Preparation of monolayers of [Mn-III Cr-6(III)](3+) single-molecule magnets on HOPG, mica and silicon surfaces and characterization by means of non-contact AFM

Autor(en): Gryzia, Aaron
Predatsch, Hans
Brechling, Armin
Hoeke, Veronika
Krickemeyer, Erich
Derks, Christine
Neumann, Manfred
Glaser, Thorsten
Heinzmann, Ulrich
Stichwörter: COMPLEX; Materials Science; Materials Science, Multidisciplinary; Nanoscience & Nanotechnology; Physics; Physics, Applied; Science & Technology - Other Topics; SPIN GROUND-STATE
Erscheinungsdatum: 2011
Herausgeber: SPRINGER
Volumen: 6
We report on the characterization of various salts of [(Mn6CrIII)-Cr-III](3+) complexes prepared on substrates such as highly oriented pyrolytic graphite (HOPG), mica, SiO2, and Si3N4. [(Mn6CrIII)-Cr-III](3+) is a single-molecule magnet, i.e., a superparamagnetic molecule, with a blocking temperature around 2 K. The three positive charges of [(Mn6CrIII)-Cr-III](3+) were electrically neutralized by use of various anions such as tetraphenylborate (BPh4-), lactate (C3H5O3-), or perchlorate (ClO4-). The molecule was prepared on the substrates out of solution using the droplet technique. The main subject of investigation was how the anions and substrates influence the emerging surface topology during and after the preparation. Regarding HOPG and SiO2, flat island-like and hemispheric-shaped structures were created. We observed a strong correlation between the electronic properties of the substrate and the analyzed structures, especially in the case of mica where we observed a gradient in the analyzed structures across the surface.
ISSN: 1556276X
DOI: 10.1186/1556-276X-6-486

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