Intermolecular contrast in atomic force microscopy images without intermolecular bonds

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2014
Major/Subject
Mcode
Degree programme
Language
en
Pages
1-5
Series
PHYSICAL REVIEW LETTERS, Volume 113
Abstract
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.
Description
Keywords
carbon monoxide (CO) -terminated tip, hydrogen bond, intermolecular contrast, non-contact atomic force microscopy (AFM)
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Citation
Hämäläinen, S, van der Heijden, N, van der Lit, J, den Hartog, S, Liljeroth, P & Swart, I 2014, ' Intermolecular contrast in atomic force microscopy images without intermolecular bonds ', Physical Review Letters, vol. 113, 186102, pp. 1-5 . https://doi.org/10.1103/PhysRevLett.113.186102