance of PA/Ag fiber membrane materials,the detection limit was approximately 10-10 M.The 58 nm PA/Ag spinning membrane has better reproducibility and can be further used for the Raman detection of folic acid.It was found that 10-8 M folic acid can be detected by the constructed PA/Ag composite substrate,demonstrating the good SERS performance of this substrate.
万方数据
维普
