Controlling Electrical Conductance through a π‐Conjugated Cruciform Molecule by Selective Anchoring to Gold Electrodes |
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| Authors: | Cancan Huang Dr. Songjie Chen Kristian Baruël Ørnsø David Reber Masoud Baghernejad Dr. Yongchun Fu Prof. Thomas Wandlowski Prof. Silvio Decurtins Dr. Wenjing Hong Prof. Kristian Sommer Thygesen Dr. Shi‐Xia Liu |
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| Affiliation: | 1. Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern (Switzerland);2. Center for Atomic‐scale Materials Design (CAMD), Department of Physics, Technical University of Denmark, Fysikvej, 2800 Kgs. Lyngby (Denmark) |
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| Abstract: | Tuning charge transport at the single‐molecule level plays a crucial role in the construction of molecular electronic devices. Introduced herein is a promising and operationally simple approach to tune two distinct charge‐transport pathways through a cruciform molecule. Upon in situ cleavage of triisopropylsilyl groups, complete conversion from one junction type to another is achieved with a conductance increase by more than one order of magnitude, and it is consistent with predictions from ab initio transport calculations. Although molecules are well known to conduct through different orbitals (either HOMO or LUMO), the present study represents the first experimental realization of switching between HOMO‐ and LUMO‐dominated transport within the same molecule. |
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| Keywords: | ab initio calculations conducting materials gold molecular electronics single‐molecule studies |
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