| Autor: |
Smerdon JA; Department of Physics, University of Liverpool, Liverpool L69 3BX, United Kingdom., Rankin RB, Greeley JP, Guisinger NP, Guest JR |
| Jazyk: |
angličtina |
| Zdroj: |
ACS nano [ACS Nano] 2013 Apr 23; Vol. 7 (4), pp. 3086-94. Date of Electronic Publication: 2013 Mar 21. |
| DOI: |
10.1021/nn304992c |
| Abstrakt: |
We demonstrate the self-assembly of C60 and pentacene (Pn) molecules into acceptor-donor heterostructures which are well-ordered and--despite the high degree of symmetry of the constituent molecules--chiral. Pn was deposited on Cu(111) to monolayer coverage, producing the random-tiling (R) phase as previously described. Atop R-phase Pn, postdeposited C60 molecules cause rearrangement of the Pn molecules into domains based on chiral supramolecular "pinwheels". These two molecules are the highest-symmetry achiral molecules so far observed to coalesce into chiral heterostructures. Also, the chiral pinwheels (composed of 1 C60 and 6 Pn each) may share Pn molecules in different ways to produce structures with different lattice parameters and degree of chirality. High-resolution scanning tunneling microscopy results and knowledge of adsorption sites allow the determination of these structures to a high degree of confidence. The measurement of chiral angles identical to those predicted is a further demonstration of the accuracy of the models. van der Waals density functional theory calculations reveal that the Pn molecules around each C60 are torsionally flexed around their long molecular axes and that there is charge transfer from C60 to Pn in each pinwheel. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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