Comparative Investigation of Energy Relaxation Dynamics of Gold Nanoparticles and Gold−Polypyrrole Encapsulated Nanoparticles
| Autor: | Jae-Suk Lee, Hyun Jong Shin, Young Nam Hwang, In Wook Hwang, Dongho Kim, Gyoujin Cho, Seon Hee Han |
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| Rok vydání: | 2003 |
| Předmět: |
Materials science
business.industry Surface plasmon Physics::Optics Nanoparticle Nanotechnology Polypyrrole Surfaces Coatings and Films Photoexcitation chemistry.chemical_compound chemistry Colloidal gold Femtosecond Ultrafast laser spectroscopy Materials Chemistry Physical and Theoretical Chemistry business Thermal energy |
| Zdroj: | The Journal of Physical Chemistry B. 107:4699-4704 |
| ISSN: | 1520-5207 1520-6106 |
| DOI: | 10.1021/jp022055o |
| Popis: | We report the femtosecond transient absorption dynamics of the gold and gold−polypyrrole nanoparticles by photoexcitation at various wavelengths. The bleach recovery dynamics of the surface plasmon band for the gold and gold−polypyrrole nanoparticles exhibit different responses to the pump beam energy and intensity in thermal energy transfer from the gold nanoparticles to the surrounding medium or embedding material. This indicates that directly attached polypyrroles provide fast thermal energy transfer pathways for the core gold nanoparticles. |
| Databáze: | OpenAIRE |
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