Diffusion Effects in the Wetting of a Contaminated Surface

Shanahan, M. E. R.

doi:10.1006/jcis.2000.6996

Cited by 8 publications

(4 citation statements)

References 12 publications

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“…This suggests that the diffusion on a glass surface has a significant effect in the real experimental system. There have been several studies concerning the effect of diffusion on the motion of a self-running droplet [16,32,33]. Thiele et al [16] stated that in their model a running droplet can be stopped by increasing the effect of a surfactant diffusion on a substrate.…”

Section: Numerical Resultsmentioning

confidence: 99%

Chemosensitive running droplet

et al. 2005

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Chemical control of the spontaneous motion of a reactive oil droplet moving on a glass substrate under an aqueous phase is reported. Experimental results show that the self-motion of an oil droplet is confined on an acid-treated glass surface. The transient behavior of oil-droplet motion is also observed with a high-speed video camera. A mathematical model that incorporates the effect of the glass surface charge is built based on the experimental observation of oil-droplet motion. A numerical simulation of this mathematical model reproduced the essential features concerning confinement of oil droplet motion within a certain chemical territory and also its transient behavior. Our results may shed light on physical aspects of reactive spreading and a chemotaxis in living things.

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Section: Numerical Resultsmentioning

confidence: 99%

Chemosensitive running droplet

et al. 2005

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13] The other process is the relatively slower wetting/dewetting process (sub-milliseconds to several hours) that reects the interaction between the droplet and the substrate. [14][15][16][17][18][19][20][21] In some cases, the translational motion of droplets induced by that interaction was reported. [22][23][24][25] For droplets of pure liquids, which contain no chemicals interacting with the substrate surface, the contact angle of the droplet on the ideal at surface relaxes to the equilibrium value q E determined by Young's equation:…”

Section: Introductionmentioning

confidence: 99%

Dewetting of a droplet induced by the adsorption of surfactants on a glass substrate

2014

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The dewetting of a surfactant droplet, induced by the adsorption of surfactants on a hydrophilic glass substrate, was observed experimentally. After being dropped onto the substrate, the droplet began shrinking and the speed of shrinkage increases with the surfactant concentration. We explained this dynamics, which is known as reactive dewetting, semi-quantitatively by expanding a simple theoretical model originally proposed and discussed qualitatively by M. E. R. Shanahan and P.-G. de Gennes [Start-up of a reactive droplet, C. R. Acad. Sci. Paris, 1997, 324, 261-268]. In addition, for the surfactant droplet with a concentration near or higher than the critical micelle concentration (CMC), we found that it maintains a large final contact area compared with that in the case of the low surfactant concentration. We discussed this phenomenon by taking the decrease in the vapor-liquid and solid-liquid interfacial tensions into consideration.

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“…Based on the literature (cf. [19,20]), the diffusion of contaminations (release agent molecules) inside the resin can be justified by the second Fick's law. In the specific case of this paper, the equation includes the contamination ratio at a specific location (x) perpendicular to the mold surface (cf.…”

Section: Diffusion Of Contaminationsmentioning

confidence: 99%