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Evidence of a Unique Electron Donor−Acceptor Property for Platinum Nanoparticles as Studied by XPS

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journal contribution
posted on 09.05.2006, 00:00 by Limei Qiu, Fen Liu, Liangzhong Zhao, Wensheng Yang, Jiannian Yao
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.

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