Search Results - "Astrath, N.G.C."

Thermal Lens Temperature Scanning technique for evaluation of oxidative stability and time of transesterification during biodiesel synthesis by Constantino, R., Lenzi, G.G., Franco, M.G., Lenzi, E.K., Bento, A.C., Astrath, N.G.C., Malacarne, L.C., Baesso, M.L.

“…In this work, laser-induced Thermal Lens Temperature Scanning technique (TL-TS) is applied to evaluate oxidative stability and time of transesterification…”
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The role of electrostriction in the generation of acoustic waves by optical forces in water by Astrath, N.G.C., Anghinoni, B., Flizikowski, G.A.S., Zanuto, V.S., Malacarne, L.C., Baesso, M.L., Požar, T., Razansky, D.

“…We present semi-analytical solutions describing the spatiotemporal distributions of temperature and pressure inside low-absorbing dielectrics excited by…”
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Boson elementary excitations and the specific heat of non-crystalline solids: A short review by Astrath, N.G.C., Baesso, M.L., Bento, A.C., Evangelista, L.R.

“…A simple theoretical approach to investigate the low-temperature behavior of the specific heat of a non-crystalline solid is proposed. We discuss the…”
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On the formulations of the electromagnetic stress–energy tensor by Anghinoni, B., Flizikowski, G.A.S., Malacarne, L.C., Partanen, M., Bialkowski, S.E., Astrath, N.G.C.

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Reviewing the effect of aggregates in Rhodamine 6G aqueous solution on fluorescence quantum efficiency by Rocha, U., Armas, L.E.G., Silva, W.F., Dousti, M.R., Moura, A.L., Novatski, A., Astrath, N.G.C., Jacinto, C.

“…[Display omitted] •Impact of aggregates in Rhodamine 6G on the thermal and optical properties.•Energy transfers effect on the fluorescence quantum efficiency…”
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The effect of silica content on the luminescence properties of Tb3+-doped calcium aluminosilicate glasses by dos Santos, J.F.M., Astrath, N.G.C., Baesso, M.L., Nunes, L.A.O., Catunda, T.

“…Tb3+ doped materials exhibit strong emission in the green (5D4) and weak emission in the UV-blue (5D3) regions. The blue emission can occur from direct UV…”
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White light source and optical thermometry based on zinc-tellurite glass tri-doped with Tm3+/Er3+/Sm3 by Sales, T.O., Jacinto, C., Silva, W.F., Antunes, R., Dias, D.T., Gonçalves, A., El-Mallawany, R., Astrath, N.G.C., Novatski, A.

“…•Optical thermometry applications of the Tm3+/Er3+/Sm3+ tri-doped TeO2-Li2O-ZnO (TLZ) glasses has been investigated.•The highest value of relative thermal…”
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Upconversion luminescence and hypersensitive transitions of Pr 3 + –doped calcium aluminosilicate glasses by Flizikowski, G.A.S., Zanuto, V.S., Novatski, A., Nunes, L.A.O., Malacarne, L.C., Baesso, M.L., Astrath, N.G.C.

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UV–visible-NIR light generation through frequency upconversion in Tm3+-doped low silica calcium aluminosilicate glasses using multiple excitation around 1.2 µm by Trindade, C.M., Rego-Filho, F.G., Astrath, N.G.C., Jacinto, C., Gouveia-Neto, A.S.

“…Intense ultraviolet upconversion emission was produced in single Tm3+-doped OH--free low silica calcium aluminosilicate glasses. A new excitation route based…”
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Float, borosilicate and tellurites as cover glasses in Si photovoltaics: Optical properties and performances under sunlight by Belançon, M.P., Sandrini, M., Muniz, H.S., Herculano, L.S., Lukasievicz, G.V.B., Savi, E.L., Capeloto, O.A., Malacarne, L.C., Astrath, N.G.C., Baesso, M.L., Schiavon, G.J., Silva Junior, A.A., Marconi, J.D.

