Equilibrium drop shapes on a tilted substrate with a chemical step

Devic, I.; Escobar, J. M. E.; Lohse, Detlef

doi:10.1021/acs.langmuir.8b03557

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Equilibrium drop shapes on a tilted substrate with a chemical step

MPS-Authors

/persons/resource/persons192998

Lohse, Detlef
Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Devic, I., Escobar, J. M. E., & Lohse, D. (2019). Equilibrium drop shapes on a tilted substrate with a chemical step. Langmuir, 35(11), 3880-3886. doi:10.1021/acs.langmuir.8b03557.

Cite as: https://hdl.handle.net/21.11116/0000-0003-0678-0

Abstract

We calculate the equilibrium shape of a droplet sitting on a tilted substrate with a ''chemical step'', i.e., different lypophilicity at the two sides of the step. This problem can be generalized to that of a droplet experiencing a body force, pushing it from the lyophilic part to the lyophobic part of the substrate. We present phase diagrams, in which we show for which droplet sizes there are dynamically inaccessible equilibrium shapes. We also identify what determines the threshold volume. While this given system was studied previously in the literature using contact angle hysteresis laws, we present the full static thermodynamical solution of the interfacial energy including the contact energy, while omitting the hysteresis effects from the contact line.