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 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.
†Institute of Methods for Materials Development, Helmholtz-Zentrum Berlin, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.
Tristan
T
Petit
‡Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan.
Hayato
H
Yuzawa
‡Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan.
Masanari
M
Nagasaka
§Nanocarbon Research Institute, Shinshu University, Ueda, Nagano 386-8567, Japan.
Ryoko
R
Yamanoi
§Nanocarbon Research Institute, Shinshu University, Ueda, Nagano 386-8567, Japan.
Eiji
E
Osawa
‡Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan.
Nobuhiro
N
Kosugi
†Institute of Methods for Materials Development, Helmholtz-Zentrum Berlin, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.|‡Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan.|∥Freie Universität Berlin, FB Physik, Arnimallee 14, 14195 Berlin, Germany.
Emad F
EF
Aziz
D003102:Colloids / Q000737:chemistry*; D058612:Nanodiamonds / Q000737:chemistry*; D013499:Surface Properties; D014867:Water / Q000737:chemistry*; D056928:X-Ray Absorption Spectroscopy
D003102:Colloids; D058612:Nanodiamonds; D014867:Water
X-ray absorption spectroscopy; colloids; hydrogen bonds; interfaces; nanodiamond; solvation