一种基于PDMS海绵的表面增强拉曼光谱基底及其制备方法

• Format: Patent
• Language: Chinese
• Published: 13.12.2019
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; METALLURGY; PHYSICS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TESTING

本发明公开了一种基于PDMS海绵的表面增强拉曼光谱基底，包括金属颗粒和具有三维网状孔隙的支撑体，所述金属颗粒附着于所述支撑体的孔隙表面；所述支撑体为PDMS海绵。首先，支撑体具有三维网状的结构，比表面积大，可以负载更多且更均匀的金属颗粒，从而显著提升基底的增强效果，能清晰地测试出待分析物的特征峰，尤其是低波数处的特征峰。其次，当支撑体为PDMS海绵时，由于海绵具有亲水性，因此能够更有效、更快速地进行采样，不仅能检测固体表面污染物也可以对液态污染物进行检测，特别适合于检测蔬果表面以及蔬果汁中的农药；同时，海绵具有弹性，可以根据待测物表面的粗糙度而产生相应形变从而更好的吸附待分析物，是一种具有柔性的基底。 The invention discloses a PDMS-based (polydimethylsiloxane-based) surface-enhanced Raman spectrum substrate, comprising metal particles and a support having three-dimensional mesh pores; the metal particles are attached to the pore surface of the support; the support is PDMS sponge. As the support has three-dimensional mesh structure and large specific surface area and can load more metal particles more evenly, enhancement effect of the substrate can be significantly improved, characteristic peaks, and particularly those at low wave number, of an analysis subject can be clearly tested; further, when the support is PDMS sponge, sampling can be more effectively and more quickly performed as the sponge is hydroph