Rights statement: This is the peer reviewed version of the following article: L. J. O'Driscoll, X. Wang, M. Jay, A. S. Batsanov, H. Sadeghi, C. J. Lambert, B. J. Robinson, M. R. Bryce, Angew. Chem. Int. Ed. 2020, 59, 882 which has been published in final form at https://onlinelibrary.wiley.com/doi/full/10.1002/anie.201911652 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Accepted author manuscript, 852 KB, PDF document
Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License
Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Carbazole‐Based Tetrapodal Anchor Groups for Gold Surfaces
T2 - Synthesis and Conductance Properties
AU - O'Driscoll, Luke J.
AU - Wang, Xintai
AU - Jay, Michael
AU - Batsanov, Andrei S.
AU - Sadeghi, Hatef
AU - Lambert, Colin
AU - Robinson, Benjamin
AU - Bryce, Martin R.
N1 - This is the peer reviewed version of the following article: L. J. O'Driscoll, X. Wang, M. Jay, A. S. Batsanov, H. Sadeghi, C. J. Lambert, B. J. Robinson, M. R. Bryce, Angew. Chem. Int. Ed. 2020, 59, 882 which has been published in final form at https://onlinelibrary.wiley.com/doi/full/10.1002/anie.201911652 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
PY - 2020/1/7
Y1 - 2020/1/7
N2 - As the field of molecular‐scale electronics matures and the prospect of devices incorporating molecular wires becomes more feasible, it is necessary to progress from the simple anchor groups used in fundamental conductance studies to more elaborate anchors designed with device stability in mind. This study presents a series of oligo(phenylene‐ethynylene) wires with one tetrapodal anchor and a phenyl or pyridyl head group. The new anchors are designed to bind strongly to gold surfaces without disrupting the conductance pathway of the wires. Conductive probe atomic force microscopy (cAFM) was used to determine the conductance of self‐assembled monolayers (SAMs) of the wires in Au–SAM–Pt and Au–SAM–graphene junctions, from which the conductance per molecule was derived. For tolane‐type wires, mean conductances per molecule of up to 10−4.37 G0 (Pt) and 10−3.78 G0 (graphene) were measured, despite limited electronic coupling to the Au electrode, demonstrating the potential of this approach. Computational studies of the surface binding geometry and transport properties rationalise and support the experimental results.
AB - As the field of molecular‐scale electronics matures and the prospect of devices incorporating molecular wires becomes more feasible, it is necessary to progress from the simple anchor groups used in fundamental conductance studies to more elaborate anchors designed with device stability in mind. This study presents a series of oligo(phenylene‐ethynylene) wires with one tetrapodal anchor and a phenyl or pyridyl head group. The new anchors are designed to bind strongly to gold surfaces without disrupting the conductance pathway of the wires. Conductive probe atomic force microscopy (cAFM) was used to determine the conductance of self‐assembled monolayers (SAMs) of the wires in Au–SAM–Pt and Au–SAM–graphene junctions, from which the conductance per molecule was derived. For tolane‐type wires, mean conductances per molecule of up to 10−4.37 G0 (Pt) and 10−3.78 G0 (graphene) were measured, despite limited electronic coupling to the Au electrode, demonstrating the potential of this approach. Computational studies of the surface binding geometry and transport properties rationalise and support the experimental results.
KW - DFT calculations
KW - molecular electronics
KW - monolayers
KW - oligo(phenylene-ethynylene)
KW - scanning probe microscopy
U2 - 10.1002/anie.201911652
DO - 10.1002/anie.201911652
M3 - Journal article
VL - 59
SP - 882
EP - 889
JO - Angewandte Chemie
JF - Angewandte Chemie
SN - 0044-8249
IS - 2
ER -