π-Plasmon model for carbon nano structures: Application to porphyrin
| Autor: | Chu Thuy Anh, Le Minh Thanh, Dao Thu Ha, Do T. Nga, Nguyen Ai Viet, Tran Thi Thanh Van |
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| Rok vydání: | 2016 |
| Předmět: |
History
Materials science Absorption spectroscopy Band gap business.industry chemistry.chemical_element Nanotechnology 01 natural sciences Molecular physics Semimetal 010305 fluids & plasmas Computer Science Applications Education Semiconductor chemistry 0103 physical sciences Nano 010306 general physics business Absorption (electromagnetic radiation) Carbon Plasmon |
| Zdroj: | Journal of Physics: Conference Series. 726:012006 |
| ISSN: | 1742-6596 1742-6588 |
| DOI: | 10.1088/1742-6596/726/1/012006 |
| Popis: | In traditional concept, the optical properties of semiconductors and semimetals near their fundamental optical band gaps are attributed to single excitations (such electron-hole pairs, excitons...). In our earlier article, we proposed the collective mechanism of π-plasmons for optical properties of low dimensional carbon nano structures. A simple way to calculate the peak positions of UV-vis absorption spectra was pointed out and gave a good agreement with experimental data. In this work we analyze different schemas to calculate the UV-vis absorption peaks. A new parameter k which characterizes the dependence of schema on geometry and number of carbon sites is defined. As an example, the case of porphyrin was investigated. |
| Databáze: | OpenAIRE |
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