Electron Transport and a Rectifying Effect of Oligourea Foldamer Films Entrapped within Nanoscale Junctions
| Autor: | Slawomir Sek, Anna K. Puszko, Karolina Pulka-Ziach, Joanna Juhaniewicz-Dębińska |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Foldamer Conductance 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Electron transport chain 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Rectification Chemical physics Molecule Physical and Theoretical Chemistry Exponential decay 0210 nano-technology Protein secondary structure Nanoscopic scale |
| Zdroj: | The Journal of Physical Chemistry C. 123:1136-1141 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.8b11046 |
| Popis: | α-Helicomimetic oligoureas are a class of compounds with a broad spectrum of applications, yet their use in materials science remains still unexplored. In this work, we have synthesized three oligomers composed of 8–12 residues and studied their electron transport characteristic. We have found that the conductance of oligoureas depends on the length of the molecule. The distance dependence yields a low value of the decay constant, which indicates that the dominant mechanism is hopping. Moreover, we describe here an entirely new property of oligoureas, that is, directional dependence of electron transport. The latter is manifested on current–voltage characteristic as current rectification. The highest rectification ratio observed was ≈12, which is around 3 times greater than that observed for helical peptides of similar length. This effect demonstrates that carefully designed oligomers with a well-defined secondary structure (e.g., oligourea foldamers) may be considered as potential candidates for use in n... |
| Databáze: | OpenAIRE |
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