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Simultaneous Multidrop Creation with Superhydrophobic Wells for Field Environmental Sensing of Nanoparticles

[Image: see text] Facile creation of multiple drops at appropriate volumes on surfaces without the use of sophisticated instrumentation facilitates downstream evaporative preconcentration of liquid samples for analytical purposes. In this work, a superhydrophobic (SH) substrate comprising wells with...

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Autores principales: Chung, Dwayne Chung Kim, Huynh, So Hung, Ahmad Zahidi, Alifa Afiah, Liew, Oi Wah, Ng, Tuck Wah
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2018
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6644516/
https://www.ncbi.nlm.nih.gov/pubmed/31459064
http://dx.doi.org/10.1021/acsomega.8b00919
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author Chung, Dwayne Chung Kim
Huynh, So Hung
Ahmad Zahidi, Alifa Afiah
Liew, Oi Wah
Ng, Tuck Wah
author_facet Chung, Dwayne Chung Kim
Huynh, So Hung
Ahmad Zahidi, Alifa Afiah
Liew, Oi Wah
Ng, Tuck Wah
author_sort Chung, Dwayne Chung Kim
collection PubMed
description [Image: see text] Facile creation of multiple drops at appropriate volumes on surfaces without the use of sophisticated instrumentation facilitates downstream evaporative preconcentration of liquid samples for analytical purposes. In this work, a superhydrophobic (SH) substrate comprising wells with a perforated mesh base was developed for simultaneous drop creation in a quick and convenient manner. In contrast to the method of pouring liquid directly over the SH wells, consistent liquid filling was readily achieved by a simple immersion approach. This method works well even for challenging situations where well diameters are smaller than 3.4 mm. Despite the poor liquid-retention properties of SH surfaces, inverting the wells did not result in liquid detachment under gravitational force, indicating strong pinning effects afforded by the well architecture. The perforated base of the well allowed the liquid to be completely removed from the well by compressed air. High-speed camera image processing was used to study the evolution of drop contact angle and displacement with time. It was found that the liquid body was able to undergo strong oscillations. Optical spectroscopy was used to confirm the ability of evaporative preconcentration of silver nanoparticles.
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spelling pubmed-66445162019-08-27 Simultaneous Multidrop Creation with Superhydrophobic Wells for Field Environmental Sensing of Nanoparticles Chung, Dwayne Chung Kim Huynh, So Hung Ahmad Zahidi, Alifa Afiah Liew, Oi Wah Ng, Tuck Wah ACS Omega [Image: see text] Facile creation of multiple drops at appropriate volumes on surfaces without the use of sophisticated instrumentation facilitates downstream evaporative preconcentration of liquid samples for analytical purposes. In this work, a superhydrophobic (SH) substrate comprising wells with a perforated mesh base was developed for simultaneous drop creation in a quick and convenient manner. In contrast to the method of pouring liquid directly over the SH wells, consistent liquid filling was readily achieved by a simple immersion approach. This method works well even for challenging situations where well diameters are smaller than 3.4 mm. Despite the poor liquid-retention properties of SH surfaces, inverting the wells did not result in liquid detachment under gravitational force, indicating strong pinning effects afforded by the well architecture. The perforated base of the well allowed the liquid to be completely removed from the well by compressed air. High-speed camera image processing was used to study the evolution of drop contact angle and displacement with time. It was found that the liquid body was able to undergo strong oscillations. Optical spectroscopy was used to confirm the ability of evaporative preconcentration of silver nanoparticles. American Chemical Society 2018-08-16 /pmc/articles/PMC6644516/ /pubmed/31459064 http://dx.doi.org/10.1021/acsomega.8b00919 Text en Copyright © 2018 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Chung, Dwayne Chung Kim
Huynh, So Hung
Ahmad Zahidi, Alifa Afiah
Liew, Oi Wah
Ng, Tuck Wah
Simultaneous Multidrop Creation with Superhydrophobic Wells for Field Environmental Sensing of Nanoparticles
title Simultaneous Multidrop Creation with Superhydrophobic Wells for Field Environmental Sensing of Nanoparticles
title_full Simultaneous Multidrop Creation with Superhydrophobic Wells for Field Environmental Sensing of Nanoparticles
title_fullStr Simultaneous Multidrop Creation with Superhydrophobic Wells for Field Environmental Sensing of Nanoparticles
title_full_unstemmed Simultaneous Multidrop Creation with Superhydrophobic Wells for Field Environmental Sensing of Nanoparticles
title_short Simultaneous Multidrop Creation with Superhydrophobic Wells for Field Environmental Sensing of Nanoparticles
title_sort simultaneous multidrop creation with superhydrophobic wells for field environmental sensing of nanoparticles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6644516/
https://www.ncbi.nlm.nih.gov/pubmed/31459064
http://dx.doi.org/10.1021/acsomega.8b00919
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