Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 1534 for “"amorphous"”.
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Carrier mobility of downscaled amorphous semiconductors exemplified by hydrogenated amorphous silicon
… Internet of Things (IoT) facilities. Amorphous semiconductors are among the most favoured channel semiconductors in TFTs because of their irreplaceable merits such as large-area uniformity, low cost and low thermal budget which are essential to the above use cases. Nevertheless, the …
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X-ray induced temperature dependent amorphous-amorphous transitions in the GeO2 glass
… mechanisms governing irradiation-induced amorphous-amorphous transitions in oxide glasses.
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Photoconductivity in amorphous silicon
… properties of undoped hydrogenated amorphous silicon have been extensively studied. Measurements of optical absorption, dark d.c. conductivity, steady state photoconductivity, step response transient rise photoconductivity and impulse response flash decay photoconductivity have been …
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Discrete, amorphous physical models
… new parallel computing architecture known as an amorphous computer.
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Optical Transitions in Amorphous Semiconductors
… analysis of the optical response of an amorphous semiconductor is presented. The entire analysis is cast within the framework of an empirical model for the valence band and conduction band density of states functions, that captures the basic features expected of these functions. A novel …
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Transient photoconduction in amorphous materials
… current pulses that would be expected for amorphous materials possessing known density of states distributions. Two simulation methods are used, the Monte Carlo technique and the finite difference method. While the Monte Carlo method makes few basic assumptions, the transients produced are …
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Microwave studies of amorphous silicon
… the intrinsic paramagnetic center (g=2.0055) in amorphous silicon have been studied in the 0.3 -1.2 K temperature range. Various sample preparation techniques were used, including ion implantation, sputtering, arid vacuum evaporation. The temperature dependence of the spin lattice relaxation …
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Vibrations in elemental amorphous semiconductors
… to structural models of the elemental amorphous semiconductors a-Ge, a-As and a-Se are presented. Simple dynamical models, involving restoring forces for bond length and angle variations only, provide information on the structure-dependence of the vibrational spectra and hence on the …
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Dissolution Behavior of Amorphous Solid Dispersions
… drug. Solubility enhancement techniques, such as amorphous solid dispersions (ASDs), can be used in oral dosage forms to increase the apparent solubility of the drug in the gastrointestinal tract thus increasing the bioavailability of the drug. However, the drug solution generated from the …
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Reversible electrical breakdown in amorphous chalcogenides
… been made of reversible electrical breakdown in amorphous chalcogenides with particular attention being paid to the on-state properties of Si12 Te48As30Ge10 glass threshold switches. Apparatus is described for the preparation of well-characterised materials and flash-evaporated thin-film …
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Surface Diffusion Kinetics on Amorphous Silicon
In addition, the parameters for self-diffusion on amorphous silicon at processing temperatures (above 635°C) are determined by analyzing our own series of HSG growth experiments using chemical vapor deposition. The results of this study are compared to HSG growth data obtained from MBE growth …
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Core excitons in amorphous magnesium alloys
… alloys. Sharp line structure was discovered for amorphous alloys of Mg-Bi and Mg-Sb near the photoabsorption threshold of the Mg 2p core level. These lines were strongest for compositions corresponding to the formation of intermetal1ic compounds in the crystalline solid, and are thought to be due …
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Measurements of magnetoresistance in amorphous alloys
Magnetoresistance data are presented on amorphous films of Gel Au, 8 Au, -x x 1-x x onto 10K sapphire substrates. Zero-field conductivity measurements show no systematic differences between the materials; magnetoresistance data reveal that the influence of spin-orbit coupling on the conductivity …
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Modelling morphogenesis as an amorphous computation
… as a self-organizing, self-repairing amorphous computation and describe how we can program large-scale shape formation by giving local instructions to cell-like objects. Our goal is to simulate systems that display properties, like robustness, regeneration, and evolvability, that are …
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