Gradient induced liquid motion on laser structured black Si surfaces
Fluid Dynamics
2015-09-16 v1 Materials Science
Abstract
This letter reports on the femtosecond laser fabrication of gradient-wettability micro/nano- patterns on Si surfaces. The dynamics of directional droplet spreading on the surface tension gradients developed is systematically investigated and discussed. It is shown that microdroplets on the patterned surfaces spread at a maximum speed of 505 mm/sec, that is the highest velocity demonstrated so far for liquid spreading on a surface tension gradient in ambient conditions. The application of the proposed laser patterning technique for the precise fabrication of surface tension gradients for open microfluidic systems, liquid management in fuel cells and drug delivery is envisaged.
Keywords
Cite
@article{arxiv.1509.04435,
title = {Gradient induced liquid motion on laser structured black Si surfaces},
author = {I. Paradisanos and C. Fotakis and S. H. Anastasiadis and E. Stratakis},
journal= {arXiv preprint arXiv:1509.04435},
year = {2015}
}
Comments
14 pages, 4 figures