Wire, mesh, and fiber electrodes for paper-based electroanalytical devices
Stephen E Fosdick1, Morgan J Anderson, Christophe Renault
1Department of Chemistry and the Center for Nano- and Molecular Science and Technology, The University of Texas at Austin , 105 E. 24th St., Stop A5300, Austin, Texas 78712-1224, United States.
Analytical Chemistry
|March 15, 2014
Summary
Microwire and mesh electrodes are integrated into origami paper analytical devices (oPADs). This innovation enables robust electrochemical sensing on paper-based platforms, enhancing diagnostic capabilities.
Area of Science:
- Electrochemistry
- Materials Science
- Analytical Chemistry
Background:
- Paper analytical devices (PADs) offer low-cost, portable sensing solutions.
- Integrating reliable electrodes into PADs remains a challenge for advanced electrochemical applications.
Purpose of the Study:
- To report the successful incorporation of microwire and mesh electrodes into origami paper analytical devices (oPADs).
- To demonstrate the electrochemical performance and compatibility of these novel electrodes within paper-based platforms.
Main Methods:
- Fabrication of oPADs using origami paper folding techniques.
- Incorporation of gold (Au) microwires and carbon fiber mesh electrodes.
- Electrochemical characterization and comparison with finite element simulations.
- Surface modification of Au electrodes using thiol-based chemistry.
Main Results:
- Micrometer-scale Au wires and carbon fibers were successfully integrated into oPADs.
- Electrochemical characteristics of the integrated electrodes matched simulation results.
- Electrodes demonstrated compatibility with both hollow and cellulose-filled paper channels.
- Au electrodes tolerated aggressive cleaning and were amenable to surface modification.
Conclusions:
- Microwire and mesh electrodes are compatible with oPAD fabrication.
- This approach provides a versatile platform for developing advanced paper-based electrochemical sensors.
- The integration method offers advantages in ease of fabrication and electrode robustness.
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