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Microdispenser with...
Microdispenser with continuous flow and selectable target volume for microfluidic high-pressure applications
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- Bodén, Roger (författare)
- Uppsala universitet,Mikrosystemteknik
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- Ogden, Sam, 1979- (författare)
- Uppsala universitet,Mikrosystemteknik
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- Hjort, Klas (författare)
- Uppsala universitet,Mikrosystemteknik
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(creator_code:org_t)
- 2014
- 2014
- Engelska.
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Ingår i: Journal of microelectromechanical systems. - 1057-7157 .- 1941-0158. ; 23:2, s. 452-458
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- This paper presents a reusable microdispenser intended for continuous flow dispensing of variable and controlled volumes of liquid against high back-pressures. The microdispenser consists of two active valves and a dispenser chamber, all actuated by the volume change associated with the solid-to-liquid phase transition of paraffin wax. It is fabricated using stainless steel sheets, a flexible printed circuit board, and a polyimide membrane. All are covered with Parylene C for insulation and fusion bonding at assembly. A finite element method (FEM) model of the paraffin actuator is used to predict the resulting flow characteristics. The results show dispensing of well-defined volumes of 350 and 540 nL, with a good repeatability between dispensing sequences, as well as reproducibility between devices. In addition, the flow characteristics show no back-pressure dependence of the dispensed flow in the interval 0.5--2.0 MPa. The FEM model can be used to predict the flow characteristics qualitatively
Nyckelord
- High pressure
- liquid chromatography
- MEMS
- microdispenser
- micropump
- phase change material
- Teknisk fysik med inriktning mot mikrosystemteknik
- Engineering Science with specialization in Microsystems Technology
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- ref (ämneskategori)
- art (ämneskategori)
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