Controlled placement of colloidal quantum dots in sub-15 nm clusters
| Autor: | Francesco Marsili, Tamar Mentzel, Darcy D. Wanger, David B. Strasfeld, Moungi G. Bawendi, Vitor R. Manfrinato, Hee-Sun Han, Karl K. Berggren, Jose Pablo Arrieta |
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| Přispěvatelé: | Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology. Department of Physics, Bawendi, Moungi, G., Manfrinato, Vitor Riseti, Wanger, Darcy Deborah, Strasfeld, David B., Han, Hee-Sun, Marsili, Francesco, Arrieta, Jose P., Mentzel, Tamar, Bawendi, Moungi G., Berggren, Karl K. |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Photoluminescence
Materials science Fabrication business.industry Mechanical Engineering Bioengineering Nanotechnology General Chemistry Optically active law.invention Solid-state lighting Mechanics of Materials law Cluster (physics) Optoelectronics General Materials Science Colloidal quantum dots Electrical and Electronic Engineering business Lithography |
| Zdroj: | Darcy Wanger |
| Popis: | We demonstrated a technique to control the placement of 6 nm-diameter CdSe and 5 nm-diameter CdSe/CdZnS colloidal quantum dots (QDs) through electron-beam lithography. This QD-placement technique resulted in an average of three QDs in each cluster, and 87% of the templated sites were occupied by at least one QD. These QD clusters could be in close proximity to one another, with a minimum separation of 12 nm. Photoluminescence measurements of the fabricated QD clusters showed intermittent photoluminescence, which indicates that the QDs were optically active after the fabrication process. This optimized top-down lithographic process is a step towards the integration of individual QDs in optoelectronic and nano-optical systems. Hertz Foundation (Fellowship) United States. Dept. of Energy. Office of Basic Energy Sciences (Award DE-SC0001088) |
| Databáze: | OpenAIRE |
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