Search results for "Bridging oxygen"

Luminescenza risolta in tempo del non bridging oxygen hole center in silice: proprietà di volume e di superficie

2007

Zero phonon line associated with Non Bridging Oxygen Hole Center in silica: comparison between bulk and surface properties

2008

Resonance Raman of oxygen dangling bonds in amorphous silicon dioxide

2017

We investigate the origin of a resonance Raman band induced by ionizing radiation in amorphous silicon dioxide (silica glass), which can be detected under ultraviolet laser excitation. A silica sample, rich of oxygen-excess related defects, was prepared by treating some length of a pure-silica-core multimode fiber in an O2 atmosphere (at high temperature and pressure) and by irradiating it with X-rays at 10 MGy(SiO2) dose. A micro-Raman study revealed a gaussian band peaking at 896 cm−1 with a full width at half maximum of 32 cm−1, which could be detected by exciting the sample with the 325-nm line of a HeCd laser. This spectral feature is absent in the Raman spectra performed with the 442-…

Luminescence Properties of Non Bridging Oxygen Hole Centers at a Silica Surface

2008