Catalytic micropumps: Microscopic convective fluid flow and pattern formation

Timothy R. Kline, Walter F. Paxton, Yang Wang, Darrell Velegol, Thomas E. Mallouk, Ayusman Sen

Research output: Contribution to journalArticle

111 Scopus citations


As innovations continue to be made in the fields of microfluidics and the colloidal assembly, new strategies for moving particles and fluids may be needed. Heterogeneous catalysis provides means of locally converting the stored chemical energy of fuels to mechanical energy. We report an ambient temperature stationary "pump" that generates a proton concentration gradient through the bipolar electrochemical decomposition of hydrogen peroxide on patterned silver-gold surfaces. The resulting electric field drives convective fluid flow and pattern formation of colloidal tracer particles at the microscopic level by a combination of electroosmotic and electrophoretic forces.

Original languageEnglish (US)
Pages (from-to)17150-17151
Number of pages2
JournalJournal of the American Chemical Society
Issue number49
Publication statusPublished - Dec 14 2005


All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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