title: Evidence of a unique electron donor-acceptor property for platinum nanoparticles as studied by XPS.
abstract: In the interaction of PVP with Pt nanoparticles <7 nm in size, charge transfer is from carbonyl groups in PVP to Pt nanoparticles, whereas in the interaction of PVP with bulk Pt or Pt nanoparticles >25 nm in size, charge transfer is from Pt metal to the polymer side chain of PVP. There exists a critical nanoparticle size between 7 and 25 nm that would lead to a switch in the electron donor-acceptor property.
authors.affiliation: Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, PR China.
authors.forename: Limei
authors.initials: L
authors.lastname: Qiu
authors.forename: Fen
authors.initials: F
authors.lastname: Liu
authors.forename: Liangzhong
authors.initials: L
authors.lastname: Zhao
authors.forename: Wensheng
authors.initials: W
authors.lastname: Yang
authors.forename: Jiannian
authors.initials: J
authors.lastname: Yao