First Step in Chemical Preparation of Metal Nanogaps Bridged by Thiol End-Capped Molecular Wires
| Autor: | Thomas Bjørnholm, Kasper Moth-Poulsen, Mikael Bols, Titoo Jain, Erling Thyrhaug, Asger B. Petersen, Niels Harrit, Kristine Kilsaa |
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| Rok vydání: | 2010 |
| Předmět: |
Aqueous solution
Chemistry Supramolecular chemistry Nucleation 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Molecular wire Polymer chemistry Materials Chemistry Organic chemistry Molecule Nanorod Physical and Theoretical Chemistry 0210 nano-technology Stoichiometry Equilibrium constant |
| Zdroj: | The Journal of Physical Chemistry B. 114:11771-11777 |
| ISSN: | 1520-5207 1520-6106 |
| DOI: | 10.1021/jp105948v |
| Popis: | We present a strategy for chemical preparation of multiple copies of single-molecule electronic devices that is based on chemical self-assembly under equilibrium conditions in aqueous solution. As a first step in the realization of this, we show that thiol end-capped oligo(phenylenevinylene)s (OPVs) can be rendered water-soluble by forming well-defined stoichiometric supramolecular complexes with α-cyclodextrins. On the basis of fluorescence intensity measurements in water, a 1:3 stoichiometry was determined for the complexes with equilibrium constants of the order of 5 × 10(-2) M(-2). The photophysical properties of the OPV3s as free molecules in solution, as nanoaggregates in aqueous suspension, and embedded in cyclodextrins in water, are reported, and the prospects of using these complexes as nucleation sites for growth of gold nanorods bridged by electronically active thiol end-capped molecules is discussed. |
| Databáze: | OpenAIRE |
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