Optical properties of colloidal nanocrystal spheres and tetrapods
| Autor: | M. De Giorgi, Liberato Manna, Davide Tarì, Roman Krahne, R. Cingolani |
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| Přispěvatelé: | M., DE GIORGI, D., Tari', L., Manna, R., Krahne, Cingolani, Roberto |
| Rok vydání: | 2005 |
| Předmět: |
Materials science
Photoluminescence business.industry General Engineering Physics::Optics Electronic structure Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Molecular physics Crystal Condensed Matter::Materials Science symbols.namesake Optics tetrapod nanocrystal Nanocrystal Quantum dot dot nanocrystal Stokes shift symbols stoke shift business Spectroscopy Absorption (electromagnetic radiation) |
| Zdroj: | Microelectronics Journal. 36:552-554 |
| ISSN: | 0026-2692 |
| Popis: | We study the electronic structure of CdTe spheres (dots) and tetrapods by absorption, fluorescence, and photoluminescence-excitation (PLE) spectroscopy. A series of quantum dots with different diameter and tetrapods with varying arm length and diameter is investigated in solution at room temperature. We observe a significant impact of the geometrical shape of the nanocrystals on the optical response. In particular we find a double peak in the emission of tetrapods as a characteristic feature of this nanocrystal geometry. We observe a pronounced Stokes shift for the tetrapod and dot samples which depends sensitively on the crystal size. (c) 2005 Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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