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Microchannels with Self-Pumping Walls
[Image: see text] When asymmetric Janus micromotors are immobilized on a surface, they act as chemically powered micropumps, turning chemical energy from the fluid into a bulk flow. However, such pumps have previously produced only localized recirculating flows, which cannot be used to pump fluid in...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American
Chemical Society
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7596775/ https://www.ncbi.nlm.nih.gov/pubmed/32946220 http://dx.doi.org/10.1021/acsnano.0c05826 |
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author | Yu, Tingting Athanassiadis, Athanasios G. Popescu, Mihail N. Chikkadi, Vijayakumar Güth, Achim Singh, Dhruv P. Qiu, Tian Fischer, Peer |
author_facet | Yu, Tingting Athanassiadis, Athanasios G. Popescu, Mihail N. Chikkadi, Vijayakumar Güth, Achim Singh, Dhruv P. Qiu, Tian Fischer, Peer |
author_sort | Yu, Tingting |
collection | PubMed |
description | [Image: see text] When asymmetric Janus micromotors are immobilized on a surface, they act as chemically powered micropumps, turning chemical energy from the fluid into a bulk flow. However, such pumps have previously produced only localized recirculating flows, which cannot be used to pump fluid in one direction. Here, we demonstrate that an array of three-dimensional, photochemically active Au/TiO(2) Janus pillars can pump water. Upon UV illumination, a water-splitting reaction rapidly creates a directional bulk flow above the active surface. By lining a 2D microchannel with such active surfaces, various flow profiles are created within the channels. Analytical and numerical models of a channel with active surfaces predict flow profiles that agree very well with the experimental results. The light-driven active surfaces provide a way to wirelessly pump fluids at small scales and could be used for real-time, localized flow control in complex microfluidic networks. |
format | Online Article Text |
id | pubmed-7596775 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American
Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-75967752020-10-30 Microchannels with Self-Pumping Walls Yu, Tingting Athanassiadis, Athanasios G. Popescu, Mihail N. Chikkadi, Vijayakumar Güth, Achim Singh, Dhruv P. Qiu, Tian Fischer, Peer ACS Nano [Image: see text] When asymmetric Janus micromotors are immobilized on a surface, they act as chemically powered micropumps, turning chemical energy from the fluid into a bulk flow. However, such pumps have previously produced only localized recirculating flows, which cannot be used to pump fluid in one direction. Here, we demonstrate that an array of three-dimensional, photochemically active Au/TiO(2) Janus pillars can pump water. Upon UV illumination, a water-splitting reaction rapidly creates a directional bulk flow above the active surface. By lining a 2D microchannel with such active surfaces, various flow profiles are created within the channels. Analytical and numerical models of a channel with active surfaces predict flow profiles that agree very well with the experimental results. The light-driven active surfaces provide a way to wirelessly pump fluids at small scales and could be used for real-time, localized flow control in complex microfluidic networks. American Chemical Society 2020-09-18 2020-10-27 /pmc/articles/PMC7596775/ /pubmed/32946220 http://dx.doi.org/10.1021/acsnano.0c05826 Text en This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
spellingShingle | Yu, Tingting Athanassiadis, Athanasios G. Popescu, Mihail N. Chikkadi, Vijayakumar Güth, Achim Singh, Dhruv P. Qiu, Tian Fischer, Peer Microchannels with Self-Pumping Walls |
title | Microchannels
with Self-Pumping Walls |
title_full | Microchannels
with Self-Pumping Walls |
title_fullStr | Microchannels
with Self-Pumping Walls |
title_full_unstemmed | Microchannels
with Self-Pumping Walls |
title_short | Microchannels
with Self-Pumping Walls |
title_sort | microchannels
with self-pumping walls |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7596775/ https://www.ncbi.nlm.nih.gov/pubmed/32946220 http://dx.doi.org/10.1021/acsnano.0c05826 |
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