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Substrate wettability guided oriented self assembly of Janus particles

Self-assembly of Janus particles with spatial inhomogeneous properties is of fundamental importance in diverse areas of sciences and has been extensively observed as a favorably functionalized fluidic interface or in a dilute solution. Interestingly, the unique and non-trivial role of surface wettab...

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Autores principales: Banik, Meneka, Sett, Shaili, Bakli, Chirodeep, Raychaudhuri, Arup Kumar, Chakraborty, Suman, Mukherjee, Rabibrata
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7807062/
https://www.ncbi.nlm.nih.gov/pubmed/33441877
http://dx.doi.org/10.1038/s41598-020-80760-w
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author Banik, Meneka
Sett, Shaili
Bakli, Chirodeep
Raychaudhuri, Arup Kumar
Chakraborty, Suman
Mukherjee, Rabibrata
author_facet Banik, Meneka
Sett, Shaili
Bakli, Chirodeep
Raychaudhuri, Arup Kumar
Chakraborty, Suman
Mukherjee, Rabibrata
author_sort Banik, Meneka
collection PubMed
description Self-assembly of Janus particles with spatial inhomogeneous properties is of fundamental importance in diverse areas of sciences and has been extensively observed as a favorably functionalized fluidic interface or in a dilute solution. Interestingly, the unique and non-trivial role of surface wettability on oriented self-assembly of Janus particles has remained largely unexplored. Here, the exclusive role of substrate wettability in directing the orientation of amphiphilic metal-polymer Bifacial spherical Janus particles, obtained by topo-selective metal deposition on colloidal Polymestyere (PS) particles, is explored by drop casting a dilute dispersion of the Janus colloids. While all particles orient with their polymeric (hydrophobic) and metallic (hydrophilic) sides facing upwards on hydrophilic and hydrophobic substrates respectively, they exhibit random orientation on a neutral substrate. The substrate wettability guided orientation of the Janus particles is captured using molecular dynamic simulation, which highlights that the arrangement of water molecules and their local densities near the substrate guide the specific orientation. Finally, it is shown that by spin coating it becomes possible to create a hexagonal close-packed array of the Janus colloids with specific orientation on differential wettability substrates. The results reported here open up new possibilities of substrate-wettability driven functional coatings of Janus particles, which has hitherto remained unexplored.
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spelling pubmed-78070622021-01-14 Substrate wettability guided oriented self assembly of Janus particles Banik, Meneka Sett, Shaili Bakli, Chirodeep Raychaudhuri, Arup Kumar Chakraborty, Suman Mukherjee, Rabibrata Sci Rep Article Self-assembly of Janus particles with spatial inhomogeneous properties is of fundamental importance in diverse areas of sciences and has been extensively observed as a favorably functionalized fluidic interface or in a dilute solution. Interestingly, the unique and non-trivial role of surface wettability on oriented self-assembly of Janus particles has remained largely unexplored. Here, the exclusive role of substrate wettability in directing the orientation of amphiphilic metal-polymer Bifacial spherical Janus particles, obtained by topo-selective metal deposition on colloidal Polymestyere (PS) particles, is explored by drop casting a dilute dispersion of the Janus colloids. While all particles orient with their polymeric (hydrophobic) and metallic (hydrophilic) sides facing upwards on hydrophilic and hydrophobic substrates respectively, they exhibit random orientation on a neutral substrate. The substrate wettability guided orientation of the Janus particles is captured using molecular dynamic simulation, which highlights that the arrangement of water molecules and their local densities near the substrate guide the specific orientation. Finally, it is shown that by spin coating it becomes possible to create a hexagonal close-packed array of the Janus colloids with specific orientation on differential wettability substrates. The results reported here open up new possibilities of substrate-wettability driven functional coatings of Janus particles, which has hitherto remained unexplored. Nature Publishing Group UK 2021-01-13 /pmc/articles/PMC7807062/ /pubmed/33441877 http://dx.doi.org/10.1038/s41598-020-80760-w Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Banik, Meneka
Sett, Shaili
Bakli, Chirodeep
Raychaudhuri, Arup Kumar
Chakraborty, Suman
Mukherjee, Rabibrata
Substrate wettability guided oriented self assembly of Janus particles
title Substrate wettability guided oriented self assembly of Janus particles
title_full Substrate wettability guided oriented self assembly of Janus particles
title_fullStr Substrate wettability guided oriented self assembly of Janus particles
title_full_unstemmed Substrate wettability guided oriented self assembly of Janus particles
title_short Substrate wettability guided oriented self assembly of Janus particles
title_sort substrate wettability guided oriented self assembly of janus particles
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7807062/
https://www.ncbi.nlm.nih.gov/pubmed/33441877
http://dx.doi.org/10.1038/s41598-020-80760-w
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