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000014605 041__ $$aeng
000014605 082__ $$a530
000014605 084__ $$2WoS$$aNanoscience & Nanotechnology
000014605 084__ $$2WoS$$aMaterials Science, Multidisciplinary
000014605 084__ $$2WoS$$aPhysics, Applied
000014605 1001_ $$0P:(DE-Juel1)130583$$aCaciuc, V.$$b0$$uFZJ
000014605 245__ $$aFine tuning of the electronic structure of n-conjugated molecules for molecular electronics
000014605 260__ $$aBristol$$bIOP Publ.$$c2011
000014605 300__ $$a145701
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000014605 440_0 $$04475$$aNanotechnology$$v22$$x0957-4484$$y14
000014605 500__ $$3POF3_Assignment on 2016-02-29
000014605 500__ $$aThe computations were performed under the auspices of the VSR at the computer JUROPA and the Gauss Centre for Supercomputing at the high-performance computer JUGENE operated by the Julich Supercomputer Centre at the Forschungszentrum Julich. This work was financially supported by the DFG (grant SPP1243). The authors thank P Lazic for helpful discussions.
000014605 520__ $$aMolecular components with their inherent scalability are expected to be promising supplements for nanoscale electronic devices. Here we report on how to specifically tune the electronic structure of chemisorbed molecules and thus to gain control of molecular transport properties. The electronic structure of our prototype π-conjugated carboxylic acid anchored on the Cu(110) surface is modified systematically by inserting nitrogen atoms in a six-membered aromatic ring, a carboxylic functional group at the aromatic ring or both. Depending on the specific nature of the substituent, the relative position of the occupied or unoccupied electronic states with respect to the Fermi level can be specifically controlled and thus the transport properties of the studied molecular systems are modified intentionally, as proven by our scanning tunneling spectroscopy measurements. On the basis of the insight gained by our systematic experiment and first-principles calculations we are also able to predict the specific molecular character (σ or π) of the orbitals involved in the transport process of a carboxylate-Cu(110) system, depending on the functionalization pattern employed.
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000014605 7001_ $$0P:(DE-Juel1)VDB97762$$aLennartz, M .C.$$b1$$uFZJ
000014605 7001_ $$0P:(DE-Juel1)130513$$aAtodiresei, N.$$b2$$uFZJ
000014605 7001_ $$0P:(DE-Juel1)130751$$aKarthäuser, S.$$b3$$uFZJ
000014605 7001_ $$0P:(DE-Juel1)130548$$aBlügel, S.$$b4$$uFZJ
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000014605 8567_ $$uhttp://dx.doi.org/10.1088/0957-4484/22/14/145701
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