resumo
The piezoelectric and pyroelectric properties of PVDF mainly depend on its beta-phase. This work reports the study by scanning force microscopy in a piezoresponse mode of the variations in the topological morphology and piezoelectric surface response of beta-PVDF prepared by the main preparation methods of this phase. Clear differences in the poled region distribution and size, as well as in the local piezoactivity, have been identified. The piezoelectric activity at a mesoscale reflects the semicrystalline phase of the polymer.
palavras-chave
FILMS
categoria
Materials Science; Physics
autores
Nunes, JS; Wu, A; Gomes, J; Sencadas, V; Vilarinho, PM; Lanceros-Mendez, S
nossos autores
Paula Maria Lousada Silveirinha Vilarinho
Vice-DiretorProjectos
Processing and characterization of electroactive polymers and composites based on PVDF for microelectronic, sensor and actuator applications (POCI/CTM/59425/2004)
Multiferroic, magnetoelectric and metallic micro and nanocomposites base don electroactive polymers (PTDC/CTM/69316/2006)
agradecimentos
The authors thank the Portuguese Foundation for Science and Technology (FCT-Grant POCI/CTM/59425/2004, PTDC/CTM/69316/2006 and INL project 156: SIMBIO) for financial support. V. Sencadas also thanks the FCT for the Ph.D. Grant (SFRH/BD/16543/2004).