Forces acting on a single particle in an evaporating sessile droplet on a hydrophilic surface

Jung Yeul Jung, Young Won Kim, Jung Yul Yoo, Junemo Koo, Yong Tae Kang

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35 Citations (Scopus)

Abstract

The evaporating sessile droplet of a mono/didisperse colloid on a plate is a very useful and handy technique in micro/nano/bioapplications to separate, pattern, and control the particles. Although the fundamental nature of the evaporation phenomena and its applications have been extensively proposed, the crucial forces affecting a single particle motion in an evaporating droplet are not reported yet. To elucidate the impact of various forces including the drag, electrostatic, van der Waals, and surface tension forces on the particle motion in suspension, the magnitudes of them are compared using the scale analysis. In the early stage of the evaporation, in which the contact line is fixed, the motion of a single particle suspended in liquid are mostly affected by drag force. Later, with the incidence of the contact line recession, the surface tension force takes over the control of the single particle motion.

Original languageEnglish
Pages (from-to)784-788
Number of pages5
JournalAnalytical Chemistry
Volume82
Issue number3
DOIs
Publication statusPublished - 2010 Feb 1
Externally publishedYes

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ASJC Scopus subject areas

  • Analytical Chemistry

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