Science Advances

Supplementary Materials

This PDF file includes:

  • section S1. Synthesis
  • section S2. Grafting and characterization of modified HOPG
  • section S3. Conductance measurements—Additional data
  • section S4. Conductance calculations—Additional data and discussion
  • scheme S1. Synthetic route of 3,5-dimethyl-4-nitrobenzenediazonium
    tetrafluoroborate salt.
  • fig. S1. 1H NMR spectrum of 1-amino-3,5-dimethyl-4-nitrobenzene (500 MHz,
  • fig. S2. 1H NMR spectrum of 3,5-dimethyl-4-nitrobenzenediazonium
    tetrafluoroborate salt (500 MHz, DMSO-d6).
  • fig. S3. Grafting on HOPG.
  • fig. S4. Characterization of modified HOPG surface.
  • fig. S5. Dendrimeric structures.
  • fig. S6. Blank experiment in argon.
  • fig. S7. Blank experiment in 1,2,4-trichlorobenzene.
  • fig. S8. Individual conductance traces.
  • fig. S9. Geometries of grafted DMAB molecules.
  • fig. S10. Transmission of different DMAB structures.
  • fig. S11. Transmission of AB, DMAB, and PPD.
  • fig. S12. Structures of PPD junctions.
  • References (48–55)

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