Showing result 1 - 5 of 88 essays containing the word röntgen..

1. ## 1. In situ X-ray diffraction studies of vertically aligned CsPbBr3 nanowire arrays

University essay from Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

Keywords : Physics and Astronomy;

Abstract : The past decade has seen a great interest in the development of metal halide perovskite materials for use in photo-optical devices, due to the excellent photo-optical properties of these materials. The primary limitation to industrial adoption, and the subject of much research, is the susceptibility of these materials to degradation from exposure to various factors such as air, heat and moisture. READ MORE

2. ## 2. Gas in Scattering Media Absorption Spectroscopy in Large Geometries: Towards Monitoring Oxygen in Adult Lungs

University essay from Lunds universitet/Förbränningsfysik; Lunds universitet/Fysiska institutionen

Keywords : Physics and Astronomy;

Abstract : GAs in Scattering Media Absorption Spectroscopy (GASMAS) is a technique to study free gas inside strongly scattering bulk-materials. GASMAS is successful in safely measuring oxygen in lungs of neonates, with low-power tuneable diode-laser spectroscopy at 760 nm. READ MORE

3. ## 3. An Infrared Stellar Thermometer: Exploiting IGRINS Spectra

University essay from Lunds universitet/Astronomi

Abstract : Using the infrared (IR) spectral range when measuring stellar spectra is beneficial compared to using the optical range mainly when observing distant stars through the dust dense interstellar regions in the Galactic mid-plane. Methods to determine stellar parameters from IR spectra are, however, not fully developed yet because technological difficulties in creating reliable IR detectors have slowed the advance of such methods. READ MORE

4. ## 4. 2D & 3D phase retrieval for propagation-based X-ray phase-contrast tomography

University essay from Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

Abstract : Propagation-based X-ray phase-contrast tomography is a 3d imaging technique that utilizes two-dimensional projections from different angular views $\theta =[0,\pi]$ to reconstruct the 3D object information. The phase-contrast allows for higher feature contrast than conventional transmission tomography, as the phase interference gives rise to a sharp edge contrast. READ MORE

5. ## 5. Frontier materials at the air-liquid interface: Self-assembly of green ionic liquids

University essay from KTH/Yt- och korrosionsvetenskap

Abstract : The interfacial structuring of three non-halogenated ionic liquids was examined at the air-liquid interface for both dry and humid condition by analysis of X-ray reflectometry data using a slab model approach. The aim was to investigate the effect of humidity on the air-liquid interface. READ MORE