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- Arroyo, C.R., et al.
(författare)
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Quantum interference effects at room temperature in OPV-based single-molecule junctions
- 2013
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Ingår i: Nanoscale Research Letters. - 1556-276X .- 1931-7573. ; 8:1
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Tidskriftsartikel (refereegranskat)abstract
- 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.
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