Dispersion and magnetic field-induced alignment of functionalized carbon nanotubes in liquid crystals

Hye Jin Yoo; Sun Young Lee; Nam Ho You; Dong Su Lee; Hyeonuk Yeo; Yong Mun Choi; Munju Goh; Jinwoo Park; Kazuo Akagi; Jae Whan Cho

doi:10.1016/j.synthmet.2013.07.023

Dispersion and magnetic field-induced alignment of functionalized carbon nanotubes in liquid crystals

Hye Jin Yoo, Sun Young Lee, Nam Ho You, Dong Su Lee, Hyeonuk Yeo, Yong Mun Choi, Munju Goh, Jinwoo Park, Kazuo Akagi, Jae Whan Cho

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

36 Scopus citations

Abstract

Liquid crystal (LC)-functionalized multi-walled carbon nanotubes (MWNTs) were synthesized by substituting decyloxy and phenylcyclohexyl (PCH) mesogenic moieties into MWNT surface through covalent linkage. The LC-functionalized MWNTs (LC-MWNTs) showed good dispersion stability in ethanol as well as good miscibility in a host thermotropic nematic LC (N-LC). A polarizing optical microscope image demonstrated that the LC-MWNTs could be well dispersed in the host N-LC within 5 wt% content of LC-MWNTs without aggregation, which is ascribed to the substantial affinity between the PCH moieties and the host N-LC molecules. It was found that the LC-MWNTs in the host LC matrix could be well aligned parallel to the direction of the applied magnetic field of 5 T. Then the high order parameter of 0.46 for LC-MWNTs was obtained from the measurement of polarized Raman spectroscopy.

Original language	English
Pages (from-to)	10-17
Number of pages	8
Journal	Synthetic Metals
Volume	181
DOIs	https://doi.org/10.1016/j.synthmet.2013.07.023
State	Published - 2013

Keywords

Carbon nanotube
Functionalized carbon nanotube
Liquid crystal
Magnetic alignment

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10.1016/j.synthmet.2013.07.023

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title = "Dispersion and magnetic field-induced alignment of functionalized carbon nanotubes in liquid crystals",

abstract = "Liquid crystal (LC)-functionalized multi-walled carbon nanotubes (MWNTs) were synthesized by substituting decyloxy and phenylcyclohexyl (PCH) mesogenic moieties into MWNT surface through covalent linkage. The LC-functionalized MWNTs (LC-MWNTs) showed good dispersion stability in ethanol as well as good miscibility in a host thermotropic nematic LC (N-LC). A polarizing optical microscope image demonstrated that the LC-MWNTs could be well dispersed in the host N-LC within 5 wt% content of LC-MWNTs without aggregation, which is ascribed to the substantial affinity between the PCH moieties and the host N-LC molecules. It was found that the LC-MWNTs in the host LC matrix could be well aligned parallel to the direction of the applied magnetic field of 5 T. Then the high order parameter of 0.46 for LC-MWNTs was obtained from the measurement of polarized Raman spectroscopy.",

keywords = "Carbon nanotube, Functionalized carbon nanotube, Liquid crystal, Magnetic alignment",

author = "Yoo, {Hye Jin} and Lee, {Sun Young} and You, {Nam Ho} and Lee, {Dong Su} and Hyeonuk Yeo and Choi, {Yong Mun} and Munju Goh and Jinwoo Park and Kazuo Akagi and Cho, {Jae Whan}",

year = "2013",

doi = "10.1016/j.synthmet.2013.07.023",

language = "English",

volume = "181",

pages = "10--17",

journal = "Synthetic Metals",

issn = "0379-6779",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Dispersion and magnetic field-induced alignment of functionalized carbon nanotubes in liquid crystals

AU - Yoo, Hye Jin

AU - Lee, Sun Young

AU - You, Nam Ho

AU - Lee, Dong Su

AU - Yeo, Hyeonuk

AU - Choi, Yong Mun

AU - Goh, Munju

AU - Park, Jinwoo

AU - Akagi, Kazuo

AU - Cho, Jae Whan

PY - 2013

Y1 - 2013

N2 - Liquid crystal (LC)-functionalized multi-walled carbon nanotubes (MWNTs) were synthesized by substituting decyloxy and phenylcyclohexyl (PCH) mesogenic moieties into MWNT surface through covalent linkage. The LC-functionalized MWNTs (LC-MWNTs) showed good dispersion stability in ethanol as well as good miscibility in a host thermotropic nematic LC (N-LC). A polarizing optical microscope image demonstrated that the LC-MWNTs could be well dispersed in the host N-LC within 5 wt% content of LC-MWNTs without aggregation, which is ascribed to the substantial affinity between the PCH moieties and the host N-LC molecules. It was found that the LC-MWNTs in the host LC matrix could be well aligned parallel to the direction of the applied magnetic field of 5 T. Then the high order parameter of 0.46 for LC-MWNTs was obtained from the measurement of polarized Raman spectroscopy.

AB - Liquid crystal (LC)-functionalized multi-walled carbon nanotubes (MWNTs) were synthesized by substituting decyloxy and phenylcyclohexyl (PCH) mesogenic moieties into MWNT surface through covalent linkage. The LC-functionalized MWNTs (LC-MWNTs) showed good dispersion stability in ethanol as well as good miscibility in a host thermotropic nematic LC (N-LC). A polarizing optical microscope image demonstrated that the LC-MWNTs could be well dispersed in the host N-LC within 5 wt% content of LC-MWNTs without aggregation, which is ascribed to the substantial affinity between the PCH moieties and the host N-LC molecules. It was found that the LC-MWNTs in the host LC matrix could be well aligned parallel to the direction of the applied magnetic field of 5 T. Then the high order parameter of 0.46 for LC-MWNTs was obtained from the measurement of polarized Raman spectroscopy.

KW - Carbon nanotube

KW - Functionalized carbon nanotube

KW - Liquid crystal

KW - Magnetic alignment

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U2 - 10.1016/j.synthmet.2013.07.023

DO - 10.1016/j.synthmet.2013.07.023

M3 - Article

AN - SCOPUS:84883777423

SN - 0379-6779

VL - 181

SP - 10

EP - 17

JO - Synthetic Metals

JF - Synthetic Metals

ER -

Dispersion and magnetic field-induced alignment of functionalized carbon nanotubes in liquid crystals

Abstract

Keywords

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