Graphene-based electromechanical thermal switches

Thermal management is an important challenge in modern electronics, avionics, automotive, and energy storage systems. While passive thermal solutions (like heat sinks or spreaders) are often used, actively modulating flow (e.g. via switches diodes) would offer additional degrees of control over the transients system reliability. Here we report first switch based on flexible, collapsible graphene membranes with low operating volt-age (~2 V) switching ratio up to ~1.3. We also employ active-mode scanning microscopy (SThM) measure device behavior real time. A compact analyti-cal model developed for general case a double-clamped suspended membrane, highlighting electrical design challenges. System-level mod-eling demonstrates trade-offs between temperature swing average tem-perature as function ratio. These graphene-based present new op-portunities active fast (even nanosecond) densely integrated