Search results for "Semi"

Alkylsilyl compounds as enablers of atomic layer deposition: analysis of (Et3Si)3As through the GaAs process

2016

A new chemistry has been developed to deposit GaAs, the quintessential compound semiconductor. The ALD process is based on a dechlorosilylation reaction between GaCl3 and (Et3Si)3As. Characteristic ALD growth was demonstrated, indicating good applicability of the alkylsilyl arsenide precursor. ALD of GaAs produced uniform, amorphous and stoichiometric films with low impurity content. This was done with saturating growth rates and an easily controlled film thickness. Crystallization was achieved by annealing. Even though the growth rate strongly decreased with increasing deposition temperature, good quality film growth was demonstrated at 175 to 200 °C, indicating the presence of an ALD wind…

Progress in the Development of CdTe and CdZnTe Semiconductor Radiation Detectors for Astrophysical and Medical Applications

2009

Over the last decade, cadmium telluride (CdTe) and cadmium zinc telluride (CdZnTe) wide band gap semiconductors have attracted increasing interest as X-ray and gamma ray detectors. Among the traditional high performance spectrometers based on silicon (Si) and germanium (Ge), CdTe and CdZnTe detectors show high detection efficiency and good room temperature performance and are well suited for the development of compact and reliable detection systems. In this paper, we review the current status of research in the development of CdTe and CdZnTe detectors by a comprehensive survey on the material properties, the device characteristics, the different techniques for improving the overall detector…

Density functional/molecular dynamics simulations of phase-change materials

2013

C'era una volta il telefonino

1999

Normality

2018

The chapter explicates the central resources that classical Husserlian phenomenology and its contemporary elaborations offer for the study of psychic disorders. We shall first discuss the phenomenological principles that enable analysis of the conditions and limits of experiencing and sense-constitution. We shall then clarify the concepts that phenomenologists have developed for the discussion of the normality and abnormality of experiencing—optimality and concordance—while also paying heed to the types of phenomena that classical and contemporary phenomenologists have tackled while developing their methods. In this vein, we will emphasize methodological factors that separate phenomenologic…

Lavori in corso. Rubrica di aggiornamento

2008

Rubrica di aggiornamento sugli eventi scientifici, conferenze e convegni di storia delle religioni

Efectos de los campos eléctrico y magnético sobre los estados electrónicos excitados en nanoestructuras cuánticas semiconductoras

2013

Las nanoestructuras cuánticas semiconductoras ofrecen un gran potencial en cuanto al diseño de nuevos materiales con propiedades ópticas novedosas. El confinamiento cuántico y la aplicación de campos eléctrico y magnético externos muestran una riqueza de efectos cuánticos cuya aplicación es en muchos casos desconocida. Es notable al respecto la gran cantidad de comprtamientos no lineales que muestran, por ejemplo, la energía excitónica, los tiempos de recombinación, el efecto túnel y la consiguiente extinción de la señal espectral de fotoluminiscencia en los semiconductores. Lo notable de los modelos, y que queda confirmado por los experimentos es la competición entre tres efectos presentes…

Cytoprotective effects of the antioxidant phytochemical indicaxanthin in beta-thalassemia red blood cells

2006

Antioxidant phytochemicals are investigated as novel treatments for supportive therapy in beta-thalassemia. The dietary indicaxanthin was assessed for its protective effects on human beta-thalassemic RBCs submitted in vitro to oxidative haemolysis by cumene hydroperoxide. Indicaxanthin at 1.0-10 microM enhanced the resistance to haemolysis dose-dependently. In addition, it prevented lipid and haemoglobin (Hb) oxidation, and retarded vitamin E and GSH depletion. After ex vivo spiking of blood from thalassemia patients with indicaxanthin, the phytochemical was recovered in the soluble cell compartment of the RBCs. A spectrophotometric study showed that indicaxanthin can reduce perferryl-Hb ge…

Random Forest Analysis: A New Approach for Classification of Beta Thalassemia

2020

In recent years, Thalassemia care providers started classifying patients as transfusion-dependent-Thalassemia (TDT) or non-transfusion-dependent-Thalassemia (NTDT) owing to the established role of transfusion therapy in defining the clinical complication profile, although this classification was also based on expert opinion and is limited by reliance on patients’current transfusion status. Starting from a vast set of variables indicating severity phenotype, through the use of both classification and clustering techniques we want to explore the presence of two (TDT vs NTDT) or more clusters, in order to approaching to a new definition for the classification of Beta-Thalassemia in Thalassemia…

ChemInform Abstract: Tuning the Band Gap of PbCrO4Through High-Pressure: Evidence of Wide-to-Narrow Semiconductor Transitions.

2014

Commercial polycrystalline and cleaved platelets from natural PbCrO4 are studied in a diamond anvil cell at ≤ 21 GPa.