Unveiling the Role of CNTs in the Phase Formation of One-Dimensional Ferroelectrics

Amit Mahajan, Ian M. Reaney, Pedro M.F.J. Costa, Angus I. Kingon, Zoltán Kónya, Ákos Kukovecz, Paula M. Vilarinho

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Carbon nanotubes (CNTs) have the potential to act as templates or bottom electrodes for three-dimensional (3D) capacitor arrays, which utilize one-dimensional (1D) ferroelectric nanostructures to increase the memory size and density. However, growing a ferroelectric on the surface of CNTs is nontrivial. Here, we demonstrate that multiwalled (MW) CNTs decrease the time and temperature for the formation of lead zirconium titanate Pb(Zr1-xTix)O3 (PZT) by ∼100 °C commensurate with a decrease in activation energy from 68 ± 15 to 27 ± 2 kJ/mol. As a consequence, monophasic PZT was obtained at 575°C for MWCNTs/PZT, but for pure PZT, traces of pyrochlore were still present at 650°C, where the PZT phase formed due to homogeneous nucleation. The piezoelectric nature of MWCNTs/PZT synthesized at 500°C for 1 h was proven. Although further work is required to prove the concept of 3D capacitor arrays, our result suggests that it is feasible to utilize MWCNTs as templates/electrodes for the formation of 1D PZT nanoferroelectrics.

Original languageEnglish
Pages (from-to)6713-6720
Number of pages8
JournalLangmuir
Volume31
Issue number24
DOIs
Publication statusPublished - Jun 23 2015

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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    Mahajan, A., Reaney, I. M., Costa, P. M. F. J., Kingon, A. I., Kónya, Z., Kukovecz, Á., & Vilarinho, P. M. (2015). Unveiling the Role of CNTs in the Phase Formation of One-Dimensional Ferroelectrics. Langmuir, 31(24), 6713-6720. https://doi.org/10.1021/acs.langmuir.5b00866