A5043109314- Semiconductor Quantum Structures and Devices
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Advanced Semiconductor Detectors and Materials
- Semiconductor materials and devices
- Gas Sensing Nanomaterials and Sensors
- Semiconductor materials and interfaces
- ZnO doping and properties
- Transition Metal Oxide Nanomaterials
- Copper-based nanomaterials and applications
- Thermography and Photoacoustic Techniques
- TiO2 Photocatalysis and Solar Cells
- Advanced Chemical Sensor Technologies
- Spectroscopy and Chemometric Analyses
- Analytical Chemistry and Sensors
- Advanced Photocatalysis Techniques
- Edible Oils Quality and Analysis
- Photoacoustic and Ultrasonic Imaging
- Conducting polymers and applications
- Electrospun Nanofibers in Biomedical Applications
- Plant Physiology and Cultivation Studies
- Insect Utilization and Effects
- Bee Products Chemical Analysis
- Luminescence Properties of Advanced Materials
- Essential Oils and Antimicrobial Activity
Instituto Politécnico Nacional
2015-2024
Center for Research and Advanced Studies of the National Polytechnic Institute
1977-2021
Benemérita Universidad Autónoma de Puebla
2016-2021
Autonomous University of Tlaxcala
2006-2018
BAE Systems (Sweden)
2012
Tecnológico Nacional de México
2012
Karlsruhe Institute of Technology
2011
Aarhus University
2011
Japan Atomic Energy Agency
2011
We studied the effect of annealing temperature on physical properties WO 3 thin films using different experimental techniques. has been prepared by hot-filament metal oxide deposition (HFMOD). The films, chemical stoichiometry was determined X-ray photoelectron spectroscopy (XPS). monoclinic single-phase nature as-deposited structure changed to triclinic them at higher temperatures than 400°C, which diffraction analysis. By Raman scattering is confirmed change crystalline phase, triclinic,...
The widespread use of gold nanoparticles (Au-NP) as nanocarriers has led to several studies in animal cells evaluate their cytotoxic ef fects. In contrast, little is known about the impact on photosynthesis and plant growth. this work, we present a study physiological morphological responses bryophytes Au-NPs prepared with dif ferent contents polyethyleneimine (PEI) using Physcomitrium patens (P. patens) model system. Results are presented where without PEI induce generation larger...
In this work highlights the modifications of crystalline structure and properties nanostructured cadmium sulphide (CdS) thin films, including gold quantum dots grown to form a hybrid metal-semiconductor system. By means chemical bath deposition (CBD) good quality films are obtained, with advantage doping in-synthesis no required additional steps. Film thicknesses around 100 nm were determined by ellipsometry. The binding energies elements in CdS CdS-Au samples measured X-ray photoelectronic...
Whey is produced during cheese manufacture, some of its constituents are lactose and proteins. In different countries such con- stituents separated for use as raw material; the processes to separate these components by ultra nano-filtration, however most common methods determination proteins not accurate. This paper shows that infrared spectroscopy a good alternative quantification after ultra- nano-filtration processes. Linear calibration curves were obtained with this analytical technique...
The electrospinning technique has been used to synthesize TiO2 nanofibres, which by annealing at high temperatures in a wide range achieves the crystal phase transformation of anatase rutile passing through anatase+rutile mixed. investigated temperature was 0-1000°C. nanofibres chemical stoichiometry and surface morphology were obtained Scanning Electron Microscopy Energy Dispersive Spectrometry. diameter ranged from 137.0 115.3 nm interval influence on structure quality TiO2crystal X-ray...
Abstract The purpose of this study was to evaluate the decay squalene and formation trans fatty acids (TFAs) in amaranth oil extracted with hexane without heat. Oils were analyzed by determining their chemical values, identified quantified using Fourier-transform infrared (FTIR) spectroscopy, mid-region 400–4000 cm−1, gas chromatography. FTIR analysis shows that two extracts (with heat) present a well-defined peak at 968 which represents double bonds. TFAs are
Rare earths (Europium, cerium)-doped CdS nanofilms are prepared using the growth technique chemical bath deposition (CBD) at reservoir temperature of 70±2°C varying synthesis time in a wide range. For rare doped was ranged from 80 to 135 min. The molar concentration range 0.0≤x≤3.47, which determined by energy dispersive X-ray spectroscopy (EDS). diffraction (XRD) analysis reveals that showed zinc blende (ZB) crystalline phase. nanocrystal size 2.67 2.35 nm for and 1.84-2.33 earth-doped were...
We have calculated the spin-polarized spectrum of electrons photoemitted by circularly polarized light in tungsten. Results are given for free and cesiated surfaces along [100] [111] directions. In [110] direction there is no spin polarization. The calculation based on three-step model involves a group-theoretical analysis direct optical excitations their joint density states. 100% polarization predicted certain photon energy regions.