Chiroptical activity in colloidal quantum dots coated with achiral ligands
| Autor: | Diana Savateeva, Alexander O. Govorov, Yury P. Rakovich, Nikolai Gaponik, Dzmitry Melnikau |
|---|---|
| Přispěvatelé: | Ministerio de Economía y Competitividad (España) |
| Rok vydání: | 2016 |
| Předmět: |
Circular dichroism
Materials science business.industry Nanoparticle Nanotechnology 02 engineering and technology Crystal structure Dichroism 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Nanomaterials Crystallography Optics Nanocrystal Quantum dot Monolayer 0210 nano-technology business |
| Zdroj: | Digital.CSIC: Repositorio Institucional del CSIC Consejo Superior de Investigaciones Científicas (CSIC) Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 2013-4118 |
| DOI: | 10.1364/OE.24.000A65 |
| Popis: | We studied the chiroptical properties of colloidal solution of CdSe and CdSe/ZnS quantum dots (QDs) with a cubic lattice structure which were initially prepared without use of any chiral molecules and coated with achiral ligands. We demonstrate circular dichroism (CD) activity around first and second excitonic transition of these CdSe based nanocrystals. We consider that this chiroptical activity is caused by imbalance in racemic mixtures of QDs between the left and right handed nanoparticles, which appears as a result of the formation of various defects or incorporation of impurities into crystallographic structure during their synthesis. We demonstrate that optical activity of colloidal solution of CdSe QDs with achiral ligands weakly depends on the QDs size and number of ZnS monolayers, but does not depend on the nature of achiral ligands or polarity of the solution. Project FIS2013-41184-P of the Spanish Minsitry of Economy and Competitiveness MINECO. |
| Databáze: | OpenAIRE |
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