Zikulnig, JohannaMalik, Muhammad-HassanRauter, LukasLenzhofer, MartinCarrar, SandroKosel, Jurgen2024-06-192024-06-192024-06-192024-06-0110.1109/LSENS.2024.3396189https://infoscience.epfl.ch/handle/20.500.14299/208608WOS:001224403500004Addressing the environmental impact of electronic waste in biomedical sensing, an eco-conscious approach to the realization of a Chitosan-based Acetone sensor tag for wireless gas monitoring is presented. The fabrication involves inkjet printing of silver electrodes and antennas on a bio-based, biocompatible, and biodegradable polylactic acid foil, as well as Chitosan coating for sensor functionalization. A hybrid approach is followed for the realization of the sensor readout by integrating a commercial, passive near-field-communication sensor chip on the printed sensor tag. Overcoming challenges in room temperature processing, the applicability and bonding adhesion strength of a commercial pressure-sensitive anisotropic adhesive film for flip-chip bonding is studied. With an average adhesion strength of 5.38 N, the proposed method exhibits great potential for ambient temperature flip-chip integration. Wireless measurements of the sensor show a linear response at an Acetone concentration between 0 and 31 ppm.TechnologyPhysical SciencesSensorsTemperature SensorsGas DetectorsAntennasSubstratesWireless Sensor NetworksWireless CommunicationSensor SystemsAdditive ManufacturingEco-Conscious SensorsGas SensorHybrid IntegrationPoint-Of-Care DiagnosticsSingle Use TechnologiesPrinted ElectronicsWireless Sensortext::journal::journal article::research article