Electrically modulated dynamic spreading of drops on soft surfaces

Dey, Ranabir ; Daga, Ashish ; DasGupta, Sunando ; Chakraborty, Suman (2015) Electrically modulated dynamic spreading of drops on soft surfaces Applied Physics Letters, 107 (3). Article ID 034101. ISSN 0003-6951

Full text not available from this repository.

Official URL: http://scitation.aip.org/content/aip/journal/apl/1...

Related URL: http://dx.doi.org/10.1063/1.4927307


The intricate interaction between the deformability of a substrate and the dynamic spreading of a liquid drop on the same, under the application of an electrical voltage, has remained far from being well understood. Here, we demonstrate that electrospreading dynamics on soft substrates is dictated by the combined interplay of electrocapillarity, the wetting line friction, and the viscoelastic energy dissipation at the contact line. Our results reveal that during such electro-elastocapillarity mediated spreading of a sessile drop, the contact radius evolution exhibits a universal power-law in a substrate elasticity based non-dimensional time, with an electrical voltage dependent spreading exponent. Simultaneously, the macroscopic dynamic contact angle variation follows a general power-law in the contact line velocity, normalized by elasticity dependent characteristic velocity scale. These findings will be beneficial for comprehending droplet spreading dynamics stemming from the combination of electrically modulated spreading and “soft wetting.” Hence, our results are likely to provide the foundation for the development of a plethora of applications involving droplet manipulations by exploiting the interplay between electrically triggered spreading and substrate-compliance over interfacial scales.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
ID Code:100298
Deposited On:08 Nov 2016 05:14
Last Modified:08 Nov 2016 05:14

Repository Staff Only: item control page