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Buscaglia MT, Buscaglia V, Viviani M, et al. Ferroelectric hollow particles obtained by solid-state reaction. Nanotechnology. 2008;19(22):225602doi: 10.1088/0957-4484/19/22/225602.
Buscaglia, M. T., Buscaglia, V., Viviani, M., Dondero, G., Röhrig, S., Rüdiger, A., & Nanni, P. (2008). Ferroelectric hollow particles obtained by solid-state reaction. Nanotechnology, 19(22), 225602. https://doi.org/10.1088/0957-4484/19/22/225602
Buscaglia, Maria Teresa, et al. "Ferroelectric hollow particles obtained by solid-state reaction." Nanotechnology vol. 19,22 (2008): 225602. doi: https://doi.org/10.1088/0957-4484/19/22/225602
Buscaglia MT, Buscaglia V, Viviani M, Dondero G, Röhrig S, Rüdiger A, Nanni P. Ferroelectric hollow particles obtained by solid-state reaction. Nanotechnology. 2008 Jun 04;19(22):225602. doi: 10.1088/0957-4484/19/22/225602. Epub 2008 Apr 25. PMID: 21825762.
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Nanotechnology. 2008 Jun 04;19(22):225602. doi: 10.1088/0957-4484/19/22/225602. Epub 2008 Apr 25.

Ferroelectric hollow particles obtained by solid-state reaction.

Nanotechnology

Maria Teresa Buscaglia, Vincenzo Buscaglia, Massimo Viviani, Giovanni Dondero, Serge Röhrig, Andreas Rüdiger, Paolo Nanni

Affiliations

  1. Institute of Energetics and Interphases, National Research Council, Via De Marini 6, I-16149 Genoa, Italy.

PMID: 21825762 DOI: 10.1088/0957-4484/19/22/225602

Abstract

Hollow particles of barium titanate were obtained by a two-step process combining colloidal chemistry and solid-state reaction. BaCO(3) crystals (size ≈1 µm) suspended in a peroxy-Ti(IV) aqueous solution were coated with an amorphous TiO(2) shell using a precipitation process. Calcination of the BaCO(3)@TiO(2) core-shell particles at 700 °C resulted in the formation of BaTiO(3) hollow particles (shell thickness of ≈70 nm) which retain the morphology of the BaCO(3) crystals. Formation of the cavity occurs because out-diffusion of the core phase is much faster than in-diffusion of the shell material. X-ray diffraction (XRD) and Raman spectroscopy indicate that the hollow particles possess a tetragonal ferroelectric structure with axial ratio c/a = 1.005. Piezoresponse force microscopy has shown strong piezoactivity and 180° ferroelectric domains. The process described provides a general route to fabricate hollow ferroelectric structures of several compounds.

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