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

Towards a comprehensive characterization of spatio-temporal dependence of light-induced electromagnetic forces in dielectric liquids by Astrath, N. G. C., Bergmann, E. V., Anghinoni, B., Flizikowski, G. A. S., Novatski, A., Jacinto, C., Požar, T., Kalin, M., Malacarne, L. C., Baesso, M. L.

“…The interaction of localized light with matter generates optical electrostriction within dielectric fluids, leading to a discernible change in the refractive…”
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Investigation of the Photobleaching Process of Eosin Y in Aqueous Solution by Thermal Lens Spectroscopy by Herculano, L. S, Malacarne, L. C, Zanuto, V. S, Lukasievicz, G. V. B, Capeloto, O. A, Astrath, N. G. C

“…Eosin Y is known to be a powerful probe of biological molecules and an efficient photosensitizing agent for the production of singlet molecular oxygen. Under…”
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Unveiling bulk and surface radiation forces in a dielectric liquid by Astrath, N. G. C., Flizikowski, G. A. S., Anghinoni, B., Malacarne, L. C., Baesso, M. L., Požar, T., Partanen, M., Brevik, I., Razansky, D., Bialkowski, S. E.

“…Precise control over light-matter interactions is critical for many optical manipulation and material characterization methodologies, further playing a…”
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Laser induced thermoelastic surface displacement in solids detected simultaneously by photothermal mirror and interferometry by Flizikowski, G A S, Capeloto, O A, Camargo, V G, Anghinoni, B, Baesso, M L, Malacarne, L C, Belançon, M P, Požar, T, Astrath, N G C

“…We propose a combined pump-probe optical method to investigate heat diffusion properties of solids. We demonstrate single-shot simultaneous laser-induced…”
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Role of Photophysics Processes in Thermal Lens Spectroscopy of Fluids: A Theoretical Study by Malacarne, L. C, Savi, E. L, Baesso, M. L, Lenzi, E. K, Astrath, N. G. C

“…Photophysics processes are ubiquitous in nature and difficult to be quantitatively characterized by conventional spectroscopy. Alternatively, pump–probe…”
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Laser-Induced Chemical Reaction Characterization in Photosensitive Aqueous Solutions by Herculano, L. S, Astrath, N. G. C, Malacarne, L. C, Rohling, J. H, Tanimoto, S. T, Baesso, M. L

“…A dual-wavelength on/off-excitation thermal lens technique was used to identify and quantify a laser-induced chemical reaction in ionic aqueous solutions of…”
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Top-hat cw laser induced thermal mirror: a complete model for material characterization by Astrath, N. G. C., Astrath, F. B. G., Shen, J., Zhou, J., Gu, C. E., Malacarne, L. C., Pedreira, P. R. B., Bento, A. C., Baesso, M. L.

“…A complete theoretical model is presented for the thermal mirror technique under top-hat laser excitation. Considering the attenuation of the top-hat…”
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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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A new approach to the textural interpretation of magnetically aligned nematic and cholesteric lyotropic mesophases by using plate-λ accessory by Lüders, D. D., Akpinar, E., Pereira, M. L. G., Astrath, N. G. C.

“…Lyotropic liquid crystals are substances formed by anisotropic micelles. Their unit structure change with the concentration and temperature and, as a…”
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Photoacoustic spectroscopy to determine the optical properties of thin film 4H-SiC by Astrath, N.G.C., Bento, A.C., Baesso, M.L., Ferreira da Silva, A., Persson, C.

“…The optical transitions in a range of 1.5–5.2 eV of n-type 4H-SiC have been investigated experimentally by photoacoustic spectroscopy and theoretically by a…”
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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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Soret effect and photochemical reaction in liquids with laser-induced local heating by Malacarne, L C, Astrath, N G C, Medina, A N, Herculano, L S, Baesso, M L, Pedreira, P R B, Shen, J, Wen, Q, Michaelian, K H, Fairbridge, C

“…We report a theoretical model and experimental results for laser-induced local heating in liquids, and propose a method to detect and quantify the…”
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Surface deformation effects induced by radiation pressure and electrostriction forces in dielectric solids by Astrath, N. G. C., Lukasievicz, G. V. B., Malacarne, L. C., Bialkowski, S. E.

“…The surface displacement produced by radiation pressure and electrostriction forces is investigated considering the commonly accepted theories proposed by…”
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Semiclassical approximation for the specific heat of non-crystalline solids at intermediate temperatures by Astrath, N. G. C., Bento, A. C., Baesso, M. L., Lenzi, E. K., Evangelista, L. R.

“…The origin of the broad maximum in the specific heat (c P ) of glassy systems in the c P /T 3 representation, in correspondence with the boson peak, has been…”
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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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Pump-power-controlled luminescence switching in Yb3+∕Tm3+ codoped water-free low silica calcium aluminosilicate glasses by Jacinto, C., Vermelho, M. V. D., Gouveia, E. A., de Araujo, M. T., Udo, P. T., Astrath, N. G. C., Baesso, M. L.

“…Intense infrared-to-visible upconversion emissions in Tm3+∕Yb3+ codoped water-free low silica calcium aluminosilicate glasses have been obtained under…”
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Resonant excited state absorption and relaxation mechanisms in Tb3+-doped calcium aluminosilicate glasses: an investigation by thermal mirror spectroscopy by Bianchi, G S, Zanuto, V S, Astrath, F B G, Malacarne, L C, Terra, I A A, Catunda, T, Nunes, L A O, Jacinto, C, Andrade, L H C, Lima, S M, Baesso, M L, Astrath, N G C

“…Resonant excited state absorption (ESA) and relaxation processes in Tb(3+)-doped aluminosilicate glasses are quantitatively evaluated. A model describing the…”
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Phonon-roton-like elementary excitations and low-temperature behaviour of non-crystalline solids by Astrath, N. G. C., Baesso, M. L., Bento, A. C., Colucci, C. C., Medina, A. N., Evangelista, L. R.

“…The low-temperature behaviour of the specific heat of a glassy sample is explained in analogy to what is done in the physics of superfluid helium. The…”
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Nd3+ doped CAS glasses: A thermo-optical and spectroscopic investigation by Steimacher, A., Barboza, M.J., Pedrochi, F., Astrath, N.G.C., Rohling, J.H., Baesso, M.L., Medina, A.N.

“…•Two series of CAS glasses, doped up to 5wt.% Nd2O3, were prepared and characterized.•We investigate thermo-optical and spectroscopic properties x temperature…”
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Energy-level and optical properties of nitrogen doped TiO2: An experimental and theoretical study by González-Borrero, P. P., Bernabé, H. S., Astrath, N. G. C., Bento, A. C., Baesso, M. L., Castro Meira, M. V., de Almeida, J. S., Ferreira da Silva, A.

“…Photoacoustic spectroscopy was used to study nitrogen-doped titanium dioxide film. The energy positions of defect and impurity centre levels are reported. The…”
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