PDMS-Based (polydimethylsiloxane-based) surface-enhanced Raman spectrum substrate and preparation method thereof

• Main Authors: GONG ZHENGJUN, SUN JI, FAN MEIKUN
• Format: Patent
• Language: Chinese; English
• Published: 17.10.2017
• 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

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 hydrophilic, both solid surface dirt and liquid pollutant dirt can be detected, the substrate is particularly suitable for detecting pesticides on the surface of vegetables and fruits and in vegetable and fruit juice; furthermore, the sponge is elastic and may deform correspondingly according to roughness of th