Controlling picolitre droplet impact dynamics by tailoring the solid subsurface

Brown, P.S.; Talbot, E.L.; Wood, T.J.; Egan, M.J.; Wu, J.J.; Sainic, K.; Kumarc, N.; Bain, C.D.; Badyal, J.P.S.

doi:10.1016/j.colsurfa.2015.04.047

Controlling picolitre droplet impact dynamics by tailoring the solid subsurface

Brown, P.S.; Talbot, E.L.; Wood, T.J.; Egan, M.J.; Wu, J.J.; Sainic, K.; Kumarc, N.; Bain, C.D.; Badyal, J.P.S.

Authors

P.S. Brown

E.L. Talbot

T.J. Wood

M.J. Egan

Professor Junjie Wu junjie.wu@durham.ac.uk
Deputy Executive Dean

K. Sainic

N. Kumarc

C.D. Bain

J.P.S. Badyal

Abstract

The oscillatory dynamics of picolitre water droplets following impact onto a range of hydrophobic surfaces is found to be influenced by the underlayer stiffness and thickness. The relative contributions of surface functionality versus subsurface hardness have been decoupled by utilising plasmachemical surface functionalisation and underlayer crosslinking respectively. Higher oscillation frequencies are measured for softer and thicker films, which correlates to a larger surface deformation around the liquid droplet contact line.

Citation

Brown, P., Talbot, E., Wood, T., Egan, M., Wu, J., Sainic, K., …Badyal, J. (2015). Controlling picolitre droplet impact dynamics by tailoring the solid subsurface. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 481, 215-221. https://doi.org/10.1016/j.colsurfa.2015.04.047

Journal Article Type	Article
Acceptance Date	Apr 24, 2015
Online Publication Date	May 7, 2015
Publication Date	Sep 20, 2015
Deposit Date	Feb 3, 2016
Publicly Available Date	May 7, 2016
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Print ISSN	0927-7757
Publisher	Elsevier
Peer Reviewed	Peer Reviewed
Volume	481
Pages	215-221
DOI	https://doi.org/10.1016/j.colsurfa.2015.04.047

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Copyright Statement
NOTICE: this is the author’s version of a work that was accepted for publication in Colloids and surfaces A: physiochemical and engineering aspects. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Colloids and surfaces A: physiochemical and engineering aspects, 481, 20 September 2015, 215–221, 10.1016/j.colsurfa.2015.04.047