Berlin 2024 – scientific programme
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BP: Fachverband Biologische Physik
BP 24: Synthetic life-like systems and Origins of Life
BP 24.4: Talk
Wednesday, March 20, 2024, 16:00–16:15, H 1028
A Mechanical-Electrical Model to Describe the Negative Differential Resistance in Membranotronic Devices — •Max Huber1,2,3, Jörg Schuster1,2,3, Oliver G. Schmidt1,4,5, Harald Kuhn3, and Daniil Karnaushenko1 — 1Research Center for Materials, Architectures and Integration of Nanomembranes (MAIN), TU Chemnitz, Chemnitz, Germany — 2Center for Microtechnologies, TU Chemnitz, Chemnitz, Germany — 3Fraunhofer Institute for Electronic Nano Systems ENAS, Chemnitz, Germany — 4Material Systems for Nanoelectronics, TU Chemnitz, Chemnitz, Germany — 5Nanophysics, Faculty of Physics, TU Dresden, Dresden, Germany
Membranotronic devices are artificial neural membranes designed to mimic the functionality of biological neural networks [Adv. Funct. Mater., 32(24), 2200233 (2022)]. Negative differential resistance (NDR) is essential for their function. We present a physical model of a membranotronic device which generates NDR. It consists of a deformable membrane with holes allowing ion currents, which are modulated by a deformation resulting from an applied voltage. A mechanical model for micro-electro-mechanical systems describes the deformable membrane including holes. We perform a parameter variation study and show that our model can reproduce the NDR for a wide and physically reasonable range of parameter combinations. In essence, our work bridges the gap between artificial membranotronic devices and biological neural membrane by providing a robust physical model capable of emulating NDR, a key feature in the operation of such systems.
Keywords: Analytical Model; Elastomeric Membranes; Ion Transport; Membranotronics; Negative Differential Resistance