Heat dissipation in graphene foams
| Autor: | Yaniv Cohen, Siva K. Reddy, Assaf Ya'akobovitz |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Convection
Materials science Infrared Orders of magnitude (temperature) Graphene Graphene foam 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences law.invention symbols.namesake law Heat transfer Thermal symbols General Materials Science Electrical and Electronic Engineering Composite material 0210 nano-technology Raman spectroscopy |
| Zdroj: | Nano Research. 14:829-833 |
| ISSN: | 1998-0000 1998-0124 |
| Popis: | Graphene foam (GF)—a three-dimensional network of hollow graphene branches—is a highly attractive material for diverse applications. However, to date, the heat dissipation characteristics of GFs have not been characterized. To fill this gap, we synthesized GF devices, subjected them to high temperatures, and investigated their thermal behavior by using infrared microthermography. We find that while the convective area of GF devices is comparable to that of bulk materials (such as metals), the coefficient of convection of these devices is several orders of magnitude higher than that of metals. In addition, the GF devices showed a reproducible thermal behavior, which we attribute to negligible temperature-induced morphological changes (as confirmed by Raman analysis). Taken together, our findings suggest GF as a promising candidate material for advanced cooling applications where efficient heat dissipation is needed, e.g., in electrical circuits. |
| Databáze: | OpenAIRE |
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