論文

査読有り
2011年

Electronic structure of sub-10 nm colloidal silica nanoparticles measured by in situ photoelectron spectroscopy at the aqueous-solid interface

PHYSICAL CHEMISTRY CHEMICAL PHYSICS
  • Matthew A. Brown
  • ,
  • Robert Seidel
  • ,
  • Stephan Thuermer
  • ,
  • Manfred Faubel
  • ,
  • John C. Hemminger
  • ,
  • Jeroen A. van Bokhoven
  • ,
  • Bernd Winter
  • ,
  • Martin Sterrer

13
28
開始ページ
12720
終了ページ
12723
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1039/c1cp21131e
出版者・発行元
ROYAL SOC CHEMISTRY

X-Ray photoelectron spectroscopy has been extended to colloidal nanoparticles in aqueous solution using a liquid microjet in combination with synchrotron radiation, which allowed for depth-dependent measurements. Two distinct electronic structures are evident in the Si 2p photoelectron spectrum of 7 nm SiO(2)-nanoparticles at pH 10. A core-shell model is proposed where only the outermost layer of SiO(2) nanoparticles, which is mainly composed of deprotonated silanol groups, >Si-O(-), interacts with the solution. The core of the nanoparticles is not affected by the solvation process and retains the same electronic structure as measured in vacuum. Future opportunities of this new experiment are also highlighted.

リンク情報
DOI
https://doi.org/10.1039/c1cp21131e
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000293460400007&DestApp=WOS_CPL
ID情報
  • DOI : 10.1039/c1cp21131e
  • ISSN : 1463-9076
  • Web of Science ID : WOS:000293460400007

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