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Journal of Applied Physics / Volume 108 / Issue 4 / SPECIAL TOPIC: INVITED PAPERS FROM THE INTERNATIONAL SYMPOSIUM ON PIEZORESPONSE FORCE MICROSCOPY AND NANOSCALE PHENOMENA IN POLAR MATERIALS, AVEIRO, PORTUGAL, 2009

J. Appl. Phys. 108, 042011 (2010); http://dx.doi.org/10.1063/1.3474966 (4 pages)

Piezoresponse force microscopy studies of the triglycine sulfate-based nanofibers

D. V. Isakov1, E. de Matos Gomes1, B. G. Almeida1, I. K. Bdikin2, A. M. Martins3, and A. L. Kholkin4

1Center of Physics, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
2Centre for Mechanical Technology and Automation, University of Aveiro, 3810-193 Aveiro, Portugal
3Department of Polymer Engineering, 3B’s Research Group—Biomaterials, Biodegradables and Biomimetics, University of Minho, AvePark, Zona Industrial da Gandra, S.Cláudio do Barco, 4806-909 Caldas das Taipas, Guimarães, Portugal
4Department of Ceramics and Glass Engineering & Center for Research in Ceramics and Composite Materials (CICECO), University of Aveiro, 3810-193 Aveiro, Portugal

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(Received 3 March 2010; accepted 1 June 2010; published online 31 August 2010)

Local ferroelectric and piezoelectric properties of triglycine sulfate (TGS) nanocrystals embedded into poly(ethylene) oxide (PEO) electrospun fibers were examined by piezoresponse force microscopy (PFM). Piezoresponse contrast was found to be strongly dependent on the position being much stronger at the fiber periphery. A model of the distribution of TGS crystals inside the core-shell PEO-TGS fiber structure was proposed. TGS nanocrystals were unevenly distributed along the fiber axis and tend to grow near the surface of the fiber. The volume fraction distribution of the TGS crystals extracted from PFM measurements is in a good agreement with the data obtained from the dielectric constant measurements.

© 2010 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL
  3. RESULTS AND DISCUSSION
  4. CONCLUSIONS

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KEYWORDS and PACS

Keywords

ferroelectric materials, nanofabrication, nanofibres, organic compounds, permittivity, piezoelectric materials

PACS

  • 77.80.-e

    Ferroelectricity and antiferroelectricity

  • 61.46.Df

    Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots)

  • 77.22.Ch

    Permittivity (dielectric function)

  • 77.65.-j

    Piezoelectricity and electromechanical effects

  • 81.16.-c

    Methods of micro- and nanofabrication and processing

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3474966

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (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.
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