科研之友
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摘要
We report the simplest of the small, non-gassing, low-voltage, direct-current, electro-osmotic pumps, providing enough flow for the delivery of drugs. It consists merely of a ceramic frit sandwiched between two plasma-treated carbon paper electrodes; the plasma treatment adds electro-oxidizable hydroquinone and electro-reducible quinone surface functions. Protons released upon the electro-oxidation of the hydroquinone surface functions move concertedly in the applied electric field at the ceramic membrane water interface and by dragging bulk water, causing water to flow at a rate of 10 mu L cm(-2) min(-1) at an applied potential of 1 V across a 2 mm-thick membrane. Following plasma treatment of the carbon paper for 45 min, the flow persists for 18 h, in which 10 mL cm(-2) of water is pumped.
- 出版日期2014-5-13
