Tuning the conductance of a molecular wire by the interplay of donor and acceptor units
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
We investigate the conductance of optimized donor-acceptor-donor molecular wires obtained by on-surface synthesis on the Au(111) surface. A careful balance between acceptors and donors is achieved using a diketopyrrolopyrrole acceptor and two thiophene donors per unit along the wire. Scanning tunneling microscopy imaging, spectroscopy, and conductance measurements done by pulling a single molecular wire at one end are presented. We show that the conductance of the obtained wires is among the highest reported so far in a tunneling transport regime, with an inverse decay length of 0.17 Å−1. Using complex band structure calculations, different donor and acceptor groups are discussed, showing how a balanced combination of donor and acceptor units along the wire can further minimize the decay of the tunneling current with length.
Details
Original language | English |
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Pages (from-to) | 17131-17139 |
Number of pages | 9 |
Journal | Nanoscale |
Volume | 10 |
Issue number | 36 |
Publication status | Published - 28 Sept 2018 |
Peer-reviewed | Yes |
External IDs
PubMed | 30182095 |
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ORCID | /0000-0001-9607-8715/work/142252625 |
ORCID | /0000-0002-4531-691X/work/148607612 |