High flow rate per power electroosmotic pumping using low ion density solvents

Kim, Daejoong; Posner, Jonathan D.; Santiago, Juan G.

doi:10.1016/j.sna.2007.07.023

Cited by 50 publications

(31 citation statements)

References 33 publications

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“…The tortuosity of this type of frit is typically 1.45, as reported for ROBU ultrafine porous glass frits [7]. We estimated the pore radius a to be 0.53 m from the measurement of maximum flow rate and maximum pressure, which has proved be the most accurate method for porous glass EO pumps [9,16].…”

Section: Methodsmentioning

confidence: 71%

“…(Its brief history was well reviewed in Yao and Santiago [2].) Various pumping materials, for example, have been developed: microfabricated glass [3][4][5][6], porous glass [7][8][9], polymer frits [10], porous silicon [11], porous alumina [12][13][14][15], Nafion [16], etc.…”

Section: Introductionmentioning

confidence: 99%

“…We believe that EO pumps may be useful to pump methanol-water mixtures of various compositions. We also characterize EO pumping in terms of flow rate per current, which was found to be an important parameter in DMFC applications [9]. Fig.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of electroosmotic pumps using methanol/water mixtures with various compositions

Kwon

Kim

2011

Sensors and Actuators A: Physical

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Section: Methodsmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

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Characterization of electroosmotic pumps using methanol/water mixtures with various compositions

Kwon

Kim

2011

Sensors and Actuators A: Physical

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“…Methanol is used as a working fluid since it is a good solvent for Coumarin 102. The Debye length (k D ) of the solution is estimated to be on the order of 100 nm (Kim et al 2008).…”

Section: Experimental Methodsmentioning

confidence: 99%

Ultrafast measurement of transient electroosmotic flow in microfluidics

Kuang

Qiao

Wang

2011

Microfluid Nanofluid

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We present a non-intrusive molecular dye based method, i.e., laser-induced fluorescence photobleaching anemometer (LIFPA), to significantly increase temporal resolution (TR) for velocity measurement of fast transient electrokinetic flows. To our knowledge, the TR has been for the first time achieved to 5-10 ls, about 100 times better than that published from state-of-the-art micro particle image velocimetry (lPIV), which is currently the most widely used velocimetry in the microfluidics community.The new method provides us with new opportunities to study experimentally the fundamental phenomena of unsteady electrokinetics (EK) and to validate relevant theoretical models. One application of the new method is demonstrated by measuring the rise time of DC electroosmotic flows (EOFs) in a microcapillary of 10 lm in diameter.

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“…Previously reported, as well as presently manufactured, electroosmotic pumps are built with porous platinum electrodes, operating at waterelectrolyzing voltages, typically >3.0 V [4,7]. Because of the O 2 and H 2 bubbles produced are trapped in the porous electrodes and on the membrane, their liquidcontacted areas are reduced and the flow is irregular.…”

Section: Flow Controlmentioning

confidence: 99%

A miniature, single use, skin-adhered, low-voltage, electroosmotic pumping-based subcutaneous infusion system

Shin

Lee

et al. 2011

Drug Deliv. and Transl. Res.

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A programmable, skin-attached, 36 × 30 × 8 mm system for subcutaneous infusion of 1.2 mL of a drug solution is described. The system is intended to be replaced daily. It comprises a 20 × 14 × 8 mm electronic controller and power source, an 8 mm diameter 2 mm thick electroosmotic pump, a two-compartment reservoir for a pumped water and a drug solution, an adhesive tape for attachment to the skin, and a 6 mm long 27 gauge needle. Its removable electronic controller programs the dose rate and dose and is re-used. The electroosmotic pump consists of a porous ceramic membrane sandwiched between a pair of Ag/Ag2O plated carbon paper electrodes. It operates below 1.23 V, the thermodynamic threshold for water electrolysis without gassing. The flow rate can be adjusted between 4 and 30 μL min(-1) by setting either by the voltage (0.2-0.8 V) or the current (30-200 μA). For average flow rates below 4 μL min(-1), the pump is turned on and off intermittently. For example, a flow rate of 160 μL day(-1), i.e., 0.13 μL min(-1) for basal insulin infusion in type 1 diabetes management, is obtained when 10 s pulses of 75 μA is applied every 15 min. High flow rates of 10-30 μL min(-1), required for prandial insulin administration, are obtained when the pump operates at 50-200 μA. To prevent fouling by the drug, only pure water passes the pump; the water pushes a drop of oil, which, in turn, pushes the drug solution.

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High flow rate per power electroosmotic pumping using low ion density solvents

Cited by 50 publications

References 33 publications

Characterization of electroosmotic pumps using methanol/water mixtures with various compositions

Characterization of electroosmotic pumps using methanol/water mixtures with various compositions

Ultrafast measurement of transient electroosmotic flow in microfluidics

A miniature, single use, skin-adhered, low-voltage, electroosmotic pumping-based subcutaneous infusion system

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