Presentation 1997/7/4
Dielectric Relaxation Phenomena of Liquid Crystal Monolayer at the Air-Water Interface
Yutaka MAJIMA, Yoko SATO, Mitsumasa IWAMOTO,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) Dielectric relaxation phenomena of 4-cyano-4'-5-alkyl-biphenyl (5CB) monolayer at the air-water interface have been investigated. Maxwell displacement current (MDC;I)-area per molecule (:A) isotherms and surface pressure (:π)-A isotherms were measured at several monolayer compression ratios. Dipole moment (:m_Z) -A isotherm and dm_Z/dt-A isotherm were evaluated from I-A isotherm. It was found that in the range (range 2) where the surface pressure is almost zero, m_Z tends to increase at wide A as the compression ratio becomes small, whereas m_Z-A isotherm coincides each other for various compression ratios in the range where the surface pressure increases by monolayer compression. These results indicate that the compression process of 5CB monolayer in the range 2 is a non-equilibrium process. Relaxation time (:τ)-A isotherm and dipole moment at equilibrium state (:m_)-A isotherm were evaluated for the first time by using the equation d(mZ- m_)/dt=-(mz-m_)/τ, which represents the dielectric relaxation process.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) dielectric relaxation / Maxwell displacement current / relaxation time / monolayer at the air-water interface / Liquid crystal
Paper # CPM97-39
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Conference Information
Committee CPM
Conference Date 1997/7/4(1days)
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Registration To Component Parts and Materials (CPM)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Dielectric Relaxation Phenomena of Liquid Crystal Monolayer at the Air-Water Interface
Sub Title (in English)
Keyword(1) dielectric relaxation
Keyword(2) Maxwell displacement current
Keyword(3) relaxation time
Keyword(4) monolayer at the air-water interface
Keyword(5) Liquid crystal
1st Author's Name Yutaka MAJIMA
1st Author's Affiliation Department of Physical Electronics, Tokyo Institute of Technology()
2nd Author's Name Yoko SATO
2nd Author's Affiliation Department of Physical Electronics, Tokyo Institute of Technology
3rd Author's Name Mitsumasa IWAMOTO
3rd Author's Affiliation Department of Physical Electronics, Tokyo Institute of Technology
Date 1997/7/4
Paper # CPM97-39
Volume (vol) vol.97
Number (no) 150
Page pp.pp.-
#Pages 6
Date of Issue