Tuning Energetic Levels in Nanocrystal Quantum Dots through Surface Manipulations
| Autor: | Assaf Aharoni, Dov Steiner, Uri Banin, Nir Yaacobi-Gross, Michal Soreni-Harari, Oded Millo, Nir Tessler |
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| Rok vydání: | 2008 |
| Předmět: |
Surface Properties
Polarity (physics) Scanning tunneling spectroscopy Bioengineering Nanotechnology Electronic structure Materials Testing Quantum Dots Molecule General Materials Science Particle Size Ligand Chemistry Mechanical Engineering Equipment Design General Chemistry Condensed Matter Physics Nanostructures Equipment Failure Analysis Energy Transfer Nanocrystal Chemical physics Quantum dot Vacuum level Crystallization |
| Zdroj: | Nano Letters. 8:678-684 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/nl0732171 |
| Popis: | We demonstrate tuning of the electronic level positions with respect to the vacuum level in colloidal InAs nanocrystals using surface ligand exchange. Electrochemical as well as scanning tunneling spectroscopy measurements reveal that the tuning is largely dependent on the nanocrystal size and the surface linking group, while the polarity of the ligand molecules has a lesser effect. The implications of affecting the electronic system of nanocrystal through its capping are illustrated through prototype devices. |
| Databáze: | OpenAIRE |
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