Minimizing gas phase fouling of electrodes using capillarity in surface microstructures

Ulrich Wohlgenannt, D. Chugh, Frederik Kriel, E. Nicolau, C. Cabrera, C. Semprebon, M. Brinkmann, C. Priest*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Spontaneous removal of bubbles from flat and microstructured Pt-coated surfaces was studied to understand the role of surface structure in preventing gas phase fouling of electrodes. Bubble nucleation, growth, and release were observed on flat and micropillar surfaces. On the micropillars a capillary instability releases the bubble from within the structure. This instability reduces the buoyancy force required for complete detachment of the bubble as compared to a flat surface. Numerical calculations of the critical bubble volume for release as well as the evolution of bubble morphologies during growth agree with the observations made in our laboratory experiments.

Original languageEnglish
Title of host publication18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014
PublisherChemical and Biological Microsystems Society
Pages1232-1234
Number of pages3
ISBN (Electronic)9780979806476
Publication statusPublished - Oct 2014
Event18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014 - San Antonio, United States
Duration: 26 Oct 201430 Oct 2014

Conference

Conference18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014
CountryUnited States
CitySan Antonio
Period26/10/1430/10/14

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