Substrate wettability guided oriented self assembly of Janus particles

Abstract 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 surfa...

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Autores principales:	Meneka Banik, Shaili Sett, Chirodeep Bakli, Arup Kumar Raychaudhuri, Suman Chakraborty, Rabibrata Mukherjee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/abef8e048f274203a253810ee1091c79
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spelling	oai:doaj.org-article:abef8e048f274203a253810ee1091c792021-12-02T15:23:08ZSubstrate wettability guided oriented self assembly of Janus particles10.1038/s41598-020-80760-w2045-2322https://doaj.org/article/abef8e048f274203a253810ee1091c792021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80760-whttps://doaj.org/toc/2045-2322Abstract 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.Meneka BanikShaili SettChirodeep BakliArup Kumar RaychaudhuriSuman ChakrabortyRabibrata MukherjeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Meneka Banik Shaili Sett Chirodeep Bakli Arup Kumar Raychaudhuri Suman Chakraborty Rabibrata Mukherjee Substrate wettability guided oriented self assembly of Janus particles
description	Abstract 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.
format	article
author	Meneka Banik Shaili Sett Chirodeep Bakli Arup Kumar Raychaudhuri Suman Chakraborty Rabibrata Mukherjee
author_facet	Meneka Banik Shaili Sett Chirodeep Bakli Arup Kumar Raychaudhuri Suman Chakraborty Rabibrata Mukherjee
author_sort	Meneka Banik
title	Substrate wettability guided oriented self assembly of Janus particles
title_short	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_sort	substrate wettability guided oriented self assembly of janus particles
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/abef8e048f274203a253810ee1091c79
work_keys_str_mv	AT menekabanik substratewettabilityguidedorientedselfassemblyofjanusparticles AT shailisett substratewettabilityguidedorientedselfassemblyofjanusparticles AT chirodeepbakli substratewettabilityguidedorientedselfassemblyofjanusparticles AT arupkumarraychaudhuri substratewettabilityguidedorientedselfassemblyofjanusparticles AT sumanchakraborty substratewettabilityguidedorientedselfassemblyofjanusparticles AT rabibratamukherjee substratewettabilityguidedorientedselfassemblyofjanusparticles
_version_	1718387347121242112

Substrate wettability guided oriented self assembly of Janus particles

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