Comment on "patterns in drying drops dictated by curvature-driven particle transport"

© 2019 American Chemical Society. In a recent article, Mondal et al. (Mondal, R.; Semwal, S.; Kumar, P. L.; Thampi, S. P.; Basavaraj, M. G. Langmuir 2018, 34, 11473-11483) demonstrated different patterns (coffee-rings and coffee-eyes) in dry deposits from solutions of concentrated well-stabilized na...

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Main Authors: Chris S. Hodges, S. Mick Tangparitkul
Format: Journal
Published: 2019
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-666262019-09-16T12:59:52Z Comment on "patterns in drying drops dictated by curvature-driven particle transport" Chris S. Hodges S. Mick Tangparitkul Chemistry Materials Science Physics and Astronomy © 2019 American Chemical Society. In a recent article, Mondal et al. (Mondal, R.; Semwal, S.; Kumar, P. L.; Thampi, S. P.; Basavaraj, M. G. Langmuir 2018, 34, 11473-11483) demonstrated different patterns (coffee-rings and coffee-eyes) in dry deposits from solutions of concentrated well-stabilized nanofluids. Coffee rings created from dried sessile droplets result mainly from internal radial flow as proposed by Deegan et al. (Deegan, R. D.; Bakajin, O.; Dupont, T. F.; Huber, G.; Nagel, S. R.; Witten, T. A. Nature 1997, 389, 827-829). To generate coffee-eyes from pendent droplets, Mondal et al. have proposed a new particle transport route involving particle adsorption at the interface and its consequent curvature-driven settling along the interface due to gravity acting on the droplet. In this comment, we demonstrate that coffee-eyes can also be formed from pendent droplets by increasing the nanoparticle size to destabilize the colloidal liquid, causing nanoparticle accumulation at the water droplet apex without particle adsorption at the interface. 2019-09-16T12:49:26Z 2019-09-16T12:49:26Z 2019-07-30 Journal 15205827 07437463 2-s2.0-85070563303 10.1021/acs.langmuir.9b01442 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85070563303&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/66626
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Chemistry
Materials Science
Physics and Astronomy
spellingShingle Chemistry
Materials Science
Physics and Astronomy
Chris S. Hodges
S. Mick Tangparitkul
Comment on "patterns in drying drops dictated by curvature-driven particle transport"
description © 2019 American Chemical Society. In a recent article, Mondal et al. (Mondal, R.; Semwal, S.; Kumar, P. L.; Thampi, S. P.; Basavaraj, M. G. Langmuir 2018, 34, 11473-11483) demonstrated different patterns (coffee-rings and coffee-eyes) in dry deposits from solutions of concentrated well-stabilized nanofluids. Coffee rings created from dried sessile droplets result mainly from internal radial flow as proposed by Deegan et al. (Deegan, R. D.; Bakajin, O.; Dupont, T. F.; Huber, G.; Nagel, S. R.; Witten, T. A. Nature 1997, 389, 827-829). To generate coffee-eyes from pendent droplets, Mondal et al. have proposed a new particle transport route involving particle adsorption at the interface and its consequent curvature-driven settling along the interface due to gravity acting on the droplet. In this comment, we demonstrate that coffee-eyes can also be formed from pendent droplets by increasing the nanoparticle size to destabilize the colloidal liquid, causing nanoparticle accumulation at the water droplet apex without particle adsorption at the interface.
format Journal
author Chris S. Hodges
S. Mick Tangparitkul
author_facet Chris S. Hodges
S. Mick Tangparitkul
author_sort Chris S. Hodges
title Comment on "patterns in drying drops dictated by curvature-driven particle transport"
title_short Comment on "patterns in drying drops dictated by curvature-driven particle transport"
title_full Comment on "patterns in drying drops dictated by curvature-driven particle transport"
title_fullStr Comment on "patterns in drying drops dictated by curvature-driven particle transport"
title_full_unstemmed Comment on "patterns in drying drops dictated by curvature-driven particle transport"
title_sort comment on "patterns in drying drops dictated by curvature-driven particle transport"
publishDate 2019
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85070563303&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/66626
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