Unveiling the Role of CNTs in the Phase Formation of One-Dimensional Ferroelectrics
authors Mahajan, A; Reaney, IM; Costa, PMFJ; Kingon, AI; Konya, Z; Kukovecz, A; Vilarinho, PM
nationality International
journal LANGMUIR
keywords MULTIWALL CARBON NANOTUBES; TITANATE THIN-FILMS; SOL-GEL TECHNIQUE; PZT CERAMICS; TEMPERATURE; PRECURSORS; GROWTH; OXIDES
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)O-3 (PZT) by similar to 100 degrees 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 degrees C for MWCNTs/PZT, but for pure PZT, traces of pyrochlore were still present at 650 degrees C, where the PZT phase formed due to homogeneous nucleation. The piezoelectric nature of MWCNTs/PZT synthesized at 500 degrees 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.
publisher AMER CHEMICAL SOC
issn 0743-7463
year published 2015
volume 31
issue 24
beginning page 6713
ending page 6720
digital object identifier (doi) 10.1021/acs.langmuir.5b00866
web of science category Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary
subject category Chemistry; Materials Science
unique article identifier WOS:000356992000014
  ciceco authors
  impact metrics
times cited (wos core): 0
journal impact factor (jcr 2016): 3.833
5 year journal impact factor (jcr 2016): 4.205
category normalized journal impact factor percentile (jcr 2016): 75.189
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