Graphene-Based Electromechanical Thermal Switches
| Autor: | Stephanie M. Bohaichuk, Andrew G. Alleyne, Miguel Muñoz Rojo, Feifei Lian, Michelle Chen, Sarah G. Garrow, Eric Pop, Kenneth E. Goodson, Aditya Sood, Christopher M. Neumann, Justin P. Koeln |
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| Přispěvatelé: | Thermal Engineering |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
FOS: Physical sciences 02 engineering and technology Scanning thermal microscopy Heat sink 7. Clean energy 01 natural sciences Energy storage law.invention Thermal conductivity law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Thermal General Materials Science Electronics 010302 applied physics Nanoelectromechanical systems Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics business.industry Graphene Mechanical Engineering Materials Science (cond-mat.mtrl-sci) General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Mechanics of Materials Optoelectronics 0210 nano-technology business |
| Zdroj: | 2D Materials, 8(3):035055. IOP Publishing Ltd. |
| ISSN: | 2053-1583 |
| Popis: | Thermal management is an important challenge in modern electronics, avionics, automotive, and energy storage systems. While passive thermal solutions (like heat sinks or heat spreaders) are often used, actively modulating heat flow (e.g. via thermal switches or diodes) would offer additional degrees of control over the management of thermal transients and system reliability. Here we report the first thermal switch based on flexible, collapsible graphene membranes with low operating volt-age (~2 V) and thermal switching ratio up to ~1.3. We also employ active-mode scanning thermal microscopy (SThM) to measure the device behavior and switching in real time. A compact analyti-cal thermal model is developed for the general case of a thermal switch based on a double-clamped suspended membrane, highlighting the thermal and electrical design challenges. System-level mod-eling demonstrates the thermal trade-offs between modulating temperature swing and average tem-perature as a function of switching ratio. These graphene-based thermal switches present new op-portunities for active control of fast (even nanosecond) thermal transients in densely integrated systems. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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