Rheology of thermotropic liquid-crystalline dendron-modified gold nanoparticles

Masaki Matsubara; Atsushi Miyazaki; Xiangbing Zeng; Atsushi Muramatsu; Goran Ungar; Kiyoshi Kanie

doi:10.1080/15421406.2015.1075818

Rheology of thermotropic liquid-crystalline dendron-modified gold nanoparticles

Masaki Matsubara, Atsushi Miyazaki, Xiangbing Zeng, Atsushi Muramatsu, Goran Ungar, Kiyoshi Kanie

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Rheological behavior across thermal phase transitions of liquid crystalline (LC) structures has been investigated using dendron-modified LC gold nanoparticles (NPs) prepared by surface modification of spherical gold NPs with LC dendrons. Such dendron-modified gold NPs self-organize to form a columnar LC structure that transforms to a simple cubic LC structure with increasing temperature. Endo- and exothermic peaks associated with this phase transition are barely observable. However, using dynamic viscoelastic measurements, the transition was observed as a drastic increase in fluidity of the dendron modified gold NPs.

Original language	English
Pages (from-to)	50-57
Number of pages	8
Journal	Molecular crystals and liquid crystals
Volume	617
Issue number	1
DOIs	https://doi.org/10.1080/15421406.2015.1075818
Publication status	Published - 2015 Aug 13

Keywords

Dendrimer
Gold Nanoparticle
Liquid Crystal
Organic-Inorganic Hybrid Material
Rheology

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1080/15421406.2015.1075818

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title = "Rheology of thermotropic liquid-crystalline dendron-modified gold nanoparticles",

abstract = "Rheological behavior across thermal phase transitions of liquid crystalline (LC) structures has been investigated using dendron-modified LC gold nanoparticles (NPs) prepared by surface modification of spherical gold NPs with LC dendrons. Such dendron-modified gold NPs self-organize to form a columnar LC structure that transforms to a simple cubic LC structure with increasing temperature. Endo- and exothermic peaks associated with this phase transition are barely observable. However, using dynamic viscoelastic measurements, the transition was observed as a drastic increase in fluidity of the dendron modified gold NPs.",

keywords = "Dendrimer, Gold Nanoparticle, Liquid Crystal, Organic-Inorganic Hybrid Material, Rheology",

author = "Masaki Matsubara and Atsushi Miyazaki and Xiangbing Zeng and Atsushi Muramatsu and Goran Ungar and Kiyoshi Kanie",

note = "Funding Information: This work was financially supported by JSPS (Research fellowship for young scientists No. 24 •9313 (MM), Grant-in-aid for young scientific research (A) No. 22685019 (KK), Grant-in-aid for scientific research (B) No. 25288087 (KK), and Bilateral Joint Research Projects (KK)). We acknowledge financial support from the Asahi Glass Foundation (KK) and METI & NEDO Super Hybrid Materials Development Project (AM, KK). Publisher Copyright: Copyright {\textcopyright} Taylor & Francis Group, LLC.",

year = "2015",

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doi = "10.1080/15421406.2015.1075818",

language = "English",

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T1 - Rheology of thermotropic liquid-crystalline dendron-modified gold nanoparticles

AU - Matsubara, Masaki

AU - Miyazaki, Atsushi

AU - Zeng, Xiangbing

AU - Muramatsu, Atsushi

AU - Ungar, Goran

AU - Kanie, Kiyoshi

N1 - Funding Information: This work was financially supported by JSPS (Research fellowship for young scientists No. 24 •9313 (MM), Grant-in-aid for young scientific research (A) No. 22685019 (KK), Grant-in-aid for scientific research (B) No. 25288087 (KK), and Bilateral Joint Research Projects (KK)). We acknowledge financial support from the Asahi Glass Foundation (KK) and METI & NEDO Super Hybrid Materials Development Project (AM, KK). Publisher Copyright: Copyright © Taylor & Francis Group, LLC.

PY - 2015/8/13

Y1 - 2015/8/13

N2 - Rheological behavior across thermal phase transitions of liquid crystalline (LC) structures has been investigated using dendron-modified LC gold nanoparticles (NPs) prepared by surface modification of spherical gold NPs with LC dendrons. Such dendron-modified gold NPs self-organize to form a columnar LC structure that transforms to a simple cubic LC structure with increasing temperature. Endo- and exothermic peaks associated with this phase transition are barely observable. However, using dynamic viscoelastic measurements, the transition was observed as a drastic increase in fluidity of the dendron modified gold NPs.

AB - Rheological behavior across thermal phase transitions of liquid crystalline (LC) structures has been investigated using dendron-modified LC gold nanoparticles (NPs) prepared by surface modification of spherical gold NPs with LC dendrons. Such dendron-modified gold NPs self-organize to form a columnar LC structure that transforms to a simple cubic LC structure with increasing temperature. Endo- and exothermic peaks associated with this phase transition are barely observable. However, using dynamic viscoelastic measurements, the transition was observed as a drastic increase in fluidity of the dendron modified gold NPs.

KW - Dendrimer

KW - Gold Nanoparticle

KW - Liquid Crystal

KW - Organic-Inorganic Hybrid Material

KW - Rheology

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JF - Molecular Crystals and Liquid Crystals

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Rheology of thermotropic liquid-crystalline dendron-modified gold nanoparticles

Abstract

Keywords

ASJC Scopus subject areas

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