Morphological transformation of surface femtodroplets upon dissolution

Peng, S, Pinchasik, B, Mohwald, H and Zhang, X 2017, 'Morphological transformation of surface femtodroplets upon dissolution', Journal of Physical Chemistry Letters, vol. 8, no. 3, pp. 584-590.


Document type: Journal Article
Collection: Journal Articles

Title Morphological transformation of surface femtodroplets upon dissolution
Author(s) Peng, S
Pinchasik, B
Mohwald, H
Zhang, X
Year 2017
Journal name Journal of Physical Chemistry Letters
Volume number 8
Issue number 3
Start page 584
End page 590
Total pages 7
Publisher American Chemical Society
Abstract Constructing controllable liquid patterns with high resolution and accuracy is of great importance in droplet depositions for a range of applications. Simple surface chemical micropatterns have been popularly used to regulate the shape of liquid droplets and the final structure of deposited materials. In this work, we study the morphological evolution of a dissolving femtoliter droplet pinned on multiple microdomains. On the basis of minimization of interfacial energy, the numerical simulations predict various symmetric droplet profiles in equilibrium at different liquid volumes. However, our experimental results show both symmetric and asymmetric shapes of droplets due to contact line pinning and symmetry breaking during droplet dissolution. Upon slow volume reduction, the deposited microdroplet arrays on one single type of simple surface prepatterns spontaneously morphed into a series of complex regular 3D shapes. The findings in this work offer insights into design and prepararion of the rich and complex morphology of liquid patterns via simple surface premicropatterns.
Subject Physical Sciences not elsewhere classified
DOI - identifier 10.1021/acs.jpclett.6b02861
Copyright notice © 2017 American Chemical Society.
ISSN 1948-7185
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