The European BioSensor Symposium is bringing together both experienced and young scientists to discuss new insights in all aspects of biosensor research and related areas, to push forward cutting-edge ideas and novel approaches as well as to inspire for scientific exchange among all groups of participants. Its fourth edition was hosted by the University of Applied Sciences Aