Abstract
The mass transfer limitation is one of the major challenges for many electrochemical sensing applications. To overcome this, a piezoelectrically-driven vibrating electrode is presented in this work. CFD and electrochemical testing methods are used to study the effect of vibration on mass transfer properties of the electrode. Mass transfer coefficient enhancement attributed to vibration is observed in the simulation and verified by experiment.
| Original language | English (US) |
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| Title of host publication | MicroTAS 2020 - 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences |
| Publisher | Chemical and Biological Microsystems Society |
| Pages | 524-525 |
| Number of pages | 2 |
| ISBN (Electronic) | 9781733419017 |
| State | Published - 2020 |
| Event | 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2020 - Virtual, Online Duration: Oct 4 2020 → Oct 9 2020 |
Publication series
| Name | MicroTAS 2020 - 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences |
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Conference
| Conference | 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2020 |
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| City | Virtual, Online |
| Period | 10/4/20 → 10/9/20 |
Bibliographical note
Funding Information:According to the CFD simulation, a vibrating solid-liquid interface will generate flow motion in the surrounding liquid. The flow pattern is determined by the vibration mode shape of the interface and its displacement. In addition, the mass transfer properties on the interface are influenced by vibration-induced forced convection in the solution. Both the simulation and the experimental results indicate that the mass transfer coefficient will rise when the vibration intensity increases. The integrated vibrating membrane electrode can be used in a wide range of electrochemical micro sensors that are limited by diffusion rate. ACKNOWLEDGEMENTS The fabrication was conducted in the Minnesota Nano Center, which is supported by the National Science Foundation through the National Nano Coordinated Infrastructure Network under Award Number ECCS-1542202. The numerical part was carried out using computing resources at the University of Minnesota Supercomputing Institute. REFERENCES [1] Alizadeh, Negar, and Abdollah Salimi. "Ultrasensitive bioaffinity electrochemical sensors: advances and new perspectives." Electroanalysis 30.12 (2018): 2803-2840. [2] Labib, Mahmoud, Edward H. Sargent, and Shana O. Kelley. "Electrochemical methods for the analysis of clinically relevant biomolecules." Chemical reviews 116.16 (2016): 9001-9090. [3] Peled, Y., et al. "Electrochemical determination of low levels of uranyl by a vibrating gold microelec-trode." Analytical chemistry 87.1 (2015): 768-776. CONTACT * Tianhong Cui; phone: +1-612-626-1636; cuixx006@umn.edu
Publisher Copyright:
© 2020 CBMS-0001
Keywords
- Computational fluid dynamics
- Electrochemical
- Mass transfer
- Piezoelectric
- Vibrating electrode