Intermolecular contrast in atomic force microscopy images without intermolecular bonds.

Autor:	Hämäläinen SK; Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, 00076 Aalto, Finland., van der Heijden N; Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, P.O. Box 80000, 3508 TA Utrecht, The Netherlands., van der Lit J; Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, P.O. Box 80000, 3508 TA Utrecht, The Netherlands., den Hartog S; Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, P.O. Box 80000, 3508 TA Utrecht, The Netherlands., Liljeroth P; Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, 00076 Aalto, Finland., Swart I; Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, P.O. Box 80000, 3508 TA Utrecht, The Netherlands.
Jazyk:	angličtina
Zdroj:	Physical review letters [Phys Rev Lett] 2014 Oct 31; Vol. 113 (18), pp. 186102. Date of Electronic Publication: 2014 Oct 31.
DOI:	10.1103/PhysRevLett.113.186102
Abstrakt:	Intermolecular features in atomic force microscopy images of organic molecules have been ascribed to intermolecular bonds. A recent theoretical study [P. Hapala et al., Phys. Rev. B 90, 085421 (2014)] showed that these features can also be explained by the flexibility of molecule-terminated tips. We probe this effect by carrying out atomic force microscopy experiments on a model system that contains regions where intermolecular bonds should and should not exist between close-by molecules. Intermolecular features are observed in both regions, demonstrating that intermolecular contrast cannot be directly interpreted as intermolecular bonds.
Databáze:	MEDLINE
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