Nanoporous piezo- and ferroelectric thin films.
Nanoporous barium titanate and lead titanate thin films (∼100 nm calculated from ellipsometric data) are prepared starting from sol-gel solutions modified with a commercially available block-copolymer and evaporation-induced self-assembly methodology. The tuning of the thermal treatment followed by in situ ellipsometry allows the decomposition of the organic components and of the structuring agent leading to the formation of porous tetragonal crystalline perovskite structures as observed by XRD, HRTEM, SEM, and ellipsoporosimetry. Both nanoporous barium titanate and lead titanate thin films present local piezoelectric and ferroelectric behavior measured by piezoresponse force microscopy (PFM), being promising platforms for the preparation of the generation of new multifunctional systems.
Departamento de Engenharia Cerâmica e do Vidro, CICECO, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal. pcferreira@ua.pt
Paula
P
Ferreira
Ru Z
RZ
Hou
Aiying
A
Wu
Marc-Georg
MG
Willinger
Paula M
PM
Vilarinho
Jadra
J
Mosa
Christel
C
Laberty-Robert
Cédric
C
Boissière
David
D
Grosso
Clément
C
Sanchez