A5033444617- Luminescence Properties of Advanced Materials
- Radiation Detection and Scintillator Technologies
- Gas Sensing Nanomaterials and Sensors
- ZnO doping and properties
- Diamond and Carbon-based Materials Research
- Radiation Effects and Dosimetry
- Nuclear materials and radiation effects
- Ion-surface interactions and analysis
- Organic and Molecular Conductors Research
- Magnetism in coordination complexes
- Quantum Dots Synthesis And Properties
- Solid-state spectroscopy and crystallography
- High-pressure geophysics and materials
- Perovskite Materials and Applications
- Copper-based nanomaterials and applications
- Ga2O3 and related materials
- Chemical Synthesis and Characterization
- Ionic liquids properties and applications
- Semiconductor materials and devices
- Mineralogy and Gemology Studies
- Nanoparticles: synthesis and applications
- Optical Coatings and Gratings
- Cultural Heritage Materials Analysis
- Pigment Synthesis and Properties
- Electrodeposition and Electroless Coatings
Universidad de Sonora
2015-2024
<p>The objective of this project was to synthesis and comparative characterization nanocrystalline opals. Synthesis technique called Stöber allows obtaining nano micro particles monodisperse. Natural opal origin Mexican utilized as reference. The results obtained indicated crystalline phases in the opal, presence water is shown through x-ray diffraction FTIR Raman spectra, respectively. Scanning electron microscopy illustrated spherical nanoparticle silicon. We conclude that synthetic...
High‐dose thermoluminescence dosimetry properties of novel zinc oxide nanophosphors synthesized by a solution combustion method in glycine‐nitrate process are presented for the very first time this work. Sintered particles with sizes ranging between ~500 nm and ~2 μ m were obtained annealing ZnO at 900°C during 2 h air. X‐ray diffraction patterns indicate presence hexagonal phase, without any remaining nitrate peaks observed. Thermoluminescence glow curves after being exposed to beta...
In this work, we report on the thermoluminescence (TL) and optically stimulated luminescence (OSL) of ZnO nanophosphors obtained by thermal annealing ZnS powders synthesized precipitation in a chemical bath deposition reaction. To obtain nanocrystalline ZnO, pellet-shaped samples were subjected to sintering process at 700 °C during 24 h exposed air atmospheric pressure. Some beta particles 0.15–10.15 kGy dose range integrated TL as function increased with level, no saturation indication for...
Abstract Background Silica nanoparticles are being developed as a host of biomedical and biotechnological applications. For this reason, there more studies about biocompatibility silica with amorphous crystalline structure. Except hydrated (opal), despite is presents directly indirectly in humans. Two sizes opal were investigated work under criteria toxicology. Methods In particular, cytotoxic genotoxic effects caused by (80 120 nm) evaluated cultured mouse cells via set bioassays,...
Nanosized ZnO:Mg phosphors were synthesized through a controlled chemical reaction. X-ray diffraction patterns confirmed that Mg entered in substitutive way Zn sites. To investigate their thermoluminescence (TL) properties, some samples exposed to beta-particle irradiation. The results reported here show doping improves ZnO TL features are important for dosimetry applications, such as the shape of glow curve, temperature at which maximum intensity is observed, and fading reproducibility. No...
Nanodiamond thin films were deposited onto Si (100) substrates using Tequila as precursor by pulsed-liquid injection chemical vapour deposition at 850 degrees C. Some samples exposed to beta particle irradiation in the dose range from 100 1600 Gy, and it was found that thermoluminescence (TL) response is a linear function of dose. The glow curve displays two maxima centred 170 350 C, which does not shift when changes, indicating first-order kinetics processes are involved. From results,...
In this work, we report the thermoluminescence (TL) properties of self-agglomerating CaSO 4 :Eu samples obtained by an environmentally friendly coprecipitation technique. No binding material is needed to form solid samples. Samples exposed beta particle irradiation exhibit a TL maximum at 473.15 K when 5 K/s heating rate used, they are two times more sensitive than TLD-100 commercial dosimeter, and their lower detection limit was determined be less 0.69 mGy. The computerized glow curve...
The reaction between 1,4,8,11-tetraazacyclotetradecanecopper(II) perchlorate and sodium sulfide gave a transparent amorphous CuS film supported on polyethylene substrate. surface electrical resistivity of the was ca. 10 k Ω□ at 300 K showed metal-like temperature dependence down to 250 K.
Thermoluminscence (TL) properties of diamond films grown by microwave and hot filament CVD techniques were studied. The main purpose the present work was to characterize thermoluminescence response ultraviolet beta radiation. excitation spectrum exhibits maximum TL efficiency around 210–215 nm. All samples presented a glow curve composed at least one peak showed regions linear as well supralinear behavior function or irradiation dose. dose dependence found for up sixteen minutes...
Abstract The thermoluminescence (TL) characterization of a 10 µm thick microwave plasma chemical vapor deposited (MWCVD) diamond film grown on (001) silicon substrate and exposed to β‐rays ultraviolet (UV) light was performed. Several TL glow peaks between 300 580 K as well highest intensity first order peak located at 610 are present in the beta radiation samples. UV irradiated samples exhibit mainly that is fully same creation spectrum spans 200–400 nm range with maximum efficiency around...
Abstract Hot filament chemically vapor deposited (HFCVD) boron doped diamond films were grown on monocrystalline silicon (111) with B/C ratios of 4000, 8000 and 12,000 ppm. Scanning electron micrographs show that the are composed well‐faceted microcrystallites ranging in size from about 1 to 5 µm no correlation concentration. The Raman spectra exhibit a sharp dia‐ mond band at 1332 cm –1 which shifts lower wave numbers, broaden decreases as ratio increases. An additional broad is observed...