Nematic Order, Plasmonic Switching and Self‐Patterning of Colloidal Gold Bipyramids

Abstract Dispersing inorganic colloidal nanoparticles within nematic liquid crystals provides a versatile platform both for forming new soft matter phases and for predefining physical behavior through mesoscale molecular‐colloidal self‐organization. However, owing to formation of particle‐induced si...

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Autores principales:	Zhijian Mai, Ye Yuan, Jung‐Shen B. Tai, Bohdan Senyuk, Bing Liu, Hao Li, Yao Wang, Guofu Zhou, Ivan I. Smalyukh
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	bipyramid electric switching gold nanoparticles nematic order surface plasmon resonance topological soliton Science Q
Acceso en línea:	https://doaj.org/article/3b94810b40eb484ca47e7de8987a8063
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spelling	oai:doaj.org-article:3b94810b40eb484ca47e7de8987a80632021-11-17T08:40:31ZNematic Order, Plasmonic Switching and Self‐Patterning of Colloidal Gold Bipyramids2198-384410.1002/advs.202102854https://doaj.org/article/3b94810b40eb484ca47e7de8987a80632021-11-01T00:00:00Zhttps://doi.org/10.1002/advs.202102854https://doaj.org/toc/2198-3844Abstract Dispersing inorganic colloidal nanoparticles within nematic liquid crystals provides a versatile platform both for forming new soft matter phases and for predefining physical behavior through mesoscale molecular‐colloidal self‐organization. However, owing to formation of particle‐induced singular defects and complex elasticity‐mediated interactions, this approach has been implemented mainly just for colloidal nanorods and nanoplatelets, limiting its potential technological utility. Here, orientationally ordered nematic colloidal dispersions are reported of pentagonal gold bipyramids that exhibit narrow but controlled polarization‐dependent surface plasmon resonance spectra and facile electric switching. Bipyramids tend to orient with their C5 rotation symmetry axes along the nematic director, exhibiting spatially homogeneous density within aligned samples. Topological solitons, like heliknotons, allow for spatial reorganization of these nanoparticles according to elastic free energy density within their micrometer‐scale structures. With the nanoparticle orientations slaved to the nematic director and being switched by low voltages ≈1 V within a fraction of a second, these plasmonic composite materials are of interest for technological uses like color filters and plasmonic polarizers, as well as may lead to the development of unusual nematic phases, like pentatic liquid crystals.Zhijian MaiYe YuanJung‐Shen B. TaiBohdan SenyukBing LiuHao LiYao WangGuofu ZhouIvan I. SmalyukhWileyarticlebipyramidelectric switchinggold nanoparticlesnematic ordersurface plasmon resonancetopological solitonScienceQENAdvanced Science, Vol 8, Iss 22, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bipyramid electric switching gold nanoparticles nematic order surface plasmon resonance topological soliton Science Q
spellingShingle	bipyramid electric switching gold nanoparticles nematic order surface plasmon resonance topological soliton Science Q Zhijian Mai Ye Yuan Jung‐Shen B. Tai Bohdan Senyuk Bing Liu Hao Li Yao Wang Guofu Zhou Ivan I. Smalyukh Nematic Order, Plasmonic Switching and Self‐Patterning of Colloidal Gold Bipyramids
description	Abstract Dispersing inorganic colloidal nanoparticles within nematic liquid crystals provides a versatile platform both for forming new soft matter phases and for predefining physical behavior through mesoscale molecular‐colloidal self‐organization. However, owing to formation of particle‐induced singular defects and complex elasticity‐mediated interactions, this approach has been implemented mainly just for colloidal nanorods and nanoplatelets, limiting its potential technological utility. Here, orientationally ordered nematic colloidal dispersions are reported of pentagonal gold bipyramids that exhibit narrow but controlled polarization‐dependent surface plasmon resonance spectra and facile electric switching. Bipyramids tend to orient with their C5 rotation symmetry axes along the nematic director, exhibiting spatially homogeneous density within aligned samples. Topological solitons, like heliknotons, allow for spatial reorganization of these nanoparticles according to elastic free energy density within their micrometer‐scale structures. With the nanoparticle orientations slaved to the nematic director and being switched by low voltages ≈1 V within a fraction of a second, these plasmonic composite materials are of interest for technological uses like color filters and plasmonic polarizers, as well as may lead to the development of unusual nematic phases, like pentatic liquid crystals.
format	article
author	Zhijian Mai Ye Yuan Jung‐Shen B. Tai Bohdan Senyuk Bing Liu Hao Li Yao Wang Guofu Zhou Ivan I. Smalyukh
author_facet	Zhijian Mai Ye Yuan Jung‐Shen B. Tai Bohdan Senyuk Bing Liu Hao Li Yao Wang Guofu Zhou Ivan I. Smalyukh
author_sort	Zhijian Mai
title	Nematic Order, Plasmonic Switching and Self‐Patterning of Colloidal Gold Bipyramids
title_short	Nematic Order, Plasmonic Switching and Self‐Patterning of Colloidal Gold Bipyramids
title_full	Nematic Order, Plasmonic Switching and Self‐Patterning of Colloidal Gold Bipyramids
title_fullStr	Nematic Order, Plasmonic Switching and Self‐Patterning of Colloidal Gold Bipyramids
title_full_unstemmed	Nematic Order, Plasmonic Switching and Self‐Patterning of Colloidal Gold Bipyramids
title_sort	nematic order, plasmonic switching and self‐patterning of colloidal gold bipyramids
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/3b94810b40eb484ca47e7de8987a8063
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Nematic Order, Plasmonic Switching and Self‐Patterning of Colloidal Gold Bipyramids

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