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Electron‐transfer transparency of graphene: Fast reduction of metal ions on graphene‐covered donor surfaces
Author(s) -
Jeong Du Won,
Park Serin,
Choi Won Jin,
Bae Giyeol,
Chung Yun Jang,
Yang CheolSoo,
Lee Young Kuk,
Kim JuJin,
Park Noejung,
Lee JeongO.
Publication year - 2015
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201510014
Subject(s) - graphene , materials science , ion , substrate (aquarium) , electron transfer , metal , nanotechnology , metal ions in aqueous solution , nanomaterials , graphene oxide paper , graphene nanoribbons , nanoparticle , doping , photochemistry , optoelectronics , chemistry , oceanography , organic chemistry , geology , metallurgy
The mechanism of charge transfer through nanomaterials such as graphene remains unclear, and the amount of charge that can be transferred from/to graphene without damaging its structural integrity is unknown. In this communication, we show that metallic nanoparticles can be decorated onto graphene surfaces as a result of charge transfer from the supporting substrate to an adjoining solution containing metal ions. Au or Pt nanoparticles were formed with relatively high yield on graphene‐coated substrates that can reduce these metal ions, such as Ge, Si, GaAs, Al, and Cu. However, metal ions were not reduced on graphene surfaces coated onto non‐reducing substrates such as SiO 2 or ZnO. These results confirm that graphene can be doped by exploiting charge transfer from the underlying substrate; thus graphene is not only transparent with respect to visible light, but also with respect to the charge transfer. (© 2015 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)