The goal of the skin is to sense important environmental parameters—such as proximity to objects, heat, moisture, and direct touch sensations.
Examples of a sensitive skin have been made by a group at the University of Tokyo led by Prof. Takao Someya.
The sensor arrays are based on many organic thin film transistors that are turned on one at a time and the current that flows through the sensor (electrical resistance-based) tells you how much pressure is being sensed.
They have simultaneously measured pressure and temperature by using two separate arrays and laying one on top of another.
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