Sum frequency generation and catalytic reaction studies of the removal of the organic capping agents from Pt nanoparticles by UV-ozone treatment Metadata

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  • Main Title Sum frequency generation and catalytic reaction studies of the removal of the organic capping agents from Pt nanoparticles by UV-ozone treatment


  • Author: Aliaga, Cesar
    Creator Type: Personal
  • Author: Park, Jeong Y.
    Creator Type: Personal
  • Author: Yamada, Yusuke
    Creator Type: Personal
  • Author: Lee, Hyun Sook
    Creator Type: Personal
  • Author: Tsung, Chia-Kuang
    Creator Type: Personal
  • Author: Yang, Peidong
    Creator Type: Personal
  • Author: Somorjai, Gabor A.
    Creator Type: Personal


  • Sponsor: Lawrence Berkeley Laboratory. Materials and Molecular Research Division.
    Contributor Type: Organization
    Contributor Info: Materials Sciences Division


  • Name: Lawrence Berkeley National Laboratory
    Place of Publication: Berkeley, California
    Additional Info: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States)


  • Creation: 2009-12-10


  • English


  • Content Description: We report the structure of the organic capping layers of platinum colloid nanoparticles and their removal by UV-ozone exposure. Sum frequency generation vibrational spectroscopy (SFGVS) studies identify the carbon-hydrogen stretching modes on poly(vinylpyrrolidone) (PVP) and tetradecyl tributylammonium bromide (TTAB)-capped platinum nanoparticles. We found that the UV-ozone treatment technique effectively removes the capping layer on the basis of several analytical measurements including SFGVS, X-ray photoelectron spectroscopy, and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The overall shape of the nanoparticles was preserved after the removal of capping layers, as confirmed by transmission electron microscopy (TEM). SFGVS of ethylene hydrogenation on the clean platinum nanoparticles demonstrates the existence of ethylidyne and di-{sigma}-bonded species, indicating the similarity between single-crystal and nanoparticle systems.


  • Keyword: Removal
  • Keyword: Ethylene
  • Keyword: Bromides
  • Keyword: Platinum
  • Keyword: X-Ray Photoelectron Spectroscopy
  • STI Subject Categories: 37
  • Keyword: Hydrogenation
  • Keyword: Colloids
  • Keyword: Shape
  • Keyword: Spectroscopy
  • Keyword: Transmission Electron Microscopy


  • Journal Name: Journal of Physical Chemistry C; Journal Volume: 113; Journal Issue: 15


  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article


  • Text


  • Report No.: LBNL-2425E
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1021/jp8108946
  • Office of Scientific & Technical Information Report Number: 971855
  • Archival Resource Key: ark:/67531/metadc928545