Templated self-assembly and local doping of molecules on epitaxial hexagonal boron nitride.

Autor: Schulz F; Department of Applied Physics, Aalto University School of Science , P.O. Box 15100, 00076 Aalto, Finland., Drost R, Hämäläinen SK, Liljeroth P
Jazyk: angličtina
Zdroj: ACS nano [ACS Nano] 2013 Dec 23; Vol. 7 (12), pp. 11121-8. Date of Electronic Publication: 2013 Oct 25.
DOI: 10.1021/nn404840h
Abstrakt: Using low-temperature scanning tunneling microscopy, we show that monolayer hexagonal boron nitride (h-BN) on Ir(111) acts as ultrathin insulating layer for organic molecules, while simultaneously templating their self-assembly. Tunneling spectroscopy experiments on cobalt phthalocyanine (CoPC) reveal narrow molecular resonances and indicate that the charge state of CoPC is periodically modulated by the h-BN moiré superstructure. Molecules in the second layer show site-selective adsorption behavior, allowing the synthesis of molecular dimers that are spatially ordered and inaccessible by usual chemical means.
Databáze: MEDLINE