Abstract
In order to translate molecular properties in molecular-electronic devices, it is necessary to create design principles that can be used to achieve better structure-function control oriented toward device fabrication. In molecular tunneling junctions, cross-conjugation tends to give rise to destructive quantum interference effects that can be tuned by changing the electronic properties of the molecules. We performed a systematic study of the tunneling charge-transport properties of a series of compounds characterized by an identical cross-conjugated anthraquinoid molecular skeleton but bearing different substituents at the 9 and 10 positions that affect the energies and localization of their frontier orbitals. We compared the experimental results across three different experimental platforms in both single-molecule and large-area junctions and found a general agreement. Combined with theoretical models, these results separate the intrinsic properties of the molecules from platform-specific effects. This work is a step towards explicit synthetic control over tunneling charge transport targeted at specific functionality in (proto-) devices.
Original language | English |
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Pages (from-to) | 2018-2028 |
Number of pages | 11 |
Journal | Nanoscale advances |
Volume | 1 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1-May-2019 |
Keywords
- SELF-ASSEMBLED MONOLAYERS
- TUNNELING JUNCTIONS
- LARGE-AREA
- CROSS-CONJUGATION
- CONDUCTANCE
- TRANSPORT
- ELECTRONICS
- ROBUST
- EGAIN