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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Journal ArticleDOI
Effect of the Sb content and the n− and p−GaSb(100) substrates on the physical and chemical properties of InSbxAs1-x alloys for mid-infrared applications: Analysis of surface, bulk and interface
Y. L. Casallas-Moreno,M. Ramírez-López,G. Villa-Martínez,A.L. Martínez-López,M. Macias,Alfredo Cruz-Orea,G. González de la Cruz,S. A. Tomás,P. Rodríguez-Fragoso,J. L. Herrera-Pérez,J.G. Mendoza-Alvarez +10 more
TL;DR: In this article, the growth of InSbxAs1-x alloys on n − and p − type GaSb(100) substrates varying the Sb mole fraction (x ), using the liquid phase epitaxy (LPE) technique, is reported.
Journal ArticleDOI
Application of photoacoustic spectroscopy to the optical study of pigments in corn pericarp: Spectral separation of optical absorption centres
R. A. Muñoz Hernández,A. Calderón,A. Cruz Orea,S. A. Tomás,F. Sánchez Sinencio,G. Peña Rodriguez +5 more
TL;DR: In this article, the optical absorption centres in corn pericarp biopolymers have been studied by photoacoustic spectroscopy and the phase-resolved technique, and it was shown that the absorption spectra of these samples are formed by the superposition of two absorption bands, one corresponding to the cellulose of the epidermis and the other to o-glucoside pigments of flavonoid type which are bound to hemicellulose sugars.
Development and characterization of composite edible films based on wheyprotein isolate and mesquite gum
Ruth Pedroza Islas,Javier Osés,Mayra Fabregat Vázquez,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 article, where a photoacoustic method was used to measure water vapor diffusivity.
Caracterización Óptica de Centros Absorbentes en Películas Biopoliméricas Obtenidas de Pericarpio de Maíz
R. A. Muñoz Hernández,A. Calderon,Alfredo Cruz-Orea,S. A. Tomás,F. Sánchez Sinencio,G. Peña Rodriguez +5 more
TL;DR: In this paper, a study about the optical caracterization of the absorption centers in corn pericarp biopolymers by means of the Photoacoustic Spectroscopy and Phase Resolved technique is presented.
Journal ArticleDOI
Photoinduced charge transfer in molecular materials studied by optical absorption using photoacoustic spectroscopy
TL;DR: In this paper, photoacoustic spectra of molecular materials based on the assembling of the [Fe(CN)6] molecular block were recorded and evaluated, where the valence of the involved metals allowed a charge transfer (an inner photoinduced redox reaction) through the CN ligand shown an intense photo-acoustic signal around 600 nm; when this transition is unable only the signal corresponding to metal-toligand and d-d transitions within the metal were observed.