This research is preparing a Nanostructure zinc oxide thin films by sol-gel methods, we use spin coating method to coat the gel on the substrate, and then put the substrate from 100¢XC -500¢XC for 10 min after each coating. We change the concentration of sol-gel¡Badd dispersing agents and change the temperature of heat treatment to confer structure and morphology of nanostructure zinc oxide thin film. Through the experimentation we can know when the concentration of sol-gel become low, the film properties of zinc oxide thin films will become bad. And the thickness of zinc oxide thin films will become thick with increasing the concentration of sol-gel.And adding appropriate dispersing agents will become different morphology of ZnO thin film surface, on the other side, when the different temperature of heat treatment, the nature of crystal¡Broughness of the surface and photoelectric character will change. Then we accede AmAc to sol-gel solution will dope n ion into the ZnO thin film, and the thin film with doping n ion has better electric characteristic than without doping. In the end, we Prepare ZnO thin film to apply as thin film transistor, we can make a p-type channel TFT successfully. TFT's critical voltage is -0.72V,carrier mobility is 0.29 cm2/Vs and On/Off ratio is 1.1E4.

Thesis (Ph. D.)--Florida State University, 2002. / Advisor: Dr. David H. Van Winkle, Florida State University, College of Arts and Sciences, Dept. of Physics. Title and description from dissertation home page (viewed Oct. 3, 2003). Includes bibliographical references.

Zugl.: Clausthal, Techn. Univ., Diss., 2009

No description available.

Polymer gel dosimeters are a three dimensional (3D) dosimetry system that may be conveniently applied for verifying highly conformal radiation therapies where standard dosimetry techniques are insufficient. Polymer gel dosimetry with optical computed tomography (OptCT) can be used to measure spatial dose distributions with high resolution. While long experience with MRI has yielded many studies reporting on experiments involving validation of clinical deliveries using polymer gel dosimeters, there are very few studies of this type where OptCT is used. OptCT is a relatively new technique and consequently has not yet been adopted into the clinical environment. As a result, methods and software tools for integrating OptCT measurements into clinical systems are not available. Previous studies from the Medical Physics research group at the Cancer Centre of Southeastern Ontario (CCSEO) and Queen’s University have therefore been limited to simple deliveries and two dimensional (2D) comparisons. In this thesis various software tools and calibration techniques have been developed to allow comparative analysis between OptCT measurements with dose distributions calculated by treatment planning software. Further, a modification of the γ-evaluation (Low et al. 1998) is presented whereby the vector components of γ are used to identify the sources of disagreement between compared dose distributions. Test simulations of the new γ-tool revealed that individual vector components of γ, as well as the resulting vector field can be used to identify certain types of disagreements between dose distributions: especially spatial misalignments caused by geometric misses. The polymer gel dosimetry tools and analysis software were applied to a clinical validation mimicking a prostate conformal treatment with patient setup correction using image guidance. In one experiment greater than 90 % agreement was found between dose distributions in 4%T 50%C NIPAM/Bis dosimeters (Senden et al. 2006) measured with the Vista OptCT unit and dose distributions calculated by Eclipse treatment planning software. / Thesis (Master, Physics, Engineering Physics and Astronomy) -- Queen's University, 2008-12-18 15:46:33.78

No description available.

No description available.

Universiẗat, Diss., 2007--Giessen.

Th. univ.--Chim.--Paris 6, 1992. / Résumé en anglais et en français. Notes bibliogr.

Proefschrift--Ghent. / Includes bibliographical references.