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Defect-Tolerant Aligned Dipoles within Two-Dimensional Plastic Lattices.

ACS nano (2015-04-14)
John C Thomas, Jeffrey J Schwartz, J Nathan Hohman, Shelley A Claridge, Harsharn S Auluck, Andrew C Serino, Alexander M Spokoyny, Giang Tran, Kevin F Kelly, Chad A Mirkin, Jerome Gilles, Stanley J Osher, Paul S Weiss
ZUSAMMENFASSUNG

Carboranethiol molecules self-assemble into upright molecular monolayers on Au{111} with aligned dipoles in two dimensions. The positions and offsets of each molecule's geometric apex and local dipole moment are measured and correlated with sub-Ångström precision. Juxtaposing simultaneously acquired images, we observe monodirectional offsets between the molecular apexes and dipole extrema. We determine dipole orientations using efficient new image analysis techniques and find aligned dipoles to be highly defect tolerant, crossing molecular domain boundaries and substrate step edges. The alignment observed, consistent with Monte Carlo simulations, forms through favorable intermolecular dipole-dipole interactions.

MATERIALIEN
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Produktbeschreibung

Sigma-Aldrich
Benzol, anhydrous, 99.8%
Sigma-Aldrich
4,5-Dihydroxy-anthrachinon-2-carbonsäure, technical grade
Sigma-Aldrich
4,5-Dihydroxy-anthrachinon-2-carbonsäure