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. 2015 Feb 10;5:8350. doi: 10.1038/srep08350

Figure 5. Representation of the conduction mechanism, through the molecule, for the sample–molecule–tip system on Cu3Au surfaces.

Figure 5

(a) Energy diagram without applied bias voltage for the Co-TPP and H2-TPP molecules. (b–c) Complementary rectification effect due to HOMO conduction for Co-TPP and LUMO conduction for H2-TPP. (d) The experimental I × V curve obtained for the molecules on Cu3Au(100).