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Covalent Attachment of Single Molecules for AFM-based Force Spectroscopy
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Chemistry
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JoVE Journal Chemistry
Covalent Attachment of Single Molecules for AFM-based Force Spectroscopy

Covalent Attachment of Single Molecules for AFM-based Force Spectroscopy

DOI:
10.3791/60934-v

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10:37 min

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March 16, 2020

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, , , ,
1Institute of Physical Chemistry,Albert-Ludwigs-Universität Freiburg, 2Chair in Polymer Chemistry,Saarland University, 3Cluster of Excellence livMatS at FIT – Freiburg Center for Interactive Materials and Bioinspired Technologies,University of Freiburg

Chapters

  • 00:04Introduction
  • 00:52Surface Activation, Silanization, and PEGylation
  • 03:03Covalent Polymer Attachment
  • 04:21Determining the Inverse Optical Lever Sensitivity (InVOLS)
  • 06:13Determining the AFM Cantilever Force Constant
  • 07:06Data Collection
  • 08:10Results: Single-Molecule Stretching and Desorption
  • 09:44Conclusion

Summary

Automatic Translation

Automatic Translation

Covalent attachment of probe molecules to atomic force microscopy (AFM) cantilever tips is an essential technique for the investigation of their physical properties. This allows us to determine the stretching force, desorption force and length of polymers via AFM-based single molecule force spectroscopy with high reproducibility.

Tags

Keywords: Single Molecule Force SpectroscopyAFM-based Force SpectroscopyCovalent AttachmentPolymer BindingSilane-PEG-malPlasma ActivationToluenePEGPolystyrenePolynipamCapillary ForcesControl Samples

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