Electron‐transfer transparency of graphene: Fast reduction of metal ions on graphene‐covered donor surfaces |
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| Authors: | Du Won Jeong Serin Park Won Jin Choi Giyeol Bae Yun Jang Chung Cheol‐Soo Yang Young Kuk Lee Ju‐Jin Kim Noejung Park Jeong‐O Lee |
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| Affiliation: | 1. Department of Physics, Chonbuk National University, Chonju, Korea;2. Advanced Materials Division, Korea Research Institute of Chemical Technology, Daejeon, Korea;3. Division of Nanoscale Semiconductor Engineering, Hanyang University, Seoul, Korea;4. Department of Physics, Ulsan National Institute of Science and Technology, Center for Multidimensional Carbon Materials, Institute for Basic Science (IBS), Ulsan, Korea |
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| Abstract: | 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 SiO2 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) |
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| Keywords: | graphene metal decoration doping electron affinity electron transparency galvanic displacement |
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