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Open AccessArticle

3D Ultrasensitive Polymers-Plasmonic Hybrid Flexible Platform for In-Situ Detection

1
School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
2
Institute of Materials and Clean Energy, Shandong Normal University, Jinan 250014, China
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(2), 392; https://doi.org/10.3390/polym12020392
Received: 3 January 2020 / Revised: 29 January 2020 / Accepted: 30 January 2020 / Published: 9 February 2020
(This article belongs to the Special Issue Metal Nanoparticles-Polymer Hybrid Materials)
This paper introduces a three-dimensional (3D) pyramid to the polymers-plasmonic hybrid structure of polymethyl methacrylate (PMMA) composite silver nanoparticle (AgNPs) as a higher quality flexible surface-enhanced Raman scattering (SERS) substrate. Benefiting from the effective oscillation of light inside the pyramid valley could provide wide distributions of 3D “hot spots” in a large space. The inclined surface design of the pyramid structure could facilitate the aggregation of probe molecules, which achieves highly sensitive detection of rhodamine 6G (R6G) and crystal violet (CV). In addition, the AgNPs and PMMA composite structures provide uniform space distribution for analyte detection in a designated hot spot zone. The incident light can penetrate the external PMMA film to trigger the localized plasmon resonance of the encapsulated AgNPs, achieving enormous enhancement factor (~ 6.24 × 10 8 ). After undergoes mechanical deformation, the flexible SERS substrate still maintains high mechanical stability, which was proved by experiment and theory. For practical applications, the prepared flexible SERS substrate is adapted to the in-situ Raman detection of adenosine aqueous solution and the methylene-blue (MB) molecule detection of the skin of a fish, providing a direct and nondestructive active-platform for the detecting on the surfaces with any arbitrary morphology and aqueous solution. View Full-Text
Keywords: SERS; PMMA; AgNPs; in-situ; adenosine; methylene-blue SERS; PMMA; AgNPs; in-situ; adenosine; methylene-blue
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MDPI and ACS Style

Wu, M.; Zhang, C.; Ji, Y.; Tian, Y.; Wei, H.; Li, C.; Li, Z.; Zhu, T.; Sun, Q.; Man, B.; Liu, M. 3D Ultrasensitive Polymers-Plasmonic Hybrid Flexible Platform for In-Situ Detection. Polymers 2020, 12, 392.

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