Flexible plasmonic nanoparticle-on-a-mirror metasurface-enabled substrates for high-quality surface-enhanced Raman spectroscopy detection

IF 4.7 3区材料科学 Q2 CHEMISTRY, PHYSICAL

Colloid and Interface Science Communications Pub Date : 2023-07-01 DOI:10.1016/j.colcom.2023.100728

Pei Zeng , Dongxu Ma , Mengjie Zheng , Lei Chen , Huikang Liang , Zhiwen Shu , Yifei Fu , Meiyan Pan , Qian Zhao , Huigao Duan

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引用次数: 1

Abstract

Surface-enhanced Raman scattering (SERS) technology with the advantages of ultra-high sensitivity, non-destructive analysis, and quick measurement for molecular detection applications is receiving increasing attention. However, traditional rigid SERS substrates face challenges in in-suit conformal detection and weak structure coupling effect for real-life applications. Here we report a flexible polydimethylsiloxane (PDMS) substrate loaded with plasmonic nanoparticle-on-a-mirror (NPOM) metasurface for SERS detection that featured outstanding sensitivity, uniformity, repeatability, and excellent mechanical flexibility. The upper multilayered NPOM metasurface can be fabricated in a single-step process by ion beam sputtering of various targets. This NPOM configuration consists of dense silver nanoparticles over a silver mirror, separated by a SiO₂ spacer layer, which can realize near-total power absorption and exhibits superior SERS ability. The bottom PDMS layer for support can provide excellent mechanical properties. In the test, the as-prepared NPOM/PDMS substrates show high SERS performance in detecting crystal violet and chlorpyrifos molecules. This flexible metasurface SERS substrate promises to provide an in-suit and efficient approach for trace substance detection.

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柔性等离子体纳米粒子-镜面超表面衬底用于高质量的表面增强拉曼光谱检测

表面增强拉曼散射（SERS）技术以其超高灵敏度、无损分析和快速测量的优点，在分子检测应用中越来越受到关注。然而，传统的刚性SERS衬底在实际应用中面临着适形检测和弱结构耦合效应的挑战。在这里，我们报道了一种柔性聚二甲基硅氧烷（PDMS）基底，该基底负载有等离子体纳米颗粒-反射镜（NPOM）超表面，用于SERS检测，具有卓越的灵敏度、均匀性、可重复性和优异的机械柔性。上部多层NPOM超表面可以通过各种靶的离子束溅射在一步工艺中制造。这种NPOM配置由银镜上的致密银纳米颗粒组成，由SiO2间隔层分隔，可以实现接近全功率吸收，并表现出优异的SERS能力。用于支撑的底部PDMS层可以提供优异的机械性能。在测试中，所制备的NPOM/PDMS底物在检测结晶紫和毒死蜱分子方面表现出较高的SERS性能。这种柔性的超表面SERS基底有望为痕量物质检测提供一种合适且有效的方法。

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来源期刊

Colloid and Interface Science Communications Materials Science-Materials Chemistry

CiteScore

9.40

自引率

6.70%

发文量

125

审稿时长

43 days

期刊介绍： Colloid and Interface Science Communications provides a forum for the highest visibility and rapid publication of short initial reports on new fundamental concepts, research findings, and topical applications at the forefront of the increasingly interdisciplinary area of colloid and interface science.