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So far nelson has created 472 blog entries.

Mechanism of electrically induced photonic band gap broadening in polymer stabilized cholesteric liquid crystals with negative dielectric anisotropies

Hossein Nemati, Shiyi Liu, Rafael S. Zola, Vincent P. Tondiglia, Kyung Min Lee, Timothy White, Timothy Bunningb e Deng-Ke Yan

Soft Matter – Volume: 11; Issue: 6; Pages: 1208-1213; DOI: 10.1039/C4SM02283A

We experimentally observed that the photonic band gap (reflection band) of polymer stabilized cholesteric liquid crystals with negative dielectric anisotropies can be greatly broadened under DC electric […]

Mechanisms of optical losses in the 5D4 and 5D3 levels in Tb3+ doped low silica calcium aluminosilicate glasses

J. F. M. dos Santos, Idelma A. A. Terra, Nelson G. C. Astrath, Francine B. Guimarães, Mauro L. Baesso, Luiz A. Oliveira Nunes e Tomaz Catunda

Journal of Applied Physics – Volume: 117; Number: 5; Page: 053102; DOI: 10.1063/1.4906781

Trivalent Tb-doped materials exhibit strong emission in the green and weak emission in the UV-blue levels. Usually, this behavior […]

Modeling Heavy Metal Sorption Kinetics Using Fractional Calculus

Vandressa C. Friesen, Delano P. Leitoles, Giane Gonçalves, Ervin K. Lenzi e Marcelo K. Lenzi

Mathematical Problems in Engineering – Volume: 2015; Number Article: 549562; Pages: 1-8; DOI: 10.1155/2015/549562

Heavy metals are commonly regarded as environmentally aggressive and hazardous to human health. Among the different metals, lead plays an important economic role due to its large use in the […]

Modeling population and thermal lenses in the presence of Auger Upconversion for Nd3+ doped materials

Erving C. Ximendes, Wagner F. Silva, Marcus V. D. Vermelho, Nelson G. C. Astrath, Luis C. Malacarne, Mauro L. Baesso, Tomaz Catunda e Carlos Jacinto da Silva

Optics Express  – Volume: 23; Issue: 12; Pages: 15983-15991; DOI: 10.1364/OE.23.015983

We present a theoretical model to thermal (TL) and population (PL) lenses effects in the presence of Auger upconversion […]

Nectandra falcifolia: potential phytopharmaceutical for skin damage protection designed by statistical approach and characterized by photoacoustic spectroscopy

Fernanda B. Borghi Pangonia, Luana M. Tunin, Kamila L. Bonifácio, Ana C. Nogueira, Luzmarina Hernandes, Fabio Yamashita, Décio S. Barbosa, Mauro L. Baesso, Maria da C. Torrado Truiti e Andréa Diniz

Revista Brasileira de Farmacognosia – DOI: 10.1016/j.bjp.2015.02.012

Phytopharmaceutical products are being used in the treatment and prevention of health problems. Nowadays, the development and evaluation of […]

Photodegradation in Micellar Aqueous Solutions of Erythrosin Esters Derivatives

Leandro Herculano da Silva, Gustavo V. B. Lukasievicz, Elizandra Sehn, Wilker Caetano, Diogo S. Pellosi, Noboru Hioka, Nelosn G. C. Astrath e Luis C. Malacarne

Applied Spectroscopy

Strong light absorption and high levels of singlet oxygen production indicate erythrosin B as a viable candidate as a photosensitizer in photodynamic therapy or photodynamic inactivation of microorganisms. Under light […]

Polyvinylpyrrolidone Quantification in Paracetamol Using Phase-Resolved Photoacoustic Method

Aloisi Somer, Julia G. Camilotti, A. Gonçalves, Claudia B. Kniphoff da Cruz, Flavio L. Beltrame, Francielle Sato, Nelson G. C. Astrath e Andressa Novatski

Spectroscopy Letters: An International Journal for Rapid Communication – Volume: 48; Issue: 6; Pages: 427-430; DOI: 10.1080/00387010.2014.902853

In this study, photoacoustic spectroscopy was used to quantify polyvinylpyrrolidone in paracetamol samples with different proportions of polyvinylpyrrolidone. […]

Pulsed photothermal mirror technique: characterization of opaque materials

Otávio A. Capeloto, Gustavo V. B. Lukasievicz, Vitor S. Zanuto, Leandro Herculano da Silva, Nilson E. Souza Filho, Andressa Novatski, Luis C. Malacarne, Stephen E. Bialkowski, Mauro L. Baesso e Nelson G. C. Astrath

Applied Optics – Volume: 53; Issue: 33; Pages: 7985-7991; DOI: 10.1364/AO.53.007985

The time-resolved thermal mirror technique is developed under pulsed laser excitation for […]

Room temperature nonlinear magnetoelectric effect in lead-free and Nb-doped AlFeO3 compositions

Luiz F. Cótica, Guilherme M. Santos, Valdirlei F. Freitas, Adelino A. Coelho, Madhuparna Pal, Ivair A. Santos, Ducinei Garcia, José A. Eiras, Ruyan Guo e Amar S. Bhalla

Journal of Applied Physics – Volume: 117; Issue: 6; Number Article: 064104; DOI: 10.1063/1.4908016

It is still a challenging problem to obtain technologically useful materials displaying strong magnetoelectric coupling […]

Solutions for a q-generalized Schrödinger equation of entangled interacting particles

Luiz G. de Andrade Alves, Haroldo V. Ribeiro, Maike A. Faustino dos Santos, Renio S. Mendes e Ervin K. Lenzi

Physica A: Statistical Mechanics and its Applications – Volume: 429; Pages: 35–44; DOI: 10.1016/j.physa.2015.02.063

We report on the time dependent solutions of the qq-generalized Schrödinger equation proposed by Nobre et al. (2011). Here we investigate the case of […]