The role of carbon nanotube forest density in thermionic emission
| Autor: | Kais Dridi, Kevin Voon, Mokter Mahmud Chowdhury, Alireza Nojeh, Mike Chang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Incandescent light bulb
Work (thermodynamics) Materials science business.industry Analytical chemistry Thermionic emission 02 engineering and technology Carbon nanotube Chemical vapor deposition 010402 general chemistry 021001 nanoscience & nanotechnology Laser 01 natural sciences 0104 chemical sciences law.invention law Optoelectronics Irradiation Area density 0210 nano-technology business |
| Zdroj: | 2016 29th International Vacuum Nanoelectronics Conference (IVNC). |
| Popis: | Carbon nanotube (CNT) forests show great promise for efficient heat-to-electricity conversion due to their ability to confine heat to a localized area. In this work, we investigate CNT forest density as a possible factor in further optimizing their efficiency and lifetime. As a result of focused laser irradiation at different regions of the CNT forest surface, we detected a 2.5-times higher thermionic current at its corner compared to its center. In addition we observed a 30% reduction in incandescent spot area after 40 minutes and a higher 1600°C temperature at the corner, compared to a 60% reduction and 1520°C at the center. These findings appear to be correlated with the higher areal density at the corner compared to the center. |
| Databáze: | OpenAIRE |
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