“…One of the most significant materials in a solar panel is the glass, which provides transparency, UV protection as well as mechanical and chemical resistance…”
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Thermal and optical properties of lithium-zinc-tellurite glasses by Novatski, A., Somer, A., Gonçalves, A., Piazzetta, R.L.S., Gunha, J.V., Andrade, A.V.C., Lenzi, E.K., Medina, A.N., Astrath, N.G.C., El-Mallawany, R.

“…(100-X-Y)TeO2-XLi2O-YZnO, X = 10, 15 and 20, Y = 0, 5, 10, 15, 20, 25 and 30 mol%, glasses have been prepared by the melt quenching technique. Density and…”
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Luminescence and upconversion processes in Er3+-doped tellurite glasses by Gonçalves, A., Zanuto, V.S., Flizikowski, G.A.S., Medina, A.N., Hegeto, F.L., Somer, A., Gomes Jr, J.L., Gunha, J.V., Cruz, G.K., Jacinto, C., Astrath, N.G.C., Novatski, A.

“…This work presents a spectroscopic investigation of tellurite glasses with the composition 65TeO2-15Li2O-20ZnO doped with different concentrations of Er2O3…”
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Upconversion luminescence and hypersensitive transitions of Pr3+–doped calcium aluminosilicate glasses by Flizikowski, G.A.S., Zanuto, V.S., Novatski, A., Nunes, L.A.O., Malacarne, L.C., Baesso, M.L., Astrath, N.G.C.

“…We present a detailed spectroscopic study of photoluminescence in calcium aluminosilicate glasses doped with different concentrations of Pr3+ (0.2, 0.5, 1.0…”
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Standard and modified Judd-Ofelt theories in Pr3+-doped calcium aluminosilicate glasses: A comparative analysis by Flizikowski, G.A.S., Zanuto, V.S., Nunes, L.A.O., Baesso, M.L., Malacarne, L.C., Astrath, N.G.C.

“…The small energy difference between the fundamental level and the first opposite parity configuration of Pr3+-doped hosts is particularly challenging for the…”
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Soret effect in lyotropic liquid crystal in the isotropic phase revealed by time-resolved thermal lens by Oliveira, G.M., Zanuto, V.S., Flizikowski, G.A.S., Kimura, N.M., Sampaio, A.R., Novatski, A., Baesso, M.L., Malacarne, L.C., Astrath, N.G.C.

“…We demonstrate the Soret effect in a lyotropic liquid crystal at different temperatures across the isotropic phase detected by the time-resolved thermal lens…”
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Luminescence and upconversion processes in Er 3 + -doped tellurite glasses by Gonçalves, A., Zanuto, V.S., Flizikowski, G.A.S., Medina, A.N., Hegeto, F.L., Somer, A., Gomes Jr, J.L., Gunha, J.V., Cruz, G.K., Jacinto, C., Astrath, N.G.C., Novatski, A.

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Pump-induced refractive index changes in Tb3+ doped glasses by Vieira, T.A., dos Santos, J.F.M., Auad, Y.M, Nunes, L.A.O., Astrath, N.G.C, Baesso, M.L., Catunda, T.

“…It now well known in laser materials, that a refractive index change appears when the active ions are pumped from ground to excited state due to the…”
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Investigation of Thermophysical Properties of Thermal Degraded Biodiesels by Regatieri, H. R., Savi, E. L., Lukasievicz, G. V. B., Sehn, E., Herculano, L. S., Astrath, N. G. C., Malacarne, L. C.

“…Biofuels are an alternative to fossil fuels and can be made from many different raw materials. The use of distinct catalyst and production processes,…”
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Direct measurement of photo-induced nanoscale surface displacement in solids using atomic force microscopy by Souza, S.T., Fonseca, E.J.S., Jacinto, C., Astrath, N.G.C., Rodrigues, T.P., Malacarne, L.C.

“…•AFM is employed to determine the time evolution of laser-induced surface deformation.•The results are found to be in excellent agreement compared to those…”
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Investigation into photostability of soybean oils by thermal lens spectroscopy by Savi, E.L., Malacarne, L.C., Baesso, M.L., Pintro, P.T.M., Croge, C., Shen, J., Astrath, N.G.C.

“…[Display omitted] •We propose a time-resolved thermal lens method to analyze photostability of edible oils.•Photoreaction, heat and mass diffusions are…”
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