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Applied Physics Letters / Volume 96 / Issue 18 / NANOSCALE SCIENCE AND DESIGN

Appl. Phys. Lett. 96, 183113 (2010); http://dx.doi.org/10.1063/1.3425894 (3 pages)

Observation of ferroelectric response in conjugated polymer nanotubes

D. Majumdar and S. K. Saha

Department of Materials Science, India Association for the Cultivation of Science, Jadavpur, Kolkata 700032, West Bengal, India

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(Received 5 November 2009; accepted 15 April 2010; published online 7 May 2010)

Long range charge delocalization usually inhibits ferroelectric response in conjugated polymers. We observe remarkable ferroelectric response (remnant polarization 2.8 μC cm−2) in polyaniline (PANI) nanotubes synthesized by oxidative polymerization technique in methanol medium using anodic alumina (AAO) template. Ferroelectricity in PANI nanotubes arises due to spontaneous polarization caused by hydrogen bonds, created due to charge transfer between methanol molecule and aligned polymer chain. Due to directional growth along the AAO nanochannel, PANI chains are well-aligned and all these dipoles associated with hydrogen bonds are arranged in regular order—exhibiting exceptional ferroelectric response. However, such effect is absent in bulk PANI.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

charge exchange, conducting polymers, dielectric polarisation, ferroelectric materials, ferroelectricity, hydrogen bonds, nanofabrication, nanotubes, polymerisation

PACS

  • 77.80.-e

    Ferroelectricity and antiferroelectricity

  • 77.84.Jd

    Polymers; organic compounds

  • 77.22.Ej

    Polarization and depolarization

  • 82.35.Cd

    Conducting polymers

  • 81.16.-c

    Methods of micro- and nanofabrication and processing

  • 82.30.Rs

    Hydrogen bonding, hydrophilic effects

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3425894

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    J. L. Duvail, Y. Long, S. Cuenot, Z. Chen, and C. Gu, Appl. Phys. Lett. 90, 102114 (2007)APPLAB000090000010102114000001.

    Y. Long, K. Huang, J. Yuan, D. Han, L. Niu, Z. Chen, C. Gu, A. Jin, and J. L. Duvail, Appl. Phys. Lett. 88, 162113 (2006)APPLAB000088000016162113000001.

    S. K. Saha, Appl. Phys. Lett. 81, 3645 (2002)APPLAB000081000019003645000001.

    S. K. Saha and D. Chakravorty, Appl. Phys. Lett. 89, 043117 (2006)APPLAB000089000004043117000001.

    B. T. Matthias, C. E. Miller, and J. P. Remeika, Phys. Rev. 104, 849 (1956).


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