2023/07/28 by Eden Steven, Steven, Eden, Danica Krstovska +9
Chemical Engineering · Materials Science · Physics and Astronomy · #Analytical Chemistry and Sensors #Applied Physics (physics.app-ph) #FOS: Physical sciences #Mechanical and Optical Resonators #Organic and Molecular Conductors Research
paper · pdf · doi:10.48550/arxiv.2307.15575
openalex publication_date 2023/07/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Flexible sensors made from organic bilayer films of molecular conductor on polymeric matrix have attracted many interest due to their simple fabrication with high potential for being scaled up, and for their high-performing multi-functionality at room temperatures. In particular, the piezoresistive property of the organic bilayer film is among one of the highest ever reported, allowing its utilization in various sensing applications. In this work, we present the study of the flexural piezoresistivity of an organic bilayer film based on β-\rm (BEDT-TTF)2I3 on polycarbonate matrix from room temperatures down to cryogenics temperatures. Non-trivial temperature dependent profile of the gauge factor is revealed, including enhancement of the gauge factor from ∼ 18 at room temperatures to ∼ 48 at 4.3 K. An organic bilayer cantilever magnetometer is developed and demonstrated to measure magnetic properties of a single crystalline organic superconductor κ-\rm (BEDT-TTF)2Cu(N(CN)2)Br at temperatures down to ∼ 2.75 K and magnetic fields up to 5 T. The high-performing bilayer devices can be fabricated in a very simple manner, and they are robust and recyclable.