TY  - JOUR
AU  - Buscaglia, M.T.
AU  - Buscaglia, V.
AU  - Viviani, M.
AU  - Dondero, G.
AU  - Röhrig, S.
AU  - Rüdiger, A.
AU  - Nanni, P.
TI  - Ferroelectric hollow particles obtained by solid-state reaction
JO  - Nanotechnology
VL  - 19
SN  - 0957-4484
CY  - Bristol
PB  - IOP Publ.
M1  - PreJuSER-61844
SP  - 225602
PY  - 2008
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:21825762
UR  - <Go to ISI:>//WOS:000255662500010
DO  - DOI:10.1088/0957-4484/19/22/225602
UR  - https://juser.fz-juelich.de/record/61844
ER  -