A new artificial sensing system could enable soft bioelectronics to perceive and process touch in real time, offering an alternative to current devices with a sensory processing lag. SciRobotics
In fast and transient somatosensory processing, the relative timing of the selected spikes is more important than the spike frequency because the ensemble of the first spikes in the spike trains encodes the dynamic tactile information. Here, inspired by the functional effectiveness of the selected spikes, we propose an artificial dynamic sensory system based on position-encoded spike spectrum. We use a mixed ion-electron conductor to generate a potential spike signal.
We design artificial receptors that have different ion relaxation times ; thus, a sequence of the spikes from the receptors creates a spike spectrum, providing the spatial information and the temporal information . The artificial receptors can be incorporated by as much as 132/square centimeters by using only two global signal addressing lines for sensor operation. Structural simplicity of the device opens the possibility of scalable fabrication with dense receptor integration.
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