Project/scholarship details
- Project/scholarship ID
69316
- Reference
PTDC/CTM/69316/2006
- FundRef URI
- Funder
FCT - Fundação para a Ciência e a Tecnologia, I.P.
- Funder's country
Portugal
- Funding program
5876-PPCDTI
- Funding amount
70,000.00 €
- Start date
2009-01-01
- End date
2012-04-30
Documents
Enhancement of the dielectric constant and thermal properties of α-Poly(vinylid...
Lopes, Ana Catarina; Silva, Marco Pinto; Gonçalves, Renato; Pereira, Manuel F. R.; Botelho, Gabriela; Fonseca, A. M.; Lanceros-Méndez, S.Different commercial Y zeolites derivate from faujasite structure with similar total Si/Al ratio, NaY (Si/Al = 2.83), HY (Si/Al = 2.80), and HUSY (Si/Al = 3.00), but different framework Si/Al ratios were used to prepare α-poly(vinylidene fluoride) (α-PVDF)/zeolite nanocomposites. Structural and textural characterization of different Y zeolites was obtained by XRD, FTIR, elemental analysis and nitrogen adsorptio...
Strain dependence electrical resistance and cohesive strength of ITO thin films...
Rebouta, L.; Rubio-Peña, L.; Oliveira, C.; Lanceros-Méndez, S.; Tavares, C. J.; Alves, E.Transparent, conducting, indium tin oxide (ITO) films have been deposited, by pulsed dc magnetron sputtering, on glass and electroactive polymer (poly(vinylidene fluoride)-PVDF) substrates. Samples have been prepared at room temperature by varying the oxygen partial pressure. Electrical resistivity around 8.4 x 10(-4) Omega cm has been obtained for films deposited on glass, while a resistivity of 1.7 x 10(-3) O...
Effect of the carbon nanotube surface characteristics on the conductivity and d...
Carabineiro, S. A. C.; Pereira, M. F. R.; Pereira, J. Nunes; Caparrós Vásquez, Cristina Maria; Sencadas, Vítor João Gomes Silva; Lanceros-Méndez, S.Commercial multi-walled carbon nanotubes (CNT) were functionalized by oxidation with HNO3, in order to introduce oxygen-containing surface groups, and by thermal treatments at different temperatures for their selective removal. The obtained samples were characterized by adsorption of N2 at -196 ºC, temperature programmed desorption and determination of pH at the point of zero charge. CNT/poly(vinylidene fluorid...
Influence of ferrite nanoparticle type and content on the crystallization kinet...
Sencadas, Vítor João Gomes Silva; Martins, P.; Pitães, A.; Benelmekki, M.; Gómez Ribelles, J. L.; Lanceros-Méndez, S.This work reports on the nucleation of the β-phase of poly(vinylidene fluoride), PVDF, by incorporating CoFe2O4 and NiFe2O4 nanoparticles, leading in this way, to the preparation of magnetoelectric composites. The fraction of filler nanoparticles needed to produce the same β- to α-phase ratio in crystallized PVDF is one order of magnitude lower in the Cobalt nanoparticles. The interaction between nanoparticles ...
Optimising piezoelectric and magnetoelectric responses on CoFe2O4/P(VDF-TrFE) n...
Martins, P.; Lasheras, A.; Gutierrez, J.; Barandiaran, J. M.; Orue, I.; Lanceros-Méndez, S.Magnetoelectric nanocomposite films composed of magnetostrictive CoFe2O4 nanoparticles with sizes between 35 and 55 nm embedded in P(VDF-TrFE) have been successfully prepared by a solvent casting method. The ferroelectric, piezoelectric, magnetic and magnetoelectric properties of the nanocomposite and their variation with the wt% of the ferrite filler, thickness of the composite and direction of the applied mag...
Linear anhysteretic direct magnetoelectric effect in Ni0.5Zn0.5Fe2O4/poly(vinyl...
Martins, P.; Moya, X.; Phillips, L. C.; Kar-Narayan, S.; Mathur, N. D.; Lanceros-Méndez, S.Free-standing flexible magnetoelectric 0-3 composite films, comprising Ni0.5Zn0.5Fe2O4 (NZFO) ferrite nanoparticles in a poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] copolymer matrix, have been prepared at low temperatures by solvent casting and melt crystallization. Ferroelectric, piezoelectric, magnetic and direct magnetoelectric properties of the nanocomposites depend strongly on ferrite concent...
Production of electroactive filaments by coextrusion
Nóbrega, J. M.; Ferreira, A.; Costa, Pedro; Carvalho, Helder; Sencadas, Vítor João Gomes Silva; Lanceros-Méndez, S.The development of new products for i-textiles (interactive textiles) or e-textiles (electronic textiles) applications shows a significant growth in the most recent years due to their huge potential. Although much scientific work has been published in the last years, actual practical applications are still limited. This is due, on one hand, to unsatisfactory state of development of the technology and, on the ot...
Tailoring morphology and crystallinity of poly(L-lactide acid) electrospun memb...
Ribeiro, C.; Sencadas, Vítor João Gomes Silva; Costa, Carlos M.; Gómez Ribelles, J. L.; Lanceros-Méndez, S.Biodegradable poly(L-lactide acid) (PLLA) microfibers were prepared by electrospinning by varying applied potential, solution flow rate and collector conditions. Smoothly oriented and random fiber morphologies of PLLA were obtained and characterized by scanning electron microscopy. Optimum fiber orientation was obtained at 1000 rpm in a 20,3 cm diameter collecting drum, while for higher or lower drum rotation s...
Cohesive strength of nanocrystalline ZnO: Ga thin films deposited at room tempe...
Samantilleke, A. P.; Rebouta, L.; Garim, V.; Rubio-Peña, L.; Lanceros-Méndez, S.; Alpuim, P.; Carvalho, S.; Kudrin, A. V.; Danilov, Yu. A.Transparent conducting nanocrystalline ZnO:Ga (GZO) films with electromechanical and electro-optical properties were deposited by dc magnetron sputtering at room temperature on polymers (and glass for comparison). Electrical resistivity of 8.8x10-4 and 2.2x10-3 Ω.cm was obtained for films deposited on glass and polymers respectively. The crack onset strain (COS), the cohesive strength of the coatings, as well a...
Tailoring porous structure of ferroelectric poly(vinylidene fluoride-trifluoroe...
California, A.; Cardoso, V. F.; Costa, Carlos M.; Sencadas, Vítor João Gomes Silva; Botelho, Gabriela; Gómez Ribelles, J. L.; Lanceros-Méndez, S.Ferroelectric macroporous poly(vinylidene fluoride-trifuoroethylene) membranes have been produced by isothermal crystallization from the solution at different temperatures starting from different diluted solutions of the co-polymer in dimethylformamide. In this way pore architecture, consisting in interconnected spherical pores can be obtained. The mechanism and kinetics of solvent evaporation was investigated ...
Report
Embed
<script type="text/javascript">
<!--
document.write('<div id="rcaap-widget"></div>');
document.write('<script type="text/javascript" src="https://www.rcaap.pt/snippet?resource=documents&project=FCT%2F5876-PPCDTI%2F69316&fields=id,titles,creators,issueDate,link,descriptions"></script>');
-->
</script>