ArticleBeilstein journal of nanotechnology2014
Modification of a single-molecule AFM probe with highly defined surface functionality.
Article in Beilstein journal of nanotechnology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- How Do We Know when Single-Molecule Force Spectroscopy Really Tests Single Bonds?Biophysical journal · 2018Review
- Advanced atomic force microscopy techniques III.Beilstein journal of nanotechnology · 2016Article
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Authors and funding
5 authors.
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Abstract
Single-molecule force spectroscopy with an atomic force microscope has been widely used to study inter- and intramolecular interactions. To obtain data consistent with single molecular events, a well-defined method is critical to limit the number of molecules at the apex of an AFM probe to one or to a few. In this paper, we demonstrate an easy method for single-molecule probe modification by using the Cu-catalyzed alkyne-azide cycloaddition reaction. Excess terminal alkynes were covalently attached to the probe, and a bi-functional molecule containing an azide at one end and a carboxylic acid at the other was dissolved in the reaction solution. By simply contacting the probe and the Cu substrate, controlled carboxylation on the probe apex could be achieved, since the 'click' reaction requires the co-exist of alkyne, azide and Cu(I). The finite contact area would result in a highly defined surface functionality of the probe down to single molecule level with high reproducibility.
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