Control of charged droplets using electrohydrodynamic repulsion for circular droplet patterning

Title
Control of charged droplets using electrohydrodynamic repulsion for circular droplet patterning
Author(s)
주상우김범주[김범주]김성재[김성재]성정우[성정우]임근배[임근배]남효령[남효령]
Keywords
ELECTROSPRAY; MICROCHIP
Issue Date
201107
Publisher
IOP PUBLISHING LTD
Citation
JOURNAL OF MICROMECHANICS AND MICROENGINEERING, v.21, no.7
Abstract
We report a novel method to form a circular pattern of monodisperse microdroplets using an electrohydrodynamic repulsion (EDR) mechanism. EDR is a phenomenon of electrostatical bounced microdroplets from an accumulated droplet on a bottom substrate. In addition to a regular EDR system, by placing a ring electrode between the capillary and ground substrate, two separate regions were created. A parameter study of two regions was carried out for droplet formation and falling velocity to control the radius of the generated droplets and the circular patterns independently. Based on energy conservation theory, our experimental results showed that the free-falling region exerted crucial influences on the sizes of the circular patterns.
URI
http://hdl.handle.net/YU.REPOSITORY/24859http://dx.doi.org/10.1088/0960-1317/21/7/075020
ISSN
0960-1317
Appears in Collections:
공과대학 > 기계공학부 > Articles
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