Volume of liquid deposited per single event electrospraying controlled by nozzle front surface modification |
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Authors: | Urszula Stachewicz J. Frits Dijksman Caner U. Yurteri Jan C. M. Marijnissen |
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Affiliation: | 1. Department of Healthcare Devices and Instrumentation, Philips Research Europe, High Tech Campus, 5656 AE, Eindhoven, The Netherlands 2. Faculty of Applied Sciences, Delft University of Technology, Julianalaan 136, 2628 BL, Delft, The Netherlands
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Abstract: | Single event electrospraying (SEE) is a method for the on-demand deposition of picoliter volumes of liquid. To investigate the influence of the size of the meniscus on the volume deposited per SEE, glass capillaries were used with and without an anti-wetting coating comprising a self-assembled 1H,1H,2H,2H-perfluorodecyltrichlorosilane-based monolayer to control the meniscus size. The deposited volume was determined experimentally and we developed a model that incorporates electrostatics and electrodynamics on the one hand, and hydrostatics, fluid dynamics, and surface tension effects on the other hand. The volumes deposited from both a capillary with unmodified nozzle front (large meniscus) and from a capillary with a modified nozzle front (small meniscus) can be predicted by the theoretical model. |
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