Synthesis of nanoscale silicon oxide oxidation state distributions: The transformation from hydrophilicity to hydrophobicity

[Display omitted] •Transformation of silicon oxide nanoparticles from hydrophobic to hydrophilic.•Correlation of water absorption with the Si/O ratio.•Characterization of silicon oxide nanoparticles by a broad range of techniques.•Oxidation state for nanostructured oxides shifts from +III to combina...

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Bibliographic Details
Published in:Chemical physics letters 2016-06, Vol.653 (C), p.137-143
Main Authors: Laminack, William, Gole, James L., White, Mark G., Ozdemir, Serdar, Ogden, Andrew G., Martin, Holly J., Fang, Zongtang, Wang, Tsang-Hsiu, Dixon, David A.
Format: Article
Language:English
Subjects:
Hydrophilic
Hydrophobic
Nanostructures
Oxidation state changes
Reflectance infrared spectroscopy
Scanning electron microscopy
Silicon oxide
Thermogravimetric analysis
X-ray photoelectron spectroscopy
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Summary:[Display omitted] •Transformation of silicon oxide nanoparticles from hydrophobic to hydrophilic.•Correlation of water absorption with the Si/O ratio.•Characterization of silicon oxide nanoparticles by a broad range of techniques.•Oxidation state for nanostructured oxides shifts from +III to combination of +II and +III. Silicon oxide nanostructures which span the range from hydrophilic to hydrophobic have been synthesized. The surface chemistry of these silicon-based nanostructures was analyzed using a combination of X-ray photoelectron spectroscopy, reflectance infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis. The dominant oxidation state for the nanostructured oxides shifts from an average oxidation state of +III to a combination of +II and +III oxidation states. A correlation of the ability to adsorb water with variations in the surface Si:O ratios was observed showing a transition from hydrophilic to hydrophobic character.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2016.04.079