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Quantitative determination of a model organic/insulator/metal interface structure

DOI: 10.1039/C8NR06387G DOI Help

Authors: Martin Schwarz (Technical University of Munich) , David A. Duncan (Diamond Light Source) , Manuela Garnica (Technical University of Munich) , Jacob Ducke (Technical University of Munich) , Peter S. Deimel (Technical University of Munich) , Pardeep K. Thakur (Diamond Light Source) , Tien-lin Lee (Diamond Light Source) , Francesco Allegretti (Technical University of Munich) , Willi Auwärter (Technical University of Munich)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Nanoscale , VOL 28

State: Published (Approved)
Published: November 2018
Diamond Proposal Number(s): 14624

Open Access Open Access

Abstract: By combining X-ray photoelectron spectroscopy, X-ray standing waves and scanning tunneling microscopy, we investigate the geometric and electronic structure of a prototypical organic/insulator/metal interface, namely cobalt porphine on monolayer hexagonal boron nitride (h-BN) on Cu(111). Specifically, we determine the adsorption height of the organic molecule and show that the original planar molecular conformation is preserved in contrast to the adsorption on Cu(111). In addition, we highlight the electronic decoupling provided by the h-BN spacer layer and find that the h-BN–metal separation is not significantly modified by the molecular adsorption. Finally, we find indication of a temperature dependence of the adsorption height, which might be a signature of strongly-anisotropic thermal vibrations of the weakly bonded molecules.

Subject Areas: Physics, Materials


Instruments: I09-Surface and Interface Structural Analysis

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c8nr06387g.pdf