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Meeting MS&T23: Materials Science & Technology
Symposium Nanotechnology for Energy, Environment, Electronics, Healthcare and Industry
Presentation Title L-8: Thermal Transport in Electrically Tunable Thermal Switches Based on Multilayer Graphene and CNT
Author(s) Saqeeb Adnan, Pietro Steiner, Coskun Kocabas, Marat Khafizov
On-Site Speaker (Planned) Saqeeb Adnan
Abstract Scope This work highlights the development and characterization of electrically tunable graphene-based thermal switch devices utilizing a reversible intercalation process by an applied voltage, with potential applications in avionics, automotive, and microelectronics. We demonstrate the use of a laser-based thermo-reflectance technique to measure the modulation of thermal conductivity of the devices under different voltage bias conditions. A generalized thermal wave model predicting temperature profiles in the multilayer structure consisting of active carbon, ionic liquid containing polymer, and conductive layers is used to isolate conductivity of the active layer. The model is customized to account for the thermal anisotropy present between the basal plane and c-axis of the multilayer graphene and CNT, materials that are essential to these thermal devices. Additionally, we present a microstructure-informed thermal conductivity model that describes phonon-mediated thermal transport accounting for the intercalation-induced microstructural changes. This microstructure-informed transport model provides further opportunities for developing thermal switch devices.


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