Journal
IEEE SENSORS JOURNAL
Volume 8, Issue 5-6, Pages 488-494Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2008.918726
Keywords
electrokinetic pump; electroosmotic pump; micropump; microsystem; nanochannel
Funding
- National Natural Science Foundation of China [20475034]
- Korea Science and Engineering Foundation [2006-02368]
- Strategic National RD Program
- National Research Foundation of Korea [2006-02368, 과C6A2605] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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High-pressure electroosmotic pumps (EOPs) operate on the principle that electroosmotic flow (EOF) can be generated through a packed-bed capillary by applying an electric field through it. In this paper, a novel packed-bed EOP design using nanosilica particles is described. The packed-bed capillary was fabricated using a capillary of 5 cm x 530 mu m i.d. close packed with silica particles having an average particle size of 20-30 nm. The flow rates, pressures and pressure/flow rate (P - Q) characteristics, electric properties of the pump and the influence of phosphate buffer concentration on the pump were carefully studied. By increasing the pressure, decreasing the applied voltage, and the electric current, the thermodynamic efficiency was about 1%-2% for inorganic buffers and 3%-5% for organic solvents or their mixture without ions.
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