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All-Printed Microfluidic-Electrochemical Devices for Glucose Detection.

Zexi Wang¹, Zhiyi Zhang², Changqing Xu³

¹School of Biomedical Engineering, McMaster University, Hamilton, ON L8S 4L8, Canada.

|December 27, 2024

Summary

This study presents novel microfluidic-electrochemical devices fabricated on PET films for glucose sensing. Optimized printing and surface modification significantly improved device performance and detection limits.

Keywords:

capillary microfluidic electrochemical glucose sensing porous materials printing

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Dry Film Photoresist-based Electrochemical Microfluidic Biosensor Platform: Device Fabrication, On-chip Assay Preparation, and System Operation

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Published on: September 19, 2017

Area of Science:

Electrochemistry
Microfluidics
Materials Science

Background:

Microfluidic-electrochemical devices offer potential for sensitive analyte detection.
Direct printing fabrication methods are desirable for cost-effective device manufacturing.
Polyethylene terephthalate (PET) films provide a flexible and accessible substrate.

Purpose of the Study:

To fabricate free-standing capillary microfluidic channels directly on printed electrodes using a particle/polymer mixture.
To develop microfluidic-electrochemical devices on PET films for glucose sensing.
To investigate factors influencing device performance, including printing parameters and surface modification.

Main Methods:

Direct printing of microfluidic channels and electrodes on PET films using a particle/polymer mixture.
Electrochemical sensing of glucose.
Optimization of microfluidic channel printing (polymer concentration) and surface modification (3-aminopropyltrimethoxysilane).

Main Results:

Achieved a low limit of detection (LOD) of 7 μM for glucose sensing with unmodified printed devices.
Demonstrated substantial performance enhancement through low polymer concentration in the printing mixture.
Showed significant performance boost via surface modification of microfluidic channels.
Identified device structure and enzyme doping level as critical factors for optimal performance.

Conclusions:

Direct printing is a viable method for fabricating microfluidic-electrochemical devices on PET films.
Microfluidic channel printing parameters and surface chemistry are crucial for optimizing sensor performance.
Device design and enzyme loading are important considerations for achieving high-performance glucose sensing.