Zobrazeno 1 - 10
of 29
pro vyhledávání: '"G.K.B. Costa"'
Publikováno v:
Optical Materials. 60:506-512
This work presents photoluminescence data for gallium-niobium oxide with chromium ion as an impurity. The samples were obtained by the solid-state method (SSM) and the wet-chemical method (WCM) and investigated by X-ray diffraction, photoluminescence
Publikováno v:
Blucher Chemical Engineering Proceedings.
Autor:
Susete N. Fernandes, Yan Dalton Machado, Anderson S. L. Gomes, M. Helena Godinho, G.K.B. Costa, Lucas M. Martinho, Jake Fontana, Isabel C. S. Carvalho, Gleice C. M. Germano
Publikováno v:
2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
In this work, we systematically investigated the spectral analysis of the random laser action of Rhodamine6G (Rh6G) in Ethylene Glycol (EG) solution with cellulose nanocrystals (CNCs) as scatters to provide random feedback. A random laser (RL), diffe
Autor:
Jake Fontana, Sergio H. Domingues, Pilar G. Vianna, Daniel Grasseschi, Christiano J. S. de Matos, G.K.B. Costa, Isabel C. S. Carvalho
Publikováno v:
ACS Photonics. 3:1027-1035
We introduce a graphene oxide/gold nanorod nanocomposite as a surface-enhanced Raman spectroscopy (SERS) substrate that suppresses the usual temporal intensity fluctuations, commonly referred to as blinking. The temporal stability of the SERS spectra
Publikováno v:
Optical Materials. 99:109566
In this paper the synthesis of the LiNbZnO4 doped with Mn2+ by solid state method and its photoluminescence results are presented. The structural analysis was performed by X-ray diffraction and Rietveld refinement, while the emission of the impurity
Autor:
Natália S. Costa, Regina Helena Saramago Peralta, Isabel C. S. Carvalho, Regina Celia da Silva Barros Allil, G.K.B. Costa, José Mauro Peralta, Larissa M. B. Soares, Marcelo Martins Werneck
Publikováno v:
Latin America Optics and Photonics Conference.
We demonstrated an LSPR nanobiosensor in a colloidal solution of Au nanoparticles, for the binding between monoclonal antibody anti-T. solium and vesicular fluid from T. solium antigen. The sensor response had a limit detection of 0.06μg/mL, for ant
Publikováno v:
Materials Chemistry and Physics. 148:764-771
In this work, the optical properties of the gallium–niobium oxide doped with chromium ions were investigated. The samples were obtained by wet chemical and solid-state methods, investigated by X-ray powder diffraction and the data were refined by R
Autor:
Anderson S. L. Gomes, Melissa Maldonado, G.K.B. Costa, I. C. S. Carvalho, Jake Fontana, L. de S. Menezes, Leonardo F. Araujo
Publikováno v:
2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
Metallic colloids can confine and focus light below the diffraction limit, leading to interesting properties and applications, such as metamaterials and sensors. However, accurate knowledge of the refractive indices of these colloids is critical to d
Autor:
Arthur M. B. Braga, Isabel C. S. Carvalho, Paula M. P. Gouvêa, Antonio C. Bruno, F. C. Favero, Peter Palffy-Muhoray, Larissa M. B. Soares, João Pereira, G.K.B. Costa
Publikováno v:
Optics express. 24(13)
In this paper we discuss the results obtained with an in-fiber Fabry-Perot interferometer (FPI) used in strain and magnetic field (or force) sensing. The intrinsic FPI was constructed by splicing a small section of a capillary optical fiber between t
Autor:
Isabel C. S. Carvalho, Leonardo F. Araujo, Sebastián Etcheverry, G.K.B. Costa, João Pereira, Jake Fontana, Walter Margulis, Christiano J. S. de Matos, Alexandre R. Camara
Publikováno v:
Latin America Optics and Photonics Conference.
Optical properties of nanorods in the presence of external electric field when confined to a special optical fiber was investigated, showing an increase of the longitudinal absorption peak in the presence of the field.