CdTe Nanocrystals: Synthesis, Optical Characterization, and Pseudopotential Calculation of the Band Gap
| Autor: | T. Stirner, N. T. Kirkman, J.E. Nicholls, L. May, Colin Ellis, J. H. C. Hogg, Mary O'Neill, Stephen Malcolm Kelly |
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| Rok vydání: | 2001 |
| Předmět: |
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Molecular Materials science Absorption spectroscopy Band gap Exciton Molecular Conformation Biomedical Engineering Bioengineering Molecular physics Spectral line Pseudopotential Condensed Matter::Materials Science Cadmium Compounds Electrochemistry Nanotechnology Computer Simulation General Materials Science Absorption (electromagnetic radiation) Condensed matter physics Condensed Matter::Other Water General Chemistry Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Energy Transfer Nanocrystal Spectrophotometry Tellurium Crystallization Powder Diffraction Powder diffraction |
| Zdroj: | Journal of Nanoscience and Nanotechnology. 1:451-455 |
| ISSN: | 1533-4880 |
| DOI: | 10.1166/jnn.2001.053 |
| Popis: | CdTe nanocrystals were synthesized in aqueous solution using 1-thioglycerol and 2-mercaptoethanol as surface stabilizers. The nanocrystals were characterized by means of X-ray powder diffraction and UV-vis absorption measurements. The UV-vis absorption spectra exhibit two distinct transition lines. Comparison of the experimental measurements with the results of the empirical pseudopotential calculations of the CdTe nanocrystals showed that the lower energy absorption line can be assigned to the heavy-hole exciton transition, whereas the higher energy absorption line can be attributed to the light-hole exciton transition. |
| Databáze: | OpenAIRE |
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