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Mapping the force field of a hydrogen-bonded assembly

Author

Listed:
  • A. M. Sweetman

    (School of Physics & Astronomy, University of Nottingham)

  • S. P. Jarvis

    (School of Physics & Astronomy, University of Nottingham)

  • Hongqian Sang

    (School of Physics and Technology, Centre for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University
    King’s College London, The Strand)

  • I. Lekkas

    (School of Physics & Astronomy, University of Nottingham)

  • P. Rahe

    (University of Utah)

  • Yu Wang

    (School of Physics and Technology, Centre for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University)

  • Jianbo Wang

    (School of Physics and Technology, Centre for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University)

  • N.R. Champness

    (School of Chemistry, University of Nottingham)

  • L. Kantorovich

    (King’s College London, The Strand)

  • P. Moriarty

    (School of Physics & Astronomy, University of Nottingham)

Abstract

Hydrogen bonding underpins the properties of a vast array of systems spanning a wide variety of scientific fields. From the elegance of base pair interactions in DNA to the symmetry of extended supramolecular assemblies, hydrogen bonds play an essential role in directing intermolecular forces. Yet fundamental aspects of the hydrogen bond continue to be vigorously debated. Here we use dynamic force microscopy (DFM) to quantitatively map the tip-sample force field for naphthalene tetracarboxylic diimide molecules hydrogen-bonded in two-dimensional assemblies. A comparison of experimental images and force spectra with their simulated counterparts shows that intermolecular contrast arises from repulsive tip-sample interactions whose interpretation can be aided via an examination of charge density depletion across the molecular system. Interpreting DFM images of hydrogen-bonded systems therefore necessitates detailed consideration of the coupled tip-molecule system: analyses based on intermolecular charge density in the absence of the tip fail to capture the essential physical chemistry underpinning the imaging mechanism.

Suggested Citation

  • A. M. Sweetman & S. P. Jarvis & Hongqian Sang & I. Lekkas & P. Rahe & Yu Wang & Jianbo Wang & N.R. Champness & L. Kantorovich & P. Moriarty, 2014. "Mapping the force field of a hydrogen-bonded assembly," Nature Communications, Nature, vol. 5(1), pages 1-7, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4931
    DOI: 10.1038/ncomms4931
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    Cited by:

    1. Alessandro Scirè & Valerio Annovazzi-Lodi, 2017. "Self-organization in a diversity induced thermodynamics," PLOS ONE, Public Library of Science, vol. 12(12), pages 1-15, December.
    2. Julian Stirling & Ioannis Lekkas & Adam Sweetman & Predrag Djuranovic & Quanmin Guo & Brian Pauw & Josef Granwehr & Raphaël Lévy & Philip Moriarty, 2014. "Critical Assessment of the Evidence for Striped Nanoparticles," PLOS ONE, Public Library of Science, vol. 9(11), pages 1-18, November.

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