Surface haziness in chalcogenide glass

University essay from Uppsala universitet/Institutionen för materialvetenskap

Abstract: This study seeks to determine the source of haziness in chalcogenide glasses, and to serve as a basis for further investigations. XPS, Raman spectroscopy and SEM was used to characterise the surface. Raman spectroscopy was used first and the results  indicated structural changes. Subsequently XPS was used which found a difference between new and old samples regarding the As/Se ration. Vaporisation of As seems to be the main effect, the cause of which could not be determined. Later, SEM and EDS was used which provided morphological and compositional analysis of the samples. Precipitates and potential precursors were identified on the surface. A large amount of nickel was found on one sample which could not be explained. Alongside the experiments a literature study was conducted which sought to explain the structure and factors which could cause changes to the structure. Photo-induced phenomena as well as the manufacturing process were considered and studied.

  AT THIS PAGE YOU CAN DOWNLOAD THE WHOLE ESSAY. (follow the link to the next page)