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Janus nematic colloids with designable valence
ID Čopar, Simon (Author), ID Ravnik, Miha (Author), ID Žumer, Slobodan (Author)

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Abstract
Generalized Janus nematic colloids based on various morphologies of particle surface patches imposing homeotropic and planar surface anchoring are demonstrated. By using mesoscopic numerical modeling, multiple types of Janus particles are explored, demonstrating a variety of novel complex colloidal structures. We also show binding of Janus particles to a fixed Janus post in the nematic cell, which acts as a seed and a micro-anchor for the colloidal structure. Janus colloidal structures reveal diverse topological defect configurations, which are effectively combinations of surface boojum and bulk defects. Topological analysis is applied to defects, importantly showing that topological charge is not a well determined topological invariant in such patchy nematic Janus colloids. Finally, this work demonstrates colloidal structures with designable valence, which could allow for targeted and valence-conditioned self-assembly at micro- and nano-scale.

Language:English
Keywords:Janus colloids, nematic liquid crystals, surface anchoring, valence
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FMF - Faculty of Mathematics and Physics
Publication status:Published
Publication version:Version of Record
Year:2014
Number of pages:Str. 4272-4281
Numbering:Vol. 7, iss. 6
PID:20.500.12556/RUL-130818 This link opens in a new window
UDC:544.25
ISSN on article:1996-1944
DOI:10.3390/ma7064272 This link opens in a new window
COBISS.SI-ID:2683236 This link opens in a new window
Publication date in RUL:17.09.2021
Views:629
Downloads:131
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Record is a part of a journal

Title:Materials
Shortened title:Materials
Publisher:Molecular Diversity Preservation International
ISSN:1996-1944
COBISS.SI-ID:33588485 This link opens in a new window

Licences

License:CC BY 3.0, Creative Commons Attribution 3.0 Unported
Link:https://creativecommons.org/licenses/by/3.0/deed.en
Description:You are free to reproduce and redistribute the material in any medium or format. You are free to remix, transform, and build upon the material for any purpose, even commercially. You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
Licensing start date:30.05.2014

Projects

Funder:ARRS - Slovenian Research Agency
Project number:Z1-5441
Name:Fluidika aktivnih in kompleksnih tekočin na mikroskali

Funder:ARRS - Slovenian Research Agency
Project number:P1-0099
Name:Fizika mehkih snovi, površin in nanostruktur

Funder:EC - European Commission
Funding programme:FP7
Project number:304040
Name:Channelfree liquid crystal microfluidics
Acronym:FREEFLUID

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