期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 22, 期 5, 页码 1587-1591出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201503892
关键词
microfluidic chips; micromotors; platinum; pollution abatement; polymers
资金
- National Natural Science Foundation of China [21573053]
- State Key Lab of Urban Water Resource and Environment in HIT [ES ES201513]
A catalytic polymer multilayer shell motor has been developed, which effects fast motion-based separation of charged organics in water. The shell motors are fabricated by sputtering platinum onto the exposed surface of silica templates embedded in Parafilm, followed by layer-by-layer assembly of polyelectrolyte multilayers to the templates. The catalytic shell motors display high bubble propulsion with speeds of up to 260 mu ms(-1) (13 body lengths per second). Moreover, the polyelectrolyte multilayers assembled at high pH (pH>9.0) adsorb approximately 89% of dye molecules from water, owing to the electrostatic interaction between the positively charged polymers and the anionic dye molecules, and subsequently release them at neutral pH in a microfluidic device. The efficient propulsion coupled with the effective adsorption behavior of the catalytic shell motors in a microfluidic device results in accelerated separation of organics in water and thus holds considerable promise for water analysis.
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