S
S. A. Tomás
Researcher at Instituto Politécnico Nacional
Publications - 81
Citations - 4695
S. A. Tomás is an academic researcher from Instituto Politécnico Nacional. The author has contributed to research in topics: Thin film & Absorption spectroscopy. The author has an hindex of 19, co-authored 77 publications receiving 4382 citations. Previous affiliations of S. A. Tomás include CINVESTAV.
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Atmospheric pollution profiles in Mexico City in two different seasons
TL;DR: In this article, a CO2-laser-based photoacoustic spectrometer was used to determine the temporal concentration profile of atmospheric ethene in Mexico City, and the results of this campaign were compared with data obtained in the winter of 2001.
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Development and characterization of composite edible films based on whey protein isolate and mesquite gum
Javier Osés,Mayra Fabregat-Vázquez,R. Pedroza-Islas,S. A. Tomás,Alfredo Cruz-Orea,Juan I. Maté +5 more
TL;DR: Physical properties and microstructure of films made of mixtures of whey protein isolate (WPI) and mesquite gum (MG) were investigated in this paper, where a photoacoustic method was used to measure water vapor diffusivity.
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The evolution of the Mo5+ oxidation state in the thermochromic effect of MoO3 thin films deposited by rf magnetron sputtering
TL;DR: In this article, the average luminous transmittance T ∗ lum was investigated as a function of the annealing temperature, T a, where the highest change was found in samples treated in argon, where T ∆ lum shifted from 71.69% at room temperature ( RT ) to 44.58% at 300 Â Â C.
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Influence of thermal annealings in different atmospheres on the band‐gap shift and resistivity of CdS thin films
S. A. Tomás,O. Vigil,Juan Jose Alvarado-Gil,R. Lozada‐Morales,O. Zelaya-Angel,H. Vargas,A. Ferreira da Silva +6 more
TL;DR: In this paper, photoacoustic spectroscopy was used to study the band-gap shift effect of CdS films, which were grown by chemical bath deposition and exposed to different annealing atmospheres over a range of temperature.
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Enhanced photocatalytic activity of TiO2-ZnO thin films deposited by dc reactive magnetron sputtering
TL;DR: In this paper, the effect of deposition conditions on the photocatalytic activity of TiO 2 -ZnO thin films was studied by using a (Ti) 90 -(Zn) 10 alloy target, the samples were deposited at room temperature on glass substrates by dc reactive magnetron sputtering and post-annealed in air at 500°C.