Abstract
The structure of interfacial water layers around nanoparticles dispersed in an aqueous environment may have a significant impact on their reactivity and on their interaction with biological species. Using transmission soft X-ray absorption spectroscopy in liquid, we demonstrate that the unoccupied electronic states of oxygen atoms from water molecules in aqueous colloidal dispersions of nanodiamonds have a different signature than bulk water. X-ray absorption spectroscopy can thus probe interfacial water molecules in colloidal dispersions. The impacts of nanodiamond surface chemistry and concentration on interfacial water electronic signature are discussed.
Original language | English |
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Pages (from-to) | 2909-2912 |
Number of pages | 4 |
Journal | Journal of Physical Chemistry Letters |
Volume | 6 |
Issue number | 15 |
DOIs | |
Publication status | Published - 6 Aug 2015 |
Externally published | Yes |
Keywords
- colloids
- hydrogen bonds
- interfaces
- nanodiamond
- solvation
- X-ray absorption spectroscopy