High-Performance Hydrogel SERS Chips with Tunable Localized Surface Plasmon Resonance for Coordinated Electromagnetic Enhancement with Chemical Enhancement,Advanced Optical Materials

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High-Performance Hydrogel SERS Chips with Tunable Localized Surface Plasmon Resonance for Coordinated Electromagnetic Enhancement with Chemical Enhancement
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2023-02-09 , DOI: 10.1002/adom.202202852
Mingming Chen ₁ , Zhihong Liu ₁ , Bihang Su ₁ , Rongjing Hu ₁ , Fengfu Fu ₁ , Xiancai Jiang ₂ , Zhenyu Lin ₁ , Yongqiang Dong ₁

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Hydrogel surface-enhanced Raman scattering (SERS) chips with tunable localized surface plasmon resonance (LSPR) wavelength are prepared to coordinate the chemical enhancement (CM) and electromagnetic enhancement (EM) effects for molecules. When detecting different molecules, a laser with matched energy is selected according to energy intervals between the molecular energy levels and the Fermi level of Ag nanoparticles to obtain the strongest CM effect. Meanwhile, a hydrogel SERS chip with the LSPR wavelength matching with the laser is selected to gain the strongest EM effect. As a result, the constructed hydrogel SERS chips show outstanding activity to many molecules. Amoxicillin, pymetrozine, and chlorpyrifos are used as the model molecules to demonstrate the great importance of CM effect and the working principle of the obtained hydrogel SERS chips. Besides the ultrahigh activity, the obtained hydrogel SERS chips also show high uniformity, long-term stability, and strong anti-interference to the sample matrix, and thereby are highly practical. This work not only provides an efficient strategy for building high-performance SERS substrates, but also sheds the light on the mechanism of wave selection of SERS.

中文翻译：

具有可调局部表面等离子体共振的高性能水凝胶 SERS 芯片，用于协调电磁增强与化学增强

制备具有可调局部表面等离子体共振 (LSPR) 波长的水凝胶表面增强拉曼散射 (SERS) 芯片，以协调分子的化学增强 (CM) 和电磁增强 (EM) 效应。在检测不同分子时，根据分子能级与Ag纳米粒子费米能级之间的能量区间选择能量匹配的激光，以获得最强的CM效应。同时，选用局域表面等离子体共振波长与激光匹配的水凝胶SERS芯片，以获得最强的EM效应。因此，构建的水凝胶 SERS 芯片对许多分子显示出出色的活性。阿莫西林、吡蚜酮、和毒死蜱作为模型分子来证明CM效应的重要性以及所获得的水凝胶SERS芯片的工作原理。所获得的水凝胶SERS芯片除了具有超高的活性外，还表现出高均匀性、长期稳定性以及对样品基体的强抗干扰性，具有很强的实用性。这项工作不仅为构建高性能 SERS 基底提供了一种有效的策略，而且阐明了 SERS 的波选择机制。

更新日期：2023-02-09

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