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|a DE-627
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|e rakwb
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|a eng
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| 100 |
1 |
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|a Bailey, J Ryan
|e verfasserin
|4 aut
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| 245 |
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|a ATR-FTIR observations of water structure in colloidal silica
|b implications for the hydration force mechanism
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|c 2007
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 20.12.2007
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|a Date Revised 16.10.2007
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Attenuated total internal reflection Fourier-transform infrared spectroscopy (ATR-FTIR) was used to probe the change in water structure in silica colloids as a function of particle density. The absorption index (k) spectra were calculated from the ATR spectra using the subtractive Kramers-Kronig transform in order to avoid the effects of the density-dependent refractive index on the raw spectra and allow direct comparison of the different chemical environments. Normalized difference spectra were obtained by subtracting the k spectrum of bulk water from those of the silica colloids. At low particle densities, these difference spectra reveal the presence of a strongly hydrogen-bonded hydration layer at the surface of the colloidal particles. At higher particle densities, the hydrogen-bonding network is increasingly disrupted. The results provide direct experimental evidence of hydrogen-bond breaking as the mechanism for the hydration force, which provides the extraordinary stability of colloidal silica
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|a Journal Article
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|a McGuire, Molly M
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1991
|g 23(2007), 22 vom: 23. Okt., Seite 10995-9
|w (DE-627)NLM098181009
|x 0743-7463
|7 nnns
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| 773 |
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|g volume:23
|g year:2007
|g number:22
|g day:23
|g month:10
|g pages:10995-9
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|d 23
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|h 10995-9
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