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pro vyhledávání: '"D.E. Azofeifa"'
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Autor:
Diana Valverde-Mendez, Michael Cambronero, William E. Vargas, E. Avendaño, D.E. Azofeifa, N. Clark, Hugo Solis
Publikováno v:
International Journal of Hydrogen Energy. 42:22373-22378
We report measurements of the optical transmission, between 240 and 1040 nm, and electrical resistivity of polycrystalline zirconium thin films as they absorb hydrogen. Both are measured as H 2 pressure is increased up to 880 mbar, at room temperatur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55f79837498eb19bca8b2880a82535ac
https://doi.org/10.1016/j.ijhydene.2017.01.190
https://doi.org/10.1016/j.ijhydene.2017.01.190
Publikováno v:
Journal of Alloys and Compounds. 645:S320-S324
An optimized parametric description of the dielectric function of thin granular Pd thin films is reported. The optical transmission spectra of 10, 15 and 20 nm thick films are measured and by means of an inversion procedure, the dielectric function o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8214c23f36351d2d5d2ae7a56a230101
https://doi.org/10.1016/j.jallcom.2014.12.153
https://doi.org/10.1016/j.jallcom.2014.12.153
Autor:
William E. Vargas, C. Barboza-Aguilar, A. Solís, Eduardo Libby, Marcela Hernández-Jiménez, D.E. Azofeifa
Publikováno v:
Journal of Quantitative Spectroscopy and Radiative Transfer. 160:63-74
Under normal incidence of non-polarized light, reflection spectra from the cuticle of golden-like C. aurigans scarabs shows a broad band displayed from 525 to 950 nm, with a spectral ripple structure that consists of a uniform sequence of peaks super
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7950ae51dd10c1f4769921f635c44d2
https://doi.org/10.1016/j.jqsrt.2015.03.014
https://doi.org/10.1016/j.jqsrt.2015.03.014
Publikováno v:
Physica Scripta. 94:055101
A parametric Drude-Lorentz (DL) model is used to describe the spectral variation of the dielectric functions of bulk palladium samples at low and room temperature. In addition to the contribution o ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::121e9219079bfb6f99bce82bf84597c0
https://doi.org/10.1088/1402-4896/ab07ee
https://doi.org/10.1088/1402-4896/ab07ee
Autor:
N. Clark, Gunnar K. Pálsson, William E. Vargas, Hugo Solis, D.E. Azofeifa, Björgvin Hjörvarsson
Publikováno v:
Journal of Alloys and Compounds. 580:S114-S118
Optical properties of 50 nm thick single crystal vanadium films deposited on double side polished MgO substrates have been obtained from spectrophotometric measurements. The films were coated with a polycrystalline Pd layer (5 nm thick) to protect th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e8fe2f9a9fe497cad8387022f145bbf4
https://doi.org/10.1016/j.jallcom.2013.03.146
https://doi.org/10.1016/j.jallcom.2013.03.146
Publikováno v:
Optical Materials. 35:175-183
Optical properties of the biopolymers chitin and chitosan have been considered for wavelengths between 250 and 750 nm. First, by inverting published refractive index data for composite chitosan–chitin samples of two independent sources, we have bee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d86ddc5ead1fe6831ea815446575f6c9
https://doi.org/10.1016/j.optmat.2012.07.024
https://doi.org/10.1016/j.optmat.2012.07.024
Autor:
Ángel Solís, Eduardo Libby, Cynthia Barboza-Aguilar, D.E. Azofeifa, William E. Vargas, Marcela Hernández-Jiménez, E. Avendaño
Publikováno v:
Biomimetics
Volume 3
Issue 4
Biomimetics, Vol 3, Iss 4, p 30 (2018)
Volume 3
Issue 4
Biomimetics, Vol 3, Iss 4, p 30 (2018)
A unified description involving structural morphology and composition, dispersion of optical constants, modeled and measured reflection spectra and photonic crystal characterization is devised. Light reflection spectra by the cuticles of scarab beetl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e7bb5c58fd5abe5b9e6dcc1f7114f972
https://doi.org/10.3390/biomimetics3040030
https://doi.org/10.3390/biomimetics3040030
Publikováno v:
Journal of Alloys and Compounds. :522-525
We measure the evolution of the optical transmission (200–760 nm) and the electrical resistivity of Ho films, 50 nm thick, as a function of H concentration up to 2.9 [H]/[Ho]. The Ho films are covered with a 15 nm thick Pd overcoat for hydrogenatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9bd419b37905ab5be457f399e527f703
https://doi.org/10.1016/j.jallcom.2007.02.061
https://doi.org/10.1016/j.jallcom.2007.02.061
Publikováno v:
Thin Solid Films. 515:8087-8093
Polycrystalline Dy thin films, coated with a very thin Pd layer, have been deposited on glass substrates by electron beam evaporation and subsequently hydrided. For hydrogen partial pressures larger than 0.7 kPa, a semiconductor character is displaye
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ad9fe8189f56988f2277322b65ee5d2
https://doi.org/10.1016/j.tsf.2007.04.030
https://doi.org/10.1016/j.tsf.2007.04.030