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Air microjet system for non-contact force application and the actuation of micro-structures

Khare, SM and Venkataraman, V (2016) Air microjet system for non-contact force application and the actuation of micro-structures. In: JOURNAL OF MICROMECHANICS AND MICROENGINEERING, 26 (1).

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Official URL: http://dx.doi.org/10.1088/0960-1317/26/1/017001 ...


We demonstrate a non-contact technique to apply calibrated and localized forces in the micro-Newton to milli-Newton range using an air microjet. An electromagnetically actuated diaphragm controlled by a signal generator is used to generate the air microjet. With a nozzle diameter of 150 mu m, the microjet diameter was maintained to a maximum of 1 mm at a distance of 5 mm from the nozzle. The force generated by the microjet was measured using a commercial force sensor to determine the velocity profile of the jet. Axial flow velocities of up to 25 m s(-1) were obtained at distances as long as 6 mm. The microjet exerted a force up to 1 mu N on a poly dimethyl siloxane (PDMS) micropillar (50 mu m in diameter, 157 mu m in height) and 415 mu N on a PDMS membrane (3 mm in diameter, 28 mu m thick). We also demonstrate that from a distance of 6 mm our microjet can exert a peak pressure of 187 Pa with a total force of about 84 mu N on a flat surface with 8 V operating voltage. Out of the cleanroom fabrication and robust design make this system cost effective and durable.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the IOP PUBLISHING LTD, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Keywords: air microjet; MEMS testing; non-contact force application; nozzle flow; non-contact actuation; micro-Newton force application; pulsed jet
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 14 Jan 2016 05:23
Last Modified: 14 Jan 2016 05:23
URI: http://eprints.iisc.ac.in/id/eprint/53078

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