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Issue 21, 2011
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Tunable catalytic tubular micro-pumps operating at low concentrations of hydrogen peroxide

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Abstract

Catalytic micropumps consisting of Ti/Cr/Pt microtubes with diameters of 5–10 μm and tunable lengths in the range of 20–1000 μm are reported. Micropumps were fabricated by rolling up metallic nanomembranes into microtubes with an inner platinum layer. When immersed into a solution of hydrogen peroxide, the micropumps are activated by the catalytic decomposition of peroxide into oxygen microbubbles and water. Fluid pumping is demonstrated by the movement of polystyrene particles with a diameter of 1 μm through the catalytic microtubes. Concentrations from 0.009 to 11% H2O2 were employed to study the catalytic generation of microbubbles in micropumps with different lengths. A minimum concentration of 0.06% fuel was determined to be sufficient to actuate the micropumps. Such devices based on rolled-up nanomembranes hold great promise for the integration into Lab-on-a-chip systems for sensing, sorting of particles and drug delivery.

Graphical abstract: Tunable catalytic tubular micro-pumps operating at low concentrations of hydrogen peroxide

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Publication details

The article was received on 28 Feb 2011, accepted on 01 Apr 2011 and first published on 20 Apr 2011


Article type: Paper
DOI: 10.1039/C1CP20542K
Citation: Phys. Chem. Chem. Phys., 2011,13, 10131-10135

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    Tunable catalytic tubular micro-pumps operating at low concentrations of hydrogen peroxide

    A. A. Solovev, S. Sanchez, Y. Mei and O. G. Schmidt, Phys. Chem. Chem. Phys., 2011, 13, 10131
    DOI: 10.1039/C1CP20542K

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