Thermoanalytic and spectroscopic investigations of hydride structures on the surface of amorphous silicon dioxide

Abstract

The surface of amorphous silicon dioxide is hydrogenated and the hydride structures obtained are investigated by means of thermoanalytic and infrared spectroscopic measurements. Different hydride groups are found by IR spectroscopy. The results are confirmed by thermal measurements. The experimentally determined bond parameters of the surface silane centers document the differences in comparison with the Si–H bonds of other silanes. Model structures with comparable characteristics of the silicon–hydrogen bond lead to conclusions concerning the surface texture of the adsorbent.