Single Dot Spectroscopy of Two-Color Quantum Dot/Quantum Shell Nanostructures
| Autor: | Amy F. Grimes, Eva A. Dias, Douglas S. English, Patanjali Kambhampati |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Physics
Nanostructure Photoluminescence Condensed matter physics Shell (structure) Physics::Optics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Molecular physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Condensed Matter::Materials Science General Energy Quantum dot laser Quantum dot Physical and Theoretical Chemistry Diffusion (business) Spectroscopy Quantum |
| Zdroj: | The Journal of Physical Chemistry C. 112:14229-14232 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | Single dot spectroscopy is performed on two-color CdSe/ZnS/CdSe core/barrier/shell nanostructures. Unlike quantum dots cores, these systems have two phases with which to emit and ultimately examine for blinking analysis. These particles are brighter than conventional quantum dots and also show the photoluminescence (PL) intensity and energy fluctuations characteristic of quantum dots. Single dot spectral diffusion analysis yields no measureable energy shift correlation between the core and the shell on the 200 ms time scale. In contrast, the single dot PL from the CdSe shell has narrower linewidths than the CdSe core, indicating differences in its spectral diffusion on shorter timescales. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|