Quantum interference effects at room temperature in OPV-based single-molecule junctions
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- Quantum interference effects at room temperature in OPV-based single-molecule junctions
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Interference effects on charge transport through an individual molecule can lead to a notable modulation and suppression on its conductance. In this letter, we report the observation of quantum interference effects occurring at room temperature in single-molecule junctions based on oligo(3)-phenylenevinylene (OPV3) derivatives, in which the central benzene ring is coupled to either para- or meta-positions. Using the break-junction technique, we find that the conductance for a single meta-OPV3 molecule wired between gold electrodes is one order of magnitude smaller than that of a para-OPV3 molecule. Theoretical calculations confirm the occurrence of constructive and destructive interference in the para- and meta-OPV3 molecules respectively, which arises from the phase difference of the transmission coefficients through the molecular orbitals.
Original language | English |
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Article number | 234 |
Journal | Nanoscale Research Letters |
Volume | 8 |
Number of pages | 6 |
ISSN | 1931-7573 |
DOIs | |
Publication status | Published - 2013 |
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