Journal
APPLIED PHYSICS LETTERS
Volume 109, Issue 22, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4966992
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Funding
- Indian Institute of Technology Kharagpur, India [IIT/SRIC/ATDC/CEM/2013-14/118]
- Royal Academy of Engineering, London, UK [HEPI\1516\27]
- Council of Scientific and Industrial Research (CSIR)
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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 pertinent dynamics 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 transport characteristics on a paper matrix, in a wide variety of applications, resemble universal diffusive dynamics. Agreement with experimental results from diversified applications is generic and validates our unified theory. Published by AIP Publishing.
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