Abstract:
:The ability to understand and control the electronic properties of individual molecules in a device environment is crucial for developing future technologies at the nanometre scale and below. Achieving this, however, requires the creation of three-terminal devices that allow single molecules to be both gated and imaged at the atomic scale. We have accomplished this by integrating a graphene field effect transistor with a scanning tunnelling microscope, thus allowing gate-controlled charging and spectroscopic interrogation of individual tetrafluoro-tetracyanoquinodimethane molecules. We observe a non-rigid shift in the molecule's lowest unoccupied molecular orbital energy (relative to the Dirac point) as a function of gate voltage due to graphene polarization effects. Our results show that electron-electron interactions play an important role in how molecular energy levels align to the graphene Dirac point, and may significantly influence charge transport through individual molecules incorporated in graphene-based nanodevices.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Wickenburg S,Lu J,Lischner J,Tsai HZ,Omrani AA,Riss A,Karrasch C,Bradley A,Jung HS,Khajeh R,Wong D,Watanabe K,Taniguchi T,Zettl A,Neto AHC,Louie SG,Crommie MFdoi
10.1038/ncomms13553subject
Has Abstractpub_date
2016-11-25 00:00:00pages
13553issn
2041-1723pii
ncomms13553journal_volume
7pub_type
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