Probing Interfacial Water on Nanodiamonds in Colloidal Dispersion

Tristan Petit, Hayato Yuzawa, Masanari Nagasaka, Ryoko Yamanoi, Eiji Osawa, Nobuhiro Kosugi, Emad F. Aziz

Research output: Contribution to journalArticleResearchpeer-review

39 Citations (Scopus)

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 languageEnglish
Pages (from-to)2909-2912
Number of pages4
JournalJournal of Physical Chemistry Letters
Volume6
Issue number15
DOIs
Publication statusPublished - 6 Aug 2015
Externally publishedYes

Keywords

  • colloids
  • hydrogen bonds
  • interfaces
  • nanodiamond
  • solvation
  • X-ray absorption spectroscopy

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