Graphite sheets can be turned into pressure sensors that feel movement without ever bending or stretching.
Most biological and mechanical sensors rely on a physical change, like a membrane stretching, to detect a touch. These graphite nanoslits achieve the same sensitivity by using the interaction between fluid flow and surface charges. When pressure is applied, the way ions move through the tiny gaps changes instantly, creating an electrical signal. This allows for the creation of incredibly durable sensors that do not wear out from repeated flexing. It mimics the mechanosensitivity of living cells using only the physics of fluids and carbon.
Architecting mechanosensitive nanofluidic transport in graphite nanoslits
arXiv · 2605.00661
Mechanosensitive ion transport plays a central role in enabling living systems to perceive and adapt to their environment through the deformation of soft, embedded ion channels. In this work, we demonstrate that ion transport within a two-dimensional graphite nanoslit can be rationally engineered to achieve a bipolar, pressure-sensitive response without any structural deformation. The mechanosensitivity arises from the selective charging of one channel inlet, which acts as a reversible source of