Pneumatic pumping of liquids using thermal transpiration for lab-on-a-chip applications

Yamarthy, Chakravarthy; Pharas, Kunal; Schultz, A.; McNamara, Shamus

doi:10.1109/icsens.2009.5398354

Cited by 9 publications

(8 citation statements)

References 6 publications

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“…Although it was not quantified, the success rate for producing nanochannels is very high. This demonstrates that the calcium acetate hydrate pre-bond treatment is a viable method for fabricating nano-channels, and this technique is currently being used to fabricate nano-channels for Knudsen gas pumps [10].…”

Section: Resultsmentioning

confidence: 96%

Nano-channel formation using a low-temperature glass-to-glass bonding process

Schultz

Yamarthy

Hnat

et al. 2010

Proceedings of the Institution of Mechanical Engineers, Part N:

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Section: Resultsmentioning

confidence: 96%

Nano-channel formation using a low-temperature glass-to-glass bonding process

Schultz

Yamarthy

Hnat

et al. 2010

Proceedings of the Institution of Mechanical Engineers, Part N:

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“…At present, a number of porous materials for thermal creep flow KPs have already been assembled and tested. These materials are namely, aerogel membranes [95][96][97][98] , mixed cellulose ester (MCE) [99][100][101][102][103][104][105] , natural zeolite 106,107 , porous ceramics 108,109 , glass 110,111 , and Bi 2 Te 3 112 . Note that in most of these KPs, a heater is put on one side of the nanometer porous material to increase the temperature and a heat sink is put on the other side to lower the temperature in order to obtain a larger temperature difference.…”

Section: Thermal Creep Flow Kp Configurationmentioning

confidence: 99%

“…This construction might provide a larger flow rate and compression ratio, and realize the control of gas flow direction. (3) A new method for designing KPs is to use the pores in porous media as micro-channels [95][96][97][98][99][100][101][102][103][104][105][106][107][108][109][110][111][112] . In the future, porous materials having the characteristics of high microporosity, low thermal conductivity and low cost, like the nanoporous thermoelectric material Bi 2 Te 3 proposed by Faiz et al 112 , are expected to be applied in KPs.…”

Section: Exploring New Kpsmentioning

confidence: 99%

Knudsen pumps: a review

Wang

Zhang

et al. 2020

Microsyst Nanoeng

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The Knudsen pump (KP) is a kind of micro-pump that can form thermally induced flows induced by temperature fields in rarefied gas environments. It has the advantages of having no moving parts, simple structure, easy construction and extension, a wide range of energy sources, and low energy consumption. With the development of Micro/Nano Electro Mechanical Systems (MEMS/NEMS), extensive studies have been conducted on KPs, and the applications of KPs have widened. In order to obtain efficient flow fields in KPs, it is necessary to adopt modern computational methods for simulation and analysis. In many circumstances, the simulation and experimental results have good agreement. However, there seems to be no comprehensive review on KPs at present. In this paper, KPs are first defined and classified according to the flow mechanisms of the thermally induced flows. Then, the three aspects of configurations, performance, and applications of KPs in the current state of research are reviewed and analyzed. Finally, the current problems of KP are discussed, and some suggestions are provided for future research and applications.

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“…Micropumps can be further sub-divided into mechanical displacement pumps and energy transfer pumps. Mechanical displacement pumps rely on the oscillatory mechanical motion of diaphragms or flaps for pumping the fluid, which in turn can be achieved through actuation mechanisms such as mechanical, piezoelectric, thermal, and pneumatic [7][8][9][10][11], whereas energy transfer pumps transfer the energy (electric, magnetic, and acoustic) directly to the sample fluid leading to fluid flow. Examples of this category include electrohydrodynamic, magnetohydrodynamic, electroosmotic, electrochemical, and ultrasonic pumps [12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Hand-Powered Elastomeric Pump for Microfluidic Point-of-Care Diagnostics

et al. 2020

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The pumping of fluids into microfluidic channels has become almost an unavoidable operation in all microfluidic applications. Such a need has seen an outburst of several techniques for pumping, out of which the majority of techniques involve complicated fabrication, as they require the introduction of electrodes, valves, piezoelectric materials, acoustic transducers, etc., into the microfluidic device. In addition to the complexity, this also escalates the cost incurred per device. Further, the use of stable external power supplies to produce such a pumping action adds to the bulkiness of the pumps, making them unsuitable for point-of-care diagnostic (POCD) applications. This paper reports a technique of pumping that is simple to realize and does not require external electric/magnetic power, but exploits the elastic properties of materials to achieve the pumping action. This mechanism of pumping ensured the cost per pump to less than 4 USD and can be used for at least 500 times. Several simulations, validation, and characterization experiments were performed on the developed pump to establish its functionality and suitability for use in POCD applications.

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Pneumatic pumping of liquids using thermal transpiration for lab-on-a-chip applications

Cited by 9 publications

References 6 publications

Nano-channel formation using a low-temperature glass-to-glass bonding process

Nano-channel formation using a low-temperature glass-to-glass bonding process

Knudsen pumps: a review

Hand-Powered Elastomeric Pump for Microfluidic Point-of-Care Diagnostics

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