Probing the Hierarchy of Thymine–Thymine Interactions in Self-Assembled Structures by Manipulation with Scanning Tunneling Microscopy
| Autor: | Maya Schöck, Erik Lægsgaard, Lev Kantorovich, Flemming Besenbacher, Wei Xu, Ross E. A. Kelly, Ivan Stensgaard, Roberto Otero |
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| Rok vydání: | 2007 |
| Předmět: |
Hydrogen bond
Supramolecular chemistry General Chemistry Thymine law.invention Biomaterials chemistry.chemical_compound Crystallography Adsorption Models Chemical chemistry Microscopy Scanning Tunneling Chemical physics law Microscopy Molecule General Materials Science Self-assembly Scanning tunneling microscope Biotechnology |
| Zdroj: | Small. 3:2011-2014 |
| ISSN: | 1613-6829 1613-6810 |
| DOI: | 10.1002/smll.200700625 |
| Popis: | It is generally expect-ed that for such molecules with multifunctional groups a hi-erarchical self-assembly process exists.During this processdirectional bonds (e.g., hydrogen bonds) determine the for-mation of supramolecular structures in the first place (atlow surface coverages), while weaker interactions (e.g., vander Waals (vdW) interactions) become more important withincreasing surface coverage and then direct the subsequentself-assembly of the supramolecules formed initially.Forthis kind of experiment, scanning tunneling microscopy(STM) has proven to be the technique of choice since itallows a direct, real-space determination of the symmetryproperties of the molecular network as well as the unit-mesh distances and angles at the atomic scale.However, toobtain further insight into the detailed molecular structuresfrom the STM images, to address questions such as the mo-lecular adsorption conformations and to distinguish the dif-ferent interactions in self-assembled structures, comparisonwith advanced theoretical modeling of the STM images isrequired. |
| Databáze: | OpenAIRE |
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