Hierarchical spatial heterogeneity in liquid crystals composed of graphene oxides

Graphene oxide (GO) is a class of two-dimensional materials with a thickness of about 1 nm and a broad distribution of lateral dimension commonly approaching several micrometers. A dispersion of GOs in water often forms a liquid crystal, which is expected to be a promising precursor for the fabricat...

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Main Authors: Shundo, Atsuomi, Hori, Koichiro, Penaloza, David P., Matsumoto, Yuji, Okumura, Yasushi, Kikuchi, Hirotsugu, Lee, Kyung Eun, Kim, Sang Ouk, Tanaka, Keiji
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Published: Animo Repository 2016
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Online Access:https://animorepository.dlsu.edu.ph/faculty_research/4460
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spelling oai:animorepository.dlsu.edu.ph:faculty_research-52722022-01-02T08:27:08Z Hierarchical spatial heterogeneity in liquid crystals composed of graphene oxides Shundo, Atsuomi Hori, Koichiro Penaloza, David P. Matsumoto, Yuji Okumura, Yasushi Kikuchi, Hirotsugu Lee, Kyung Eun Kim, Sang Ouk Tanaka, Keiji Graphene oxide (GO) is a class of two-dimensional materials with a thickness of about 1 nm and a broad distribution of lateral dimension commonly approaching several micrometers. A dispersion of GOs in water often forms a liquid crystal, which is expected to be a promising precursor for the fabrication of carbon-based materials with well-ordered structures. To accelerate the application of GO-based liquid crystals, their structures and physical properties at various sizes must be well understood. To that end, we examined the local rheological properties of GO-based liquid crystals in the nematic phase using a particle tracking technique, where local properties can be accessed by observing the thermal motion of embedded probe particles. Particle diffusion was spatially heterogeneous, and depended on the size of the particles. Such a size-dependent heterogeneity can be associated with a hierarchical local environment, which is time-dependent for this system. The anisotropic particle diffusion originated from particles trapped in between the GO layers and in isotropic-like regions. The aggregation states of the GO dispersion composed of nematic and isotropic-like regions were observed using confocal laser scanning microscopy. © the Owner Societies 2016. 2016-01-01T08:00:00Z text https://animorepository.dlsu.edu.ph/faculty_research/4460 info:doi/10.1039/c6cp03614g Faculty Research Work Animo Repository Graphene Oxides Liquid crystals Chemistry
institution De La Salle University
building De La Salle University Library
continent Asia
country Philippines
Philippines
content_provider De La Salle University Library
collection DLSU Institutional Repository
topic Graphene
Oxides
Liquid crystals
Chemistry
spellingShingle Graphene
Oxides
Liquid crystals
Chemistry
Shundo, Atsuomi
Hori, Koichiro
Penaloza, David P.
Matsumoto, Yuji
Okumura, Yasushi
Kikuchi, Hirotsugu
Lee, Kyung Eun
Kim, Sang Ouk
Tanaka, Keiji
Hierarchical spatial heterogeneity in liquid crystals composed of graphene oxides
description Graphene oxide (GO) is a class of two-dimensional materials with a thickness of about 1 nm and a broad distribution of lateral dimension commonly approaching several micrometers. A dispersion of GOs in water often forms a liquid crystal, which is expected to be a promising precursor for the fabrication of carbon-based materials with well-ordered structures. To accelerate the application of GO-based liquid crystals, their structures and physical properties at various sizes must be well understood. To that end, we examined the local rheological properties of GO-based liquid crystals in the nematic phase using a particle tracking technique, where local properties can be accessed by observing the thermal motion of embedded probe particles. Particle diffusion was spatially heterogeneous, and depended on the size of the particles. Such a size-dependent heterogeneity can be associated with a hierarchical local environment, which is time-dependent for this system. The anisotropic particle diffusion originated from particles trapped in between the GO layers and in isotropic-like regions. The aggregation states of the GO dispersion composed of nematic and isotropic-like regions were observed using confocal laser scanning microscopy. © the Owner Societies 2016.
format text
author Shundo, Atsuomi
Hori, Koichiro
Penaloza, David P.
Matsumoto, Yuji
Okumura, Yasushi
Kikuchi, Hirotsugu
Lee, Kyung Eun
Kim, Sang Ouk
Tanaka, Keiji
author_facet Shundo, Atsuomi
Hori, Koichiro
Penaloza, David P.
Matsumoto, Yuji
Okumura, Yasushi
Kikuchi, Hirotsugu
Lee, Kyung Eun
Kim, Sang Ouk
Tanaka, Keiji
author_sort Shundo, Atsuomi
title Hierarchical spatial heterogeneity in liquid crystals composed of graphene oxides
title_short Hierarchical spatial heterogeneity in liquid crystals composed of graphene oxides
title_full Hierarchical spatial heterogeneity in liquid crystals composed of graphene oxides
title_fullStr Hierarchical spatial heterogeneity in liquid crystals composed of graphene oxides
title_full_unstemmed Hierarchical spatial heterogeneity in liquid crystals composed of graphene oxides
title_sort hierarchical spatial heterogeneity in liquid crystals composed of graphene oxides
publisher Animo Repository
publishDate 2016
url https://animorepository.dlsu.edu.ph/faculty_research/4460
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