Tunable quantum dot arrays formed from self-assembled metal-organic networks

The confinement of Ag(111) surface-state electrons by self-assembled, nanoporous metal-organic networks is studied using low-temperature scanning tunneling microscopy and spectroscopy as well as electronic structure calculations. The honeycomb networks of Co metal centers and dicarbonitrile-oligophe...

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Veröffentlicht in:Physical review letters 2011-01, Vol.106 (2), p.026802-026802, Article 026802
Hauptverfasser: Klappenberger, F, Kühne, D, Krenner, W, Silanes, I, Arnau, A, García de Abajo, F J, Klyatskaya, S, Ruben, M, Barth, J V
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Sprache:eng
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Zusammenfassung:The confinement of Ag(111) surface-state electrons by self-assembled, nanoporous metal-organic networks is studied using low-temperature scanning tunneling microscopy and spectroscopy as well as electronic structure calculations. The honeycomb networks of Co metal centers and dicarbonitrile-oligophenyl linkers induce surface resonance states confined in the cavities with a tunable energy level alignment. We find that electron scattering is repulsive on the molecules and weakly attractive on Co. The tailored networks represent periodic arrays of uniform and coupled quantum dots.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.106.026802