Terahertz dichroism of MBBA liquid crystal on rubbed substrate

Jun ichi Nishizawa; Tetsuya Yamada; Tetsuo Sasaki; Tadao Tanabe; Toshimasa Wadayama; Takenori Tanno; Ken Suto

doi:10.1016/j.apsusc.2005.06.031

Terahertz dichroism of MBBA liquid crystal on rubbed substrate

Jun ichi Nishizawa, Tetsuya Yamada, Tetsuo Sasaki, Tadao Tanabe, Toshimasa Wadayama, Takenori Tanno, Ken Suto

ENV - Frontier Science for Advanced Environment

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

22 Citations (Scopus)

Abstract

Terahertz (THz) dichroism of a nematic liquid N-(p-methoxybenzylidene)-p-butylaniline (MBBA) was measured using a GaP Raman THz spectrometer. MBBA on a rubbed plastic substrate generates a band at around 4.0 THz: its liquid crystal phase shows strong dichroism, which well corresponds to that of the IR absorption caused by π(C{single bond}H) of MBBA molecule reported in the literature. Based on inferences drawn from the present THz and the published IR dichroic results, the 4.0 THz band probably stems from lateral intermolecular or intramolecular interactions of MBBA molecules aligned to the rubbing direction. The results clearly demonstrate that THz spectroscopy is powerful for discussing of phase transition and dichroism of liquid crystals.

Original language	English
Pages (from-to)	4226-4229
Number of pages	4
Journal	Applied Surface Science
Volume	252
Issue number	12
DOIs	https://doi.org/10.1016/j.apsusc.2005.06.031
Publication status	Published - 2006 Apr 15

Keywords

Liquid crystal (LC)
MBBA
Terahertz dichroism

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10.1016/j.apsusc.2005.06.031

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title = "Terahertz dichroism of MBBA liquid crystal on rubbed substrate",

abstract = "Terahertz (THz) dichroism of a nematic liquid N-(p-methoxybenzylidene)-p-butylaniline (MBBA) was measured using a GaP Raman THz spectrometer. MBBA on a rubbed plastic substrate generates a band at around 4.0 THz: its liquid crystal phase shows strong dichroism, which well corresponds to that of the IR absorption caused by π(C{single bond}H) of MBBA molecule reported in the literature. Based on inferences drawn from the present THz and the published IR dichroic results, the 4.0 THz band probably stems from lateral intermolecular or intramolecular interactions of MBBA molecules aligned to the rubbing direction. The results clearly demonstrate that THz spectroscopy is powerful for discussing of phase transition and dichroism of liquid crystals.",

keywords = "Liquid crystal (LC), MBBA, Terahertz dichroism",

author = "Nishizawa, {Jun ichi} and Tetsuya Yamada and Tetsuo Sasaki and Tadao Tanabe and Toshimasa Wadayama and Takenori Tanno and Ken Suto",

note = "Funding Information: This study was conducted as part of the Terahertz Optics Project for Medical Applications led by J. Nishizawa, organized by the Ministry of Education, Culture, Sports, Science and Technology of Japan.",

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doi = "10.1016/j.apsusc.2005.06.031",

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AU - Nishizawa, Jun ichi

AU - Yamada, Tetsuya

AU - Sasaki, Tetsuo

AU - Tanabe, Tadao

AU - Wadayama, Toshimasa

AU - Tanno, Takenori

AU - Suto, Ken

N1 - Funding Information: This study was conducted as part of the Terahertz Optics Project for Medical Applications led by J. Nishizawa, organized by the Ministry of Education, Culture, Sports, Science and Technology of Japan.

PY - 2006/4/15

Y1 - 2006/4/15

N2 - Terahertz (THz) dichroism of a nematic liquid N-(p-methoxybenzylidene)-p-butylaniline (MBBA) was measured using a GaP Raman THz spectrometer. MBBA on a rubbed plastic substrate generates a band at around 4.0 THz: its liquid crystal phase shows strong dichroism, which well corresponds to that of the IR absorption caused by π(C{single bond}H) of MBBA molecule reported in the literature. Based on inferences drawn from the present THz and the published IR dichroic results, the 4.0 THz band probably stems from lateral intermolecular or intramolecular interactions of MBBA molecules aligned to the rubbing direction. The results clearly demonstrate that THz spectroscopy is powerful for discussing of phase transition and dichroism of liquid crystals.

AB - Terahertz (THz) dichroism of a nematic liquid N-(p-methoxybenzylidene)-p-butylaniline (MBBA) was measured using a GaP Raman THz spectrometer. MBBA on a rubbed plastic substrate generates a band at around 4.0 THz: its liquid crystal phase shows strong dichroism, which well corresponds to that of the IR absorption caused by π(C{single bond}H) of MBBA molecule reported in the literature. Based on inferences drawn from the present THz and the published IR dichroic results, the 4.0 THz band probably stems from lateral intermolecular or intramolecular interactions of MBBA molecules aligned to the rubbing direction. The results clearly demonstrate that THz spectroscopy is powerful for discussing of phase transition and dichroism of liquid crystals.

KW - Liquid crystal (LC)

KW - MBBA

KW - Terahertz dichroism

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JO - Applied Surface Science

JF - Applied Surface Science

IS - 12

ER -

Terahertz dichroism of MBBA liquid crystal on rubbed substrate

Abstract

Keywords

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