In Situ Integration of SERS Sensors for On‐Chip Catalytic Reactions,Advanced Materials Technologies

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In Situ Integration of SERS Sensors for On‐Chip Catalytic Reactions
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-01-13 , DOI: 10.1002/admt.201900963
Bing Han _{1,

2} , Yuan‐Yuan Gao ₁ , Lin Zhu ₁ , Zhuo‐Chen Ma ₂ , Xu‐Lin Zhang ₁ , Hong Ding ₃ , Yong‐Lai Zhang ₁

Affiliation

The rapid progress of microfluidics has contributed to modern analytical methodology. However, in situ integration of chemical/biological sensors for on‐chip reaction monitoring remains a big challenge. Herein, reported is the fabrication of an integrated surface‐enhanced Raman scattering (SERS) sensor and graphene‐based catalytic chip by laser scribing of graphene oxide (GO) and Ag nanoparticles (AgNPs) composite (AgNPs@GO). The surface plasmonic effect of AgNPs can promote the photoreduction of GO, inducing a high porous nanostructure. By combining the AgNPs@RGO nanocomposite patterns with polydimethylsiloxane microfluidic channels, a bi‐functional microfluidic chip capable of on‐chip catalysis and SERS detection is fabricated. As a proof‐of‐concept demonstration, on‐chip AgNPs‐catalyzed 4‐nitrophenol (4‐NP) reduction has been implemented, in which the reaction process can be well monitored using the in situ SERS sensor. The integration of SERS sensors with functional microfluidic devices may hold great promise for developing advanced Lab‐on‐a‐Chip systems.

中文翻译：

用于片上催化反应的SERS传感器的原位集成

微流体技术的快速发展为现代分析方法做出了贡献。然而，化学/生物传感器的现场集成用于片上反应监测仍然是一个巨大的挑战。本文报道了通过激光刻划氧化石墨烯（GO）和银纳米颗粒（AgNPs）复合材料（AgNPs @ GO）来制造集成的表面增强拉曼散射（SERS）传感器和基于石墨烯的催化芯片。AgNPs的表面等离激元效应可以促进GO的光还原，从而诱导出高的多孔纳米结构。通过将AgNPs @ RGO纳米复合材料图案与聚二甲基硅氧烷微流体通道相结合，可以制造出能够在芯片上催化和SERS检测的双功能微流体芯片。作为概念证明，已实施了片上AgNP催化的4-硝基苯酚（4-NP）还原，使用原位SERS传感器可以很好地监控反应过程。SERS传感器与功能性微流体设备的集成对于开发先进的芯片实验室系统可能具有广阔的前景。

更新日期：2020-02-10

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