SiM20 Posters

Sensors in Medicine 2020 12 Electrochemical Multi-Analyte Point-of- Care Perspiration Sensors Using On Chip Three-Dimensional Graphene Electrodes Meike Bauer 1 , Lukas Wunderlich 1 , Florian Weinzierl 1 , Yongjiu Lei 2 , Axel Duerkop 1 , Husam N. Alshareef 2 , Antje J. Baeumner 1, * 1 Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, 93040 Regensburg, Germany. 2 Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi-Arabia. * Antje.Baeumner@ur.de Motivation Wearable sensors recently gain in importance for end consumer devices. To further expand their functionality, new methods capable of non-invasive health monitoring are needed. In this regard, sweat represents an ideal matrix. It contains a variety of analytes (e.g. ions, lactate, glucose) which are important biomarkers representing personal health and fitness status. A promising and suitable material to create affordable devices is laser-induced graphene (LIG). Sensor Design Laser-Induced Graphene The conductive and porous graphene- like structure is obtained by exposing the non-conductive and flexible polyimide substrate to a high intensity CO 2 infrared laser beam. The all-LIG sensor electrodes are modified with different materials by various methods to meet the required demands for the respective electrochemical detection methods. Nearly endless electrode and sensor designs are possible to “print” with this fast and easy fabrication procedure. 40 µm