高密度Au@Ag核壳纳米颗粒复合PA66纳米纤维的合成及对染料的SERS检测

Synthesis of high-density Au@Ag core-shell nanoparticles composite PA66 nanofibers and application in SERS detection of dyes

基于PA66片晶结构实现了银包金核壳纳米颗粒(Au@AgNPs)在PA66纳米纤维表面的原位高密度组装,系统探究了反应时间对复合纤维膜微观形貌的影响,并对复合纤维膜的SERS性能进行了研究。结果表明,复合纤维膜上组装的纳米颗粒粒径随反应时间增加而增大,复合纤维膜(反应时间为10 min)有着最高的SERS活性,对罗丹明6G(R6G)具有较高的检测灵敏性和信号再现性,同时,对染料分子罗丹明B､结晶紫(CV)和孔雀石绿(MG)均具有良好的检测灵敏性,检测限分别为10^(-9)､10^(-10)､10^(-10) mol/L。

Based on PA66's crystal structure,the in-situ high-density assembly of Au@Ag core-shell nanoparticles(Au@AgNPs)on the surface of PA66 nanofibers is realized,the influence of reaction time on the micromorphology of composite fiber membranes is systematically explored,and the surface enhanced Raman scattering(SERS)properties of composite fiber membranes are studied.Results show that the particle size of the nanoparticles assembled on the composite fiber membrane increases with the longer reaction time,and the composite fiber membrane prepared in 10 min of reaction time has the highest SERS activity,and exhibits high detection sensitivity and signal reproducibility for Rhodamine 6G.It also delivers good detection sensitivity for the dye molecules such as Rhodamine B,crystal violet(CV)and malachite green(MG),with detection limits of 10^(-9),10^(-10) and 10^(-10) mol·L^(-1),respectively.