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Hierarchical Particle-In-Quasicavity Architecture for Ultratrace In Situ Raman Sensing and Its Application in Real-Time Monitoring of Toxic Pollutants
Analytical Chemistry ( IF 6.7 ) Pub Date : 2020-10-21 , DOI: 10.1021/acs.analchem.0c03375
Jing Yu 1, 2 , Maosen Yang 2 , Zhen Li 2 , Chundong Liu 2 , Yisheng Wei 2 , Chao Zhang 2 , Baoyuan Man 2 , Fengcai Lei 1
Affiliation  

Unstable detection environment is one of the biggest interferences for in situ surface-enhanced Raman spectroscopy (SERS) using in real-time monitoring of toxic pollutants, leading to unreliable results. To address this problem, we have designed and prepared a cavity-based particle-in-quasicavity (PIQC) architecture composed of hierarchical ZnO/Ag nanosheets and nanoprotrusions for improving the in situ SERS performance under a liquid environment. Benefitting from the special cascaded optical field mode, the PIQC ZnO/Ag exhibits excellent in situ SERS detectability, with 10–18 M of limit of detection for rhodamine 6G and 12.8% of signal relative standard deviation value. Furthermore, by means of a microfluidic chip, this PIQC structure is proved to have the quantitative analysis feasibility and realizes real-time monitoring of the 3,3′,4,4′-tetrachlorobiphenyl, a representative global environmental hazard, under the flowing environment. The strategy in this paper provides a brand new idea to promote the application of in situ SERS in contaminant monitoring and is also instructive for light control in other optical fields.

中文翻译:

超痕量原位拉曼传感的分层质腔结构及其在有毒污染物实时监测中的应用

不稳定的检测环境是用于实时监测有毒污染物的原位表面增强拉曼光谱(SERS)的最大干扰之一,从而导致结果不可靠。为了解决这个问题,我们设计并准备了一个基于腔的准量子腔(PIQC)架构,该架构由分层的ZnO / Ag纳米片和纳米突起组成,用于改善液体环境下的原位SERS性能。得益于特殊的级联光场模式,PIQC ZnO / Ag表现出出色的原位SERS检测能力,为10 –18罗丹明6G的检出限M和信号相对标准偏差值的12.8%。此外,通过微流控芯片证明了该PIQC结构具有定量分析的可行性,并且可以在流动的环境中实时监测3,3',4,4'-四氯联苯,这是一种典型的全球环境危害。 。本文中的策略提供了一个崭新的思路,以促进原位SERS在污染物监测中的应用,并且对于其他光学领域的光控制也具有指导意义。
更新日期:2020-11-03
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