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Updated: Jan 21, 2026

Bridging the Bio-Electronic Interface with Biofabrication

Bridging the Bio-Electronic Interface with Biofabrication

Published on: June 6, 2012

A flexible plasmonic SERS hydrogel patch for metabolite sensing on bio-interfaces.

Yide Yang¹, Zehou Su¹, Xuanting Liu¹

¹Sixth People's Hospital, School of Medicine & School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China. yejian78@sjtu.edu.cn.

|January 19, 2026

Summary

Researchers developed a flexible Surface-Enhanced Raman Spectroscopy (SERS) hydrogel patch for real-time, non-invasive monitoring of biochemical molecules. This advanced sensor enables label-free detection of key metabolites at biological interfaces.

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Published on: November 17, 2023

Area of Science:

Materials Science and Engineering
Biomedical Engineering
Analytical Chemistry

Background:

Growing demand for real-time, non-invasive monitoring of biochemical molecules necessitates advanced flexible sensing materials.
Rigid Surface-Enhanced Raman Spectroscopy (SERS) substrates lack mechanical compatibility for dynamic biological surfaces.
Need for adaptable SERS platforms for applications in skin and neural tissue monitoring.

Purpose of the Study:

To develop a flexible SERS hydrogel patch for label-free detection of metabolites at bio-interfaces.
To enhance mechanical compatibility and conformal adhesion for dynamic biological surfaces.
To demonstrate in situ metabolite monitoring capabilities for potential biomedical applications.

Main Methods:

Integration of a self-assembled silver nanoparticle film with an ultrathin polyvinyl alcohol (PVA) hydrogel layer.
Fabrication of a flexible SERS hydrogel patch for conformal adhesion to biological tissues.
Utilized SERS for label-free detection of metabolites, including glucose, uric acid, and urea.

Main Results:

The SERS hydrogel patch demonstrated good plasmonic enhancement, mechanical durability, and SERS stability.
Achieved label-free detection of metabolites within 6 minutes of analyte exposure.
Detected glucose down to 1 μM, uric acid to 50 μM, and urea to 1 mM.
Successful ex vivo demonstration on porcine brain and muscle tissues.

Conclusions:

The flexible SERS hydrogel patch is a viable platform for in situ metabolite monitoring at bio-interfaces.
The developed patch offers a promising solution for non-invasive biochemical sensing in dynamic biological environments.
Potential applications include brain-machine interfaces and implantable sensors requiring real-time biochemical feedback.