Hierarchical spatial heterogeneity in liquid crystals composed of graphene oxides

Atsuomi Shundo, Koichiro Hori, David P. Penaloza, Yuji Matsumoto, Yasushi Okumura, Hirotsugu Kikuchi, Kyung Eun Lee, Sang Ouk Kim, Keiji Tanaka

研究成果: ジャーナルへの寄稿記事

7 引用 (Scopus)

抄録

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.

元の言語英語
ページ(範囲)22399-22406
ページ数8
ジャーナルPhysical Chemistry Chemical Physics
18
発行部数32
DOI
出版物ステータス出版済み - 1 1 2016

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Liquid Crystals
Graphite
Oxides
graphene
liquid crystals
oxides
particle diffusion
trapped particles
micrometers
Microscopic examination
Carbon
Agglomeration
Physical properties
physical properties
Crystal structure
microscopy
Scanning
Fabrication
fabrication
crystal structure

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

これを引用

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.

:: Physical Chemistry Chemical Physics, 巻 18, 番号 32, 01.01.2016, p. 22399-22406.

研究成果: ジャーナルへの寄稿記事

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. :: Physical Chemistry Chemical Physics. 2016 ; 巻 18, 番号 32. pp. 22399-22406.
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AU - Okumura, Yasushi

AU - Kikuchi, Hirotsugu

AU - Lee, Kyung Eun

AU - Kim, Sang Ouk

AU - Tanaka, Keiji

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