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http://hdl.handle.net/10773/20706
Título: | Unveiling the Role of CNTs in the Phase Formation of One-Dimensional Ferroelectrics |
Autor: | Mahajan, Amit Reaney, Ian M. Costa, Pedro M. F. J. Kingon, Angus I. Konya, Zoltan Kukovecz, Akos Vilarinho, Paula M. |
Palavras-chave: | MULTIWALL CARBON NANOTUBES TITANATE THIN-FILMS SOL-GEL TECHNIQUE PZT CERAMICS TEMPERATURE PRECURSORS GROWTH OXIDES |
Data: | 2015 |
Editora: | AMER CHEMICAL SOC |
Resumo: | 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. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/20706 |
DOI: | 10.1021/acs.langmuir.5b00866 |
ISSN: | 0743-7463 |
Versão do Editor: | 10.1021/acs.langmuir.5b00866 |
Aparece nas coleções: | CICECO - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Unveiling the Role of CNTs in the Phase Formation of One-Dimensional Ferroelectrics_10.1021acs.langmuir.5b00866.pdf | 4.62 MB | Adobe PDF |
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