Electrostatic Control of Dewetting Dynamics

Edwards, Andrew, Ledesma Aguilar, Rodrigo, Newton, Michael, Brown, Carl V. and McHale, Glen (2020) Electrostatic Control of Dewetting Dynamics. Applied Physics Letters, 116 (25). p. 253703. ISSN 0003-6951

APL20_AR_03160R_Merged_PDF.pdf - Accepted Version

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Official URL: https://doi.org/10.1063/5.0010443


The stability of liquid films on surfaces are critically important in microscale patterning and the semiconductor industry. If the film is sufficiently thin it may spontaneously dewet from the surface. The timescale and rate of dewetting depend on the film repellency of the surface and the properties of the liquid. Therefore, control over the repellency requires modifying surface chemistry and liquid properties to obtain the desired rate of film retraction. Here, we report how the dynamics of a receding thin liquid stripe to a spherical cap droplet can be controlled by programming surface repellency through a non-contact electrostatic method. We observe excellent agreement between the expected scaling of the dynamics for a wide range of voltage-selected final contact angles. Our results provide a method of controlling the dynamics of dewetting with high precision and locality relevant to printing and directed templating.

Item Type: Article
Subjects: F300 Physics
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 15 Jun 2020 10:21
Last Modified: 31 Jul 2021 10:36
URI: http://nrl.northumbria.ac.uk/id/eprint/43441

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