Now showing items 1-10 of 489
Plasma-polymerized acetylene nanofilms modified by nitrogen ion implantation
Thin films were prepared by plasma enhanced chemical vapour deposition (PECVD) from a mixture of acetylene and argon, and post deposition-treated by plasma immersion ion implantation (PIII). The effect of PIII on the ...
Influência da composição do meio na sorção de íons metálicos.
(In: ENCONTRO NACIONAL DE QUÍMICA ANALÍTICA, 13.; CONGRESSO ÍBERO - AMERICANO DE QUÍMICA ANALÍTICA, 2005, Niterói, RJ. Anais... Niterói: BENQ, 2005., 2005)
The improvement of thin polymer film properties through plasma immersion ion implantation and deposition technique
Thin polymer films were deposited from acetylene and argon mixtures by plasma immersion ion implantation and deposition. The effect of the pulse frequency, v, on molecular structure, optical gap, contact angle and hardness ...
Study of Er3+ fluorescence on tellurite glasses containing Ag nanoparticles
Optical characteristics of tellurite glasses containing silver nanoparticles (NPs) and the influence on the emission spectrum of Er 3+ ions were studied. The transitions 4f ↔ 4f from erbium ions, mainly the 4I13/2 → 4I15/2 ...
Development of an amperometric sensor for potassium ions
(Insticc-inst Syst Technologies Information Control & Communication, 2008-01-01)
Hollandite-type manganese oxides are nanofibrous crystals with sub-nanometer open tunnels that provide a unique property for sensing applications. Sensor based on hollandite-type manganese oxide was investigated for ...
Synthesis, characterization and thermal behaviour of solid-state compounds of 4-methoxybenzoate with some bivalent transition metal ions
Solid-state M-4-MeO-Bz compounds, where M stands for bivalent Mn, Co, Ni, Cu and Zn and 4-MeO-Bz is 4-methoxybenzoate, have been synthesized. Simultaneous thermogravimetry-differential thermal analysis (TG-DTA), differential ...
Evaluation of setting time, ions release, sealing ability and adhesion of a novel experimental endodontic cement
The aim of this work was to evaluate the setting time, adhesion, sealing ability, and ion release of a novel endodontic sealer (CEOE) and of the commercial Sealer 26® cement. The setting time was determined in accordance ...
Segregação e mudança de cor em dióxido de estanho nanocristalino com a adição simultãnea de íons (Cr,Ca)
(Associação Brasileira de CerâmicaBento Gonçalves, RS, 2014-05-18)
A cor violeta intensa e a alta atividade catalisadora de nanopartículas de SnO2 dopados com Cr tem motivado vários autores a compreender a formação da solução sólida bem como o estado de oxidação dos íons de cromo após a ...
Ion bean etching on ti-30ta alloy for biomedical application
Titanium and titanium alloys are currently being used for clinical biomedical applications due to their high strength, corrosion resistance and elastic modulus. However, these materials have recently been shown to exhibit ...