Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 14, Issue 10, Pages 3146-3153Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200701227
Keywords
autonomous movement; manganese; microparticles; molecular motor; surface analysis
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A general approach for the easy functionalization of bare silica and glass surfaces with a synthetic manganese catalyst is reported. Decomposition of H2O2 by this dinuclear metallic center into H2O and O-2 induced autonomous movement of silica microparticles and glass micro-sized fibers. Although several mechanisms have been proposed to rationalise movement of particles driven by H2O2 decomposition to O-2 and water (recoil from O-2 bubbles,([36-45]) interfacial tension gradient([37-42])), it is apparent in the present system that ballistic movement is due to the growth of O-2 bubbles.
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