Probing Interfacial Water on Nanodiamonds in Colloidal Dispersion

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 e...

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Published inThe journal of physical chemistry letters Vol. 6; no. 15; pp. 2909 - 2912
Main Authors Petit, Tristan, Yuzawa, Hayato, Nagasaka, Masanari, Yamanoi, Ryoko, Osawa, Eiji, Kosugi, Nobuhiro, Aziz, Emad F
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 06.08.2015
Subjects
Colloids - chemistry
Nanodiamonds - chemistry
Surface Properties
Water - chemistry
X-Ray Absorption Spectroscopy
nanodiamond
interfaces
X-ray absorption spectroscopy
colloids
solvation
hydrogen bonds
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Summary: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.
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ISSN:1948-7185
1948-7185
DOI:10.1021/acs.jpclett.5b00820