Langmuir · 1997 · 54 citations · 21 references
Natural SciencesChemistryMaterials ScienceMaterials ChemistryPhysical ChemistrySurface ScienceAdsorption At InterfacesAtomic Force MicroscopyCrystallographyScanning Probe MicroscopySurface CrystallographySurface PhysicsAdsorbate - Surface InteractionsCalixarene MonolayersCalixarene RecognitionHexagonal LatticesLattice ConstantsMonolayersSelf-assembled MonolayersSurface Lattice Constants
The structure and orientation of calix[4]resorcinarene receptor adsorbate self-assembled monolayers (SAMs) on Au(111) were studied with atomic force microscopy (AFM). In molecularly-resolved images, two hexagonal periodicities with lattice constants of 11.6 ± 0.4 and 4.2 ± 0.2 Å, respectively, were observed. These two periodicities could be observed separately as well as simultaneously by changing the imaging force. The experimentally determined distances are assigned to different parts of the adsorbates; the 11.6 Å repeat distance is related to the lattice of the calix[4]resorcinarene recognition sites of the adsorbates, while the smaller repeat length fits well with the interchain distance of a closest packing of alkyl chains. These measurements confirm our previous assumption regarding the high degree of order of the calix[4]resorcinarene SAMs on gold.
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Forces in atomic force microscopy in air and water
A. L. Weisenhorn, Paul K. Hansma, T. R. Albrecht et al. · Applied Physics Letters · 1989 · 631 citations
Self-Assembly of <i>n</i> -Alkyl Thiols as Disulfides on Au(111)
Paul Fenter, A. Eberhardt, P. Eisenberger · Science · 1994 · 557 citations