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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Acknowledgments
This study was supported by the European research program, Marie Curie Actions, Early Stage Fellowship; project number MEST-CT-2004-505006 and Philips Research Europe. The authors thank Peter Barendse, Albert Geven, Martin Vernhout, and Leo van den Besselaar for the assistance and help with the building of the experimental setup, and Dirk Burdinski for his help with applying the antiwetting coating on the glass nozzles and for useful discussion, and comments.
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Stachewicz, U., Dijksman, J.F., Yurteri, C.U. et al. Volume of liquid deposited per single event electrospraying controlled by nozzle front surface modification. Microfluid Nanofluid 9, 635–644 (2010). https://doi.org/10.1007/s10404-010-0576-5
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DOI: https://doi.org/10.1007/s10404-010-0576-5