Diagram showing how the technology works (IMAGE) University of Bath Caption The sensor is based on boronic acid attached to a graphene foam. An electroactive polymer layer is added on top and binds to the boronic acid. When glucose is present, it competitively binds to the boronic acid, displacing the polymer and producing an electric current. Credit University of Bath Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.