![graphene-camera-captures-real-time-electrical-activity-of-beating-heart](https://utterbuzz.com/wp-content/uploads/2021/06/graphene-camera-captures-real-time-electrical-activity-of-beating-heart-640x427.jpg)
Scientists today track electrical signals and voltage changes in neurons and muscle cells by labeling individual cells or probing with electrodes. Scientists have now developed a new type of sensor that employs a sheet of graphene to get a continuous measure of electric field in these tissues. Electric fields change graphene’s reflectance. The physicists found a way to amplify and measure the changes caused by action potentials in a beating embryonic chicken heart.