Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Djalmir N. Messias"'
Autor:
Sthanley R. De Lima, Larissa R. Lourenço, Marina Thomaz, Djalmir N. Messias, Acácio A. Andrade, Viviane Pilla
Publikováno v:
Photochem, Vol 3, Iss 1, Pp 1-14 (2023)
In this work, we monitored the fluorescence quantum efficiency (η) and the fluorescence lifetime (τ) of natural dye extracts from the leaves of Tradescantia pallida purpurea. The natural dye was extracted from leaves in aqueous solutions as a funct
Externí odkaz:
https://doaj.org/article/8588d38594b74a608046dde805abd464
Autor:
Tácio T.S. Santos, Larissa R. Lourenço, Sthanley R. de Lima, Luiz R. Goulart, Djalmir N. Messias, Acácio A. Andrade, Viviane Pilla
Publikováno v:
Journal of Photochemistry and Photobiology, Vol 8, Iss , Pp 100080- (2021)
This work reports the thermo-optical and photophysical properties of annatto extracted from the seeds of the tropical shrub Bixa Orellana L. Aqueous natural dyes were extracted using different amounts of NH4OH solution (4 M) and separated into two gr
Externí odkaz:
https://doaj.org/article/67092a10f51f4976839c26622956cf0f
Autor:
Larissa R. Lourenço, Sthanley R. de Lima, Tácio T. S. Santos, Djalmir N. Messias, Acácio A. Andrade, Viviane Pilla
Publikováno v:
Latin America Optics and Photonics (LAOP) Conference 2022.
The natural dyes were extracted at different potential hydrogen (pH) values. The spectroscopy and fluorescence quantum yield were determined for annatto and anthocyanin. These solutions were evaluated as a possible pH indicator for adulterated milk.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1dcbc8f31a38ac817b1f102c07ebdd9
https://doi.org/10.1364/laop.2022.m3b.4
https://doi.org/10.1364/laop.2022.m3b.4
Autor:
Nilmar S. Camilo, Djalmir N. Messias, Viviane Pilla, Anielle C. A. Silva, Noelio O. Dantas, Acácio A. Andrade
Publikováno v:
Latin America Optics and Photonics (LAOP) Conference 2022.
In this work the CdS nanocrystals (NC) photoluminescence quantum efficiency (η) was determined by thermal lens technique. Due the high NC diameter a near-infrared emission is observed and η was determined η ~ 60%.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d754a21b3dfe09a7efe5f9650716f701
https://doi.org/10.1364/laop.2022.w4a.44
https://doi.org/10.1364/laop.2022.w4a.44
Autor:
Acácio A. Andrade, Viviane Pilla, Djalmir N. Messias, Jackson M. de Souza, Anielle Christine Almeida Silva, Noelio O. Dantas
Publikováno v:
Journal of Luminescence. 207:374-377
The effect of ion concentration on the saturation intensity, Is, was investigated and its effect on the evaluation of nonlinear optical properties was discussed. The suggested experimental approach points out a more accurate way to obtain Is. The val
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2dfcf95c7e1efca07412f72df1f34bd
https://doi.org/10.1016/j.jlumin.2018.11.040
https://doi.org/10.1016/j.jlumin.2018.11.040
Autor:
Djalmir N. Messias, José C.S. Filho, Anielle C.A. Silva, Sérgio Carlos Zílio, Viviane Pilla, Noelio O. Dantas, Acácio A. Andrade
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
The thermal expansion (α) and the thermo-optic (dn/dT) coefficients of a phosphate glass dubbed as PANK were simultaneously measured using a single arm double interferometer from 100 to 400 K of the temperature range. An athermal behavior of the opt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed2dd2caefcd0dc303a13f879e74951f
https://doi.org/10.1016/j.jallcom.2018.10.256
https://doi.org/10.1016/j.jallcom.2018.10.256
Autor:
Nilmar S. Camilo, Djalmir N. Messias, Viviane Pilla, Anielle C.A. Silva, Noelio O. Dantas, Acácio A. Andrade
Publikováno v:
Journal of Luminescence. 249:118956
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::767b3dfeab69558b1f19f30d19e4079a
https://doi.org/10.1016/j.jlumin.2022.118956
https://doi.org/10.1016/j.jlumin.2022.118956
Autor:
Djalmir N. Messias, Noelio O. Dantas, Sérgio Carlos Zílio, Viviane Pilla, Acácio A. Andrade, José C.S. Filho, Anielle C.A. Silva
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
P2O5–Al2O3–Na2O–K2O phosphate glasses with various K2O/Al2O3 ratios were synthesized using the melt quenching technique. Raman and absorption spectra were measured to investigate the effects of these ratios on the structures and spectroscopic p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e453aee77b5813ad5b16898dbfc927ce
Publikováno v:
Journal of Luminescence. 198:198-202
In this work, energy transfer between CdSe/ZnS quantum dots in mixtures containing two different sizes was investigated by the time resolved thermal lens technique. Using a mathematical model to account for the possible internal energy transfer proce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0a2e669a690687746fe6c2438e6e372
https://doi.org/10.1016/j.jlumin.2018.02.033
https://doi.org/10.1016/j.jlumin.2018.02.033
Autor:
Acácio A. Andrade, Djalmir N. Messias, Luiz Ricardo Goulart, Larissa R. Lourenço, Tácio T.S. Santos, Viviane Pilla, Sthanley R. de Lima
Publikováno v:
Journal of Photochemistry and Photobiology, Vol 8, Iss, Pp 100080-(2021)
This work reports the thermo-optical and photophysical properties of annatto extracted from the seeds of the tropical shrub Bixa Orellana L. Aqueous natural dyes were extracted using different amounts of NH4OH solution (4 M) and separated into two gr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6985c7c8280d1b1d4d20a9d0c99e1574
https://doi.org/10.1016/j.jpap.2021.100080
https://doi.org/10.1016/j.jpap.2021.100080