H
Helinando P. de Oliveira
Researcher at Universidade Federal do Vale do São Francisco
Publications - 107
Citations - 1767
Helinando P. de Oliveira is an academic researcher from Universidade Federal do Vale do São Francisco. The author has contributed to research in topics: Polypyrrole & Supercapacitor. The author has an hindex of 18, co-authored 105 publications receiving 1137 citations. Previous affiliations of Helinando P. de Oliveira include Massachusetts Institute of Technology & Universidade Federal Rural de Pernambuco.
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Journal ArticleDOI
Supercapacitors from Free-Standing Polypyrrole/Graphene Nanocomposites
TL;DR: In this paper, the relative concentrations of carboxylate functionalized graphene in the polypyrrole matrix were optimized to maximize the composition's capacitance to 277.8 F/g.
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Multifunctional Wearable Electronic Textiles Using Cotton Fibers with Polypyrrole and Carbon Nanotubes.
Ravi Moreno Araújo Pinheiro Lima,Jose J. Alcaraz-Espinoza,Fernando A. G. da Silva,Helinando P. de Oliveira +3 more
TL;DR: Doped polypyrrole/CNT composite provides textiles that reaches temperature on order of 70 °C with field of 5 V/cm, superior electrochemical performance applied as electrodes of supercapacitor prototypes, reaching capacitance in order of 30 F g-1 and strong bactericidal activity against Staphylococcus aureus.
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Carbon nanotube/ polypyrrole nanofibers core-shell composites decorated with titanium dioxide nanoparticles for supercapacitor electrodes
TL;DR: In this article, a simple and low cost composite based on incorporation of titanium dioxide/single walled carbon nanotube complex during polymerization of hollow nanotubes of polypyrrole was explored.
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Antibacterial behavior of polypyrrole: The influence of morphology and additives incorporation
A G Fernando da Silva Jr,Jefferson C. Queiroz,Ericleiton R. Macedo,António Fernandes,Naiana Braga Freire,Mateus Matiuzzi da Costa,Helinando P. de Oliveira +6 more
TL;DR: The influence of different preparation procedures of PPy on action of resulting antibacterial composite against Escherichia coli, Staphylococcus aureus and Klebsiella pneumoniae is summarized.
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UV random laser emission from flexible ZnO-Ag-enriched electrospun cellulose acetate fiber matrix.
Manoel L. da Silva-Neto,Mário César Albuquerque de Oliveira,Christian T. Dominguez,Raquel E. M. Lins,Nikifor Rakov,Cid B. de Araújo,Leonardo de S. Menezes,Helinando P. de Oliveira,Anderson S. L. Gomes,Anderson S. L. Gomes +9 more
TL;DR: The results suggest that the addition of silver nanoprisms to the ZnO- enriched fiber matrix allows large improvement of the RL performance due to the plasmon resonance of the silver nanoprisesms, with ~80% reduction in threshold energy.