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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@article{723ef3d0432846b09ef7cf1cb8727625,

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.",

}

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

UR - https://www.scopus.com/pages/publications/84883777423

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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