In this study, polyvinyl alcohol (PVA) nanofiber substrates containing silver nanoparticles (AgNPs) were formed by electrospun method. AgNPs were synthesized by in-situ reduction approach under the UV irradiation using PVA as the stabilizer and reductant. SEM, TEM, FTIR, Raman and UV–vis were used to characterize the nanofiber substrates. The results indicated that the average diameter of electrospun flexible PVA/Ag fibers was 250 nm, and the spherical Ag NPs with mean size of less than 10 nm were uniformly embedded into the PVA nanofibers. There appeared a broad absorption peak at 450 nm, which originated from the SPR effect of Ag NPs. The PVA/Ag substrate as-prepared showed the excellent Raman enhancement performance for Rhodamine 6 G detecting. The limit of detection for PVA/Ag SERS substrate was 10⁻⁵M and the enhancement factor (EF) was 1.58 × 10⁵. Moreover, 20 points were randomly selected for testing and the RSD was 8.81 %, indicating the PVA/Ag electrospun nanofibers SERS substrates had excellent uniformity.

在这项研究中，通过电纺丝法形成了包含银纳米颗粒（AgNPs）的聚乙烯醇（PVA）纳米纤维基材。以PVA为稳定剂和还原剂，在紫外线照射下通过原位还原法合成了AgNPs。SEM，TEM，FTIR，拉曼光谱和紫外可见光谱用于表征纳米纤维基材。结果表明，电纺柔性PVA / Ag纤维的平均直径为250 nm，平均粒径小于10 nm的球形Ag纳米颗粒均匀地嵌入到PVA纳米纤维中。在450 nm处出现一个宽吸收峰，这是由于Ag NPs的SPR效应引起的。制备的PVA / Ag底物对罗丹明6 G的检测显示出出色的拉曼增强性能。PVA / Ag SERS底物的检出限为10 ^-5M和增强因子（EF）为1.58×10 ⁵。此外，随机选择20个点进行测试，相对标准偏差（RSD）为8.81％，表明PVA / Ag电纺纳米纤维SERS基底具有优异的均匀性。