University of Erlangen-Nuremberg

About: University of Erlangen-Nuremberg is a education organization based out in Erlangen, Bayern, Germany. It is known for research contribution in the topics: Population & Immune system. The organization has 42405 authors who have published 85600 publications receiving 2663922 citations.

Doped TiO2 and TiO2 Nanotubes: Synthesis and Applications

Abstract: TiO(2) is one of the most investigated compounds in contemporary materials science. Due to a set of virtually unique electronic properties, it finds intense use in photoelectrochemical applications such as photocatalysis or solar cells. The main drawback in view of direct exploitation of solar-light-based effects is its large band gap of >3 eV. Visible-light-activated TiO(2) can be prepared by doping (band-gap engineering) through incorporation or decoration with other metal ions, nonmetal ions, and semiconductors. Most recently, efforts in TiO(2) research have been even more intensified by the finding of self-organized nanotubular oxide architectures that can be prepared by a simple but optimized anodization of Ti metal surfaces. These nanotubular geometries provide large potential for enhanced and novel functional features. This Review examines doped TiO(2) and in particular TiO(2) nanotubes. Various types of dopants, doping methods, and applications of modified TiO(2) nanotubes are discussed.

Dose reduction in CT by anatomically adapted tube current modulation. I. Simulation studies.

Abstract: The physical principles of dose reduction in computed tomography (CT) by anatomy-oriented attenuation-based tube current modulation, as discussed elsewhere in this volume (see Chap. 4), were tested in a first clinical patient study. Our aim was to reduce the dose applied in CT by current modulation and without a loss of image quality. Dose reduction was measured by the reduction of the mAs product, and image quality was assessed subjectively by experienced radiologists.