Electron transport and redox reactions in carbon-based molecular electronic junctions

A unique molecular junction design is described, consisting of a molecular mono- or multilayer oriented between a conducting carbon substrate and a metallic top contact

Richard L. McCreery

2006

Scholarcy highlights

  • A unique molecular junction design is described, consisting of a molecular mono- or multilayer oriented between a conducting carbon substrate and a metallic top contact
  • Molecular junctions were completed by electron-beam deposition of copper, titanium oxide, or aluminium oxide followed by a final conducting layer of gold
  • The resistance of PPF/molecule/Cu/Au junctions exhibited a strong dependence on the structure and thickness of the molecular layer, ranging from 0.13 Ω cm for a nitrobiphenyl monolayer, to 4.46 Ω cm for a biphenyl monolayer, and 160 Ω cm for a 4.3 nm thick nitrobiphenyl multilayer
  • In situRaman spectroscopy of PPF/nitroazobenzene/AlOx/Au junctions with partially transparent metal contacts revealed that redox reactions occurred under bias, with nitroazobenzene reduction occurring when the PPF was biased negative relative to the Au
  • Reproduced material should be attributed as follows: For reproduction of material from NJC: - Reproduced by permission of The Royal Society of Chemistry on behalf of the Centre National de la Recherche Scientifique and the RSC
  • For reproduction of material from all other RSC journals: - Reproduced by permission of The Royal Society of Chemistry

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