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Article
Cited 92 time in webofscience Cited 103 time in scopus
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Spontaneous electrical charging of droplets by conventional pipetting

Title
Spontaneous electrical charging of droplets by conventional pipetting
Authors
Dongwhi ChoiHorim LeeDo Jin ImKang, ISLim, GKim, DSKwan Hyoung Kang
POSTECH Authors
Kang, ISLim, GKim, DS
Date Issued
Jun-2013
Publisher
NATURE PUBLISHING GROUP
Abstract
We report that a droplet dispensed from a micropipette almost always has a considerable electrical charge of a magnitude dependent on the constituents of the droplet, on atmospheric humidity and on the coating material of pipette tip. We show that this natural electrification of a droplet originates from the charge separation between a droplet and pipette tip surface by contact with water due to the ionization of surface chemical groups. Charge on a droplet can make it difficult to detach the droplet from the pipette tip, can decrease its surface tension, can affect the chemical characteristics of solutions due to interactions with charged molecules, and can influence the combination and localization of charged bio-molecules
in all cases, the charge may affect results of experiments in which any of these factors is important. Thus, these findings reveal experimental parameters that should be controlled in experiments that use micropipettes.
URI
http://oasis.postech.ac.kr/handle/2014.oak/15318
DOI
10.1038/SREP02037
ISSN
2045-2322
Article Type
Article
Citation
SCIENTIFIC REPORTS, vol. 3, page. 2037, 2013-06
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강인석KANG, IN SEOK
Dept. of Chemical Enginrg
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