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Home arrow CFD Paper Library arrow Software Tool arrow CFD-ACE arrow PipeJet - A simple disposable dispenser for the nano- and microliter range
PipeJet - A simple disposable dispenser for the nano- and microliter range
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Authors
W. Streule, T. Lindemann, G. Birkle, R. Zengerle, P. Koltay IMTEK
Abstract
This paper reports on a simple, disposable non-contact dispenser for the nano- and microliter range. In contrast to other known dispensers manufactured by silicon micromachining [1-4] the new device simply consists of an elastic polymer tube with circular cross section. Actuation is done by a piezostack driven piston, squeezing the tube at a defined position nearby the open end by a significant fraction of the cross section. In contrast to dropon- demand devices based on an acoustic actuation principle [5] this leads to a significant mechanical displacement of the liquid. In our experiments we successfully tested a large number of media in the viscosity range from 1 mPas to 27 mPas and even up to approximately 2000 mPas. Frequency characteristics showed an independent dosage volume for water up to a frequency of 15 Hz for tubes with approximately 200 μm inner diameter. Standard deviation within 1,000 shots resulted in an excellent CV of less than 2% of the dosage volume. Using tubes with an inner diameter of approximately 1000 μm and a print frequency of 340 Hz a flow rate up to 143 μl/s could be reached. Beyond the possibility to dispense pure liquids also emulsion paints with particles of approximately 40 μm diameter have been printed successfully.
Keywords
non-contact dispenser; nanoliter range; microliter range; low-cost; drop-on-demand; jets
Source
Elsevier Editorial(tm) for Journal of the Association for Laboratory
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