Experimental Studies on Plasmon Resonance of Ag Nanoparticles on Highly Ordered Pyrolytic Graphite (HOPG)

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BullKorChemSoc27.pdf
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2006
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Lopez-Salido, Ignacio
Bertram, Nils
Lim, Dong Chan
Kim, Young Dok
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Bulletin of the Korean Chemical Society. 2006, 27(4), pp. 556-562
Zusammenfassung

Studies on Ag nanoparticles grown on Highly Ordered Pyrolytic Graphite (HOPG) using HREELS provide different results for smaller and larger particle sizes corresponding to Ag coverages below and above 4 monolayers, respectively. For the larger particles, a positive frequency shift with decreasing particle size and a broadening of the plasmon resonance were observed with decreasing particle size, in line with previous studies on Ag on alumina. For the smaller particles, in contrast, a shift to lower energy with decreasing particle size, and a narrowing of the plasmon resonance with decreasing particle size can be found. The asymmetry of the Ag-features present for Ag coverages above 4 monolayers disappears for Ag coverages below 4 monolayers. The result for the smaller particles can be rationalized in terms of change of the particle growth mode with increasing particle size, which corroborates our STM data, as well as electronic effects due to the metal/support charge transfer.

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Fachgebiet (DDC)
530 Physik
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Ag, HOPG, Plasmon resonance, Electron spectroscopy
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ISO 690LOPEZ-SALIDO, Ignacio, Nils BERTRAM, Dong Chan LIM, Gerd GANTEFĂ–R, Young Dok KIM, 2006. Experimental Studies on Plasmon Resonance of Ag Nanoparticles on Highly Ordered Pyrolytic Graphite (HOPG). In: Bulletin of the Korean Chemical Society. 2006, 27(4), pp. 556-562
BibTex
@article{LopezSalido2006Exper-9499,
  year={2006},
  title={Experimental Studies on Plasmon Resonance of Ag Nanoparticles on Highly Ordered Pyrolytic Graphite (HOPG)},
  number={4},
  volume={27},
  journal={Bulletin of the Korean Chemical Society},
  pages={556--562},
  author={Lopez-Salido, Ignacio and Bertram, Nils and Lim, Dong Chan and Ganteför, Gerd and Kim, Young Dok}
}
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