Monitoring the effects of chemical stimuli on live cells with metasurface-enhanced infrared reflection spectroscopy.

Monitoring the effects of chemical stimuli on live cells with metasurface-enhanced infrared reflection spectroscopy.
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DOI:
10.1039/d1lc00580d
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发表时间:
2021-10-12
期刊:
影响因子:
6.1
通讯作者:
Shvets G
Shvets G
中科院分区:
工程技术1区
文献类型:
--
作者:
Huang SH;Li J;Fan Z;Delgado R;Shvets G

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Infrared spectroscopy has found wide applications in the analysis of biological materials. A more recent development is the use of engineered nanostructures – plasmonic metasurfaces – as substrates for metasurface-enhanced infrared reflection spectroscopy (MEIRS). Here, we demonstrate that strong field enhancement from plasmonic metasurfaces enables the use of MEIRS as a highly informative analytic technique for real-time monitoring of cells. By exposing live cells cultured on a plasmonic metasurface to chemical compounds, we show that MEIRS can be used as a label-free phenotypic assay for detecting multiple cellular responses to external stimuli: changes in cell morphology, adhesion, and lipid composition of the cellular membrane, as well as intracellular signaling. Using a focal plane array detection system, we show that MEIRS also enables spectro-chemical imaging at the single-cell level. The described metasurface-based all-optical sensor opens the way to a scalable, high-throughput spectroscopic assay for live cells. A plasmonic metasurface is used for the enhanced infrared spectroscopy of live cells. Real-time cellular response to trypsinization and cholesterol depletion is monitored, and single-cell spectro-chemical imaging using the metasurface is demonstrated.
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