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2005 Fiscal Year Final Research Report Summary

Control of spatio temporal mode-switching at a membrane or an interface under nonequilibrium condition

Research Project

Project/Area Number 16550124
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Functional materials chemistry
Research InstitutionNara University of Education

Principal Investigator

NAKATA Satoshi  Nara University of Education, Associate professor, 教育学部, 助教授 (50217741)

Co-Investigator(Kenkyū-buntansha) MATSUYAMA Toyoki  Nara University of Education, Professor, 教育学部, 教授 (70202330)
NAGAYAMA Masaharu  Kanazawa University, Associate Professor, 理学部, 助教授 (20314289)
Project Period (FY) 2004 – 2005
Keywordsnonlinear / nonequilibrium / self-motion / interface / surface / driving force / mode switching / synchronization
Research Abstract

As a simple example of an autonomous motor, the self-motion of a camphor boat on water with changes in chemical stimuli was investigated. For example, the nature of the self-motion of a camphor boat changed characteristically with the addition of ester vapor (methyl n-butyrate) to a circular water chamber. Thus, continuous motion changed to oscillatory motion and its period increased depending on the distance between an ester droplet and the chamber, L. The surface tension in the water chamber was measured to clarify how the velocity of the self-motion changed with L. The nature of the self-motion is discussed in relation to the surface tension as the driving force. We believe that the present results may be useful for realizing artificial chemotaxis systems under nonlinear and isothermal conditions.
As for another system, the propagation of chemical waves in the photosensitive Belousov-Zhabotinsky (BZ) reaction was investigated using an excitable field in the shape of a circular ring or figure "8" which was drawn by computer software and then projected on a film soaked with BZ solution using a liquid-crystal projector. For a chemical wave in a circular reaction field, the shape of the chemical wave was investigated depending on the ratio of the inner and outer radii. When two chemical waves were generated on a field shaped like a figure "8" (one chemical wave in each circle) as the initial condition, the location of the collision of the waves either was constant or alternated depending on the degree of overlap of the two circular rings. These experimental results were analyzed based on a geometrical discussion and theoretically reproduced based on a reaction-diffusion equation using a modified Oregonator model. The photosensitive BZ reaction may be useful for creating spatio-temporal patterns depending on the geometric arrangement of excitable fields.

  • Research Products

    (17 results)

All 2006 2005 2004

All Journal Article (16 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Characteristic motion of a camphanic acid disk on water depending on the concentration of Triton X-1002006

    • Author(s)
      S.Nakata, J.Kirisaka
    • Journal Title

      Journal of Physical Chemistry B 110(印刷中)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Distinction of gases with a semiconductor sensor depending on the scanning profile of a cyclic temperature2006

    • Author(s)
      S.Nakata, Y.Doi, H.Kitahara
    • Journal Title

      Analyst 131

      Pages: 148-154

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Interactive Propagation of Photosensitive Chemical Waves on Two Circular Routes.2006

    • Author(s)
      S.Nakata, S.Morishima, H.Kitahara
    • Journal Title

      Journal of Physical Chemistry A (JP056881J) (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Distinction of gases with a semiconductor sensor under a cyclic temperature modulation with second-harmonic heating.2006

    • Author(s)
      S.Nakata, H.Okunishi, Y.Nakashima
    • Journal Title

      Sensors and Actuators B (SNB-D-05-00635R2) (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Characteristic motion of a camphanic acid disk on water depending on the concentration of Triton X-100.2006

    • Author(s)
      S.Nakata, J.Kirisaka
    • Journal Title

      Journal of Physical Chemistry B (JP056236C) (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Distinction of gases with a semiconductor sensor depending on the scanning profile of a cyclic temperature.2006

    • Author(s)
      S.Nakata, H.Okunishi, Y.Nakashima
    • Journal Title

      Analyst 131

      Pages: 148-154

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Synchronized sailing of two camphor boats in polygonal chambers2005

    • Author(s)
      S.Nakata, Y.Doi, H.Kitahata
    • Journal Title

      Journal of Physical Chemistry B 109

      Pages: 1798-1802

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Characteristic self-motion of a camphor boat sensitive to ester vapor2005

    • Author(s)
      S.Nakata, K.Matsuo
    • Journal Title

      Langmuir 21

      Pages: 982-984

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Self-motion of soap at an oil-water interface2005

    • Author(s)
      S.Nakata, S.Hiromatsu
    • Journal Title

      Chemical Physics Letters 405

      Pages: 45-48

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Propagation of photosensitive chemical waves on the circular routes2005

    • Author(s)
      K.Kitahara, A.Yamada, S.Nakata, T.Ichino
    • Journal Title

      Journal of Physical Chemistry A 109

      Pages: 4973-4978

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Synchronized sailing of two camphor boats in polygonal chambers.2005

    • Author(s)
      S.Nakata, Y.Doi, H.Kitahata
    • Journal Title

      Journal of Physical Chemistry B 109

      Pages: 1798-1802

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Characteristic self-motion of a camphor boat sensitive to ester vapor.2005

    • Author(s)
      S.Nakata, K.Matsuo
    • Journal Title

      Langmuir 21

      Pages: 982-984

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Self-motion of a camphor boats in polygonal chambers.2005

    • Author(s)
      S.Nakata, S.Hiromatsu
    • Journal Title

      Chemical Physics Letters 405

      Pages: 45-48

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Oscillation in a SnO2 semiconductor gas sensor exposed to benzyl alcohol.2005

    • Author(s)
      S.Nakata, H.Okunishi, Y.Nakashima, T.Mori
    • Journal Title

      Chemistry Letters 34

      Pages: 186-187

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Characterisitc responses of a semiconductor gas sensor depending on the frequency of a periodic temperature change.2005

    • Author(s)
      S.Nakata, H.Okunishi
    • Journal Title

      Applied Surface Science 240

      Pages: 366-374

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Propagation of photosensitive chemical waves on the circular routes.2005

    • Author(s)
      H.Kitahara, A.Yamada, S.Nakata, T.Ichino
    • Journal Title

      Journal of Physical Chemistry A 109

      Pages: 4973-4978

    • Description
      「研究成果報告書概要(欧文)」より
  • [Patent(Industrial Property Rights)] 芳香族アルコールを可動触媒として用いた非線形振動子2004

    • Inventor(s)
      中田聡他
    • Industrial Property Rights Holder
      内山昌幸
    • Industrial Property Number
      特願2004-315177
    • Filing Date
      2004-10-29
    • Description
      「研究成果報告書概要(和文)」より

URL: 

Published: 2007-12-13  

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