Scaling Up Nanoplasmon Catalysis: The Role of Heat Dissipation
| Autor: | Wouter Koopman, Joachim Koetz, Jan Pudell, Matias Bargheer, Radwan M. Sarhan, Clemens N. Z. Schmitt, Felix Stete, Ferenc Liebig, M. Rössle, Marc Herzog |
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| Rok vydání: | 2019 |
| Předmět: |
Plasmonic nanoparticles
Physics::Optics 02 engineering and technology Electron 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials symbols.namesake General Energy Chemical physics symbols Physical and Theoretical Chemistry Surface plasmon resonance 0210 nano-technology Scaling Nanoscopic scale Raman scattering Excitation Plasmon |
| Zdroj: | The Journal of Physical Chemistry C. 123:9352-9357 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.8b12574 |
| Popis: | Nanoscale heating by optical excitation of plasmonic nanoparticles offers a new perspective of controlling chemical reactions, where heat is not spatially uniform as in conventional macroscopic heating but strong temperature gradients exist around microscopic hot spots. In nanoplasmonics, metal particles act as a nanosource of light, heat, and energetic electrons driven by resonant excitation of their localized surface plasmon resonance. As an example of the coupling reaction of 4-nitrothiophenol into 4,4′-dimercaptoazobenzene, we show that besides the nanoscopic heat distribution at hot spots, the microscopic distribution of heat dictated by the spot size of the light focus also plays a crucial role in the design of plasmonic nanoreactors. Small sizes of laser spots enable high intensities to drive plasmon-assisted catalysis. This facilitates the observation of such reactions by surface-enhanced Raman scattering, but it challenges attempts to scale nanoplasmonic chemistry up to large areas, where the exc... |
| Databáze: | OpenAIRE |
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