Diffusive dynamics on paper matrix

Writing with ink on a paper and the rapid diagnostics of diseases using paper cartridge, despite their remarkable diversities from application perspective, both involve the motion of a liquid from a source on a porous hydrophilic substrate. Here we bring out a generalization in the pertinentdynamics by appealing to the concerned ensemble-averaged transport with reference to the underlying molecular picture. Our results reveal that notwithstanding the associated complexities and diversities, the resultant liquid transportcharacteristics on a paper matrix, in a wide variety of applications, resemble universal diffusivedynamics. Agreement with experimental results from diversified applications is generic and validates our unified theory.

Source: Applied Physics Letters - November 29, 2016 Category: Physics Authors: Kaustav Chaudhury, Shantimoy Kar and Suman Chakraborty Source Type: research