Controlling surface hydroxylation of nanoporous silica by ion bombardment
作者： E Van Cleve , S Charnvanichborikarn , S O Kucheyev
DOI: 10.1088/0022-3727/45/44/445307
关键词: Chemical engineering 、 Ion bombardment 、 Nanoporous 、 Mass spectrometry 、 Stopping power 、 Ion 、 Inorganic chemistry 、 Hydrogen molecule 、 Hydroxylation 、 Desorption 、 Materials science 、 Acoustics and Ultrasonics 、 Electronic, Optical and Magnetic Materials 、 Surfaces, Coatings and Films 、 Condensed matter physics
摘要: Due to a large fraction of undercoordinated surface atoms in nanoporous solids, the composition could have profound effect on their properties. Here, we use mass spectrometry study ion-beam-induced desorption from silica aerogels. Results show that dominant species is hydrogen molecule. Bombardment with ions different masses causes dehydroxylation nanoligaments, efficiency scaling linearly electronic stopping power ions. These results demonstrate ion bombardment can be used for controlling hydroxylation silica.
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