Researchers at Iowa State University have developed graphene-based tape sensors that instantly measure the water vapor (transpiration) lost from the leaf surface.
New, low cost, easily produced and graphene based sensors can be attached to plant leaves. Flexible use and near-real value of plant water consumption can be important for farmers and researchers.
The measurement of water consumption is possible with small graphene sensors taped to the leaf. Grafen electricity and heat can be very well conveyed. Sensors built with graphite oxide are extremely sensitive to water vapor. The changes in water vapor at this point change the electrical conductivity of the material, so that the transpiration from the nearest true-to-nature can be measured.
These sensors have been successfully tested in the laboratory and on the field, and sensors with very small dimensions do not affect plant growth or production when detecting transpiration. Now researchers are working to make the sensors cheaper and higher performance.
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