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Precursor-Derived Sensing Interdigitated Electrode Microstructures Based on Platinum and Nano Porous Carbon.
Lukas Mielewczyk1, Lydia Galle1, Nick Niese1
1Inorganic Chemistry I, Technische Universität Dresden, Bergstraße 66, 01069, Dresden.
Chemistryopen
|August 19, 2024
Summary
New, cost-effective nanoimprint and inkjet printing methods create interdigital electrodes for chemiresistive sensors. These sensors show high sensitivity for detecting ferrocenyl-methanol, with carbon electrodes achieving a low limit of detection.
Area of Science:
- Materials Science and Engineering
- Nanotechnology
- Sensor Technology
Background:
- Industrially used electron beam lithography for electrode fabrication is complex and expensive.
- There is a need for simpler, more cost-effective methods for producing interdigital electrodes.
- Chemiresistive sensors offer potential for detecting various chemical compounds.
Purpose of the Study:
- To develop and evaluate nanoimprint lithography and piezoelectric inkjet printing for interdigital electrode fabrication.
- To investigate the material dependence (platinum vs. carbon) of electrode performance.
- To assess the influence of electrode geometry (line width, spacing, gap-width) on sensor sensitivity and response time for ferrocenyl-methanol detection.
Main Methods:
- Fabrication of interdigital electrodes using nanoimprint lithography and piezoelectric inkjet printing.
- Material selection included platinum and carbon electrodes.
- Testing of electrodes with varying line widths and spacings as chemiresistive sensors for ferrocenyl-methanol.
Main Results:
- Both nanoimprint lithography and piezoelectric inkjet printing proved suitable for fabricating interdigital electrode structures.
- Carbon electrodes achieved a limit of detection (LOD) as low as 1.2 μM, while platinum electrodes had an LOD of 35.9 μM.
- A rapid response time of 3.6 seconds was recorded, and the influence of gap-width and conductor cross-section on sensitivity was investigated.
Conclusions:
- Nanoimprint lithography and piezoelectric inkjet printing are viable, cost-effective alternatives for producing interdigital electrodes.
- The developed chemiresistive sensor systems demonstrate good performance in detecting ferrocenyl-methanol.
- Further optimization of electrode design and material choice can enhance sensor capabilities.
