Journal
LANGMUIR
Volume 27, Issue 18, Pages 11508-11513Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la202346r
Keywords
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Funding
- Dutch nanotechnology network [TPC 6939]
- Dutch Science Council of the Chemical Sciences [700.57.401]
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Specific (host guest) and unspecific (substrate guest) interactions, between self-assembled monolayers of cucurbit[7]uril (CB[7]) on gold, (Au) substrates and neutral adamantyl (Ad) guests were resolved by studying these, interactions at the single molecule level using dynamic force spectroscopy. The dissociation rate constants of the Ad-Au and the Ad-CB[7] interactions were 0.3 s(-1) and 0.03 s(-1), respectively, indicating that the specific binding is more stable. The probability of observing a specific interaction (40 +/- 9%) is similar to the reported surface coverages of CB[7] monolayers on Au substrates. The higher strength and stability of the Ad-CB[7] interactions explains why, although presenting an imperfect coverage, CB[n] monolayers can be used successfully as a platform for surface immobilization.
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