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Dry Film Photoresist-based Electrochemical Microfluidic Biosensor Platform: Device Fabrication, On-chip Assay Preparation, and System Operation
Published on: September 19, 2017
A 3D porous polymer monolith-based platform integrated in poly(dimethylsiloxane) microchips for immunoassay
Qin-Shu Kang1, Xiao-Fan Shen, Na-Na Hu
1Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China.
This study presents a novel microfluidic immunoassay platform using porous polymer monoliths (PPM) for rapid and sensitive detection of proteins and viruses. The developed system achieves low detection limits for IgG and H1N1 influenza virus, showcasing its potential for efficient diagnostics.
Area of Science:
- Biomedical Engineering
- Analytical Chemistry
- Materials Science
Background:
- Microfluidic devices offer miniaturized platforms for biological assays.
- Porous polymer monoliths (PPM) provide high surface area and controlled flow characteristics.
- Sensitive and rapid immunoassay methods are crucial for disease diagnostics.
Purpose of the Study:
- To develop and demonstrate a microfluidic immunoassay platform utilizing porous polymer monoliths (PPM).
- To achieve sensitive and rapid immunocapture and on-line fluorescence immunoassay of protein and virus targets.
- To evaluate the performance of the developed platform for detecting IgG and H1N1 influenza virus.
Main Methods:
- Synthesis of poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) [poly(GMA-co-EGDMA)] monoliths within polydimethylsiloxane (PDMS) microfluidic channels via in situ UV-initiated free radical polymerization.
- Surface modification of PPM to create a high-surface area, specific affinity 3D substrate for immunoassays.
- Integration of PPM with microfluidic devices for direct immunoassay of IgG and sandwich immunoassay of inactivated H1N1 influenza virus.
Main Results:
- Successful synthesis and integration of PPM within PDMS microfluidic channels.
- Achieved detection limits of 4 ng mL(-1) for IgG and less than 10 pg mL(-1) for inactivated H1N1 influenza virus.
- Demonstrated significantly decreased detection time due to enhanced mass transfer and shortened diffusion distances within the monoliths.
Conclusions:
- The developed microfluidic immunoassay platform based on PPM enables highly efficient, fast, and sensitive detection of biological targets.
- The high surface area and flow-through design of PPM contribute to enhanced detection sensitivity.
- This novel platform holds significant promise for advanced diagnostic applications requiring rapid and sensitive immunoassays.
