A research team develops biotransistors able to detect the smallest of signals

One of the tests that almost every patient must face before a surgery or other health intervention is an electrocardiogram. To perform this screening, medical doctors traditionally use a set of electrodes, which are able to record the electrical activity of the heart. The question is: what happens when the signal is much smaller, for instance, when you want to observe the activity of small clusters of cells or groups of cells within tissues?

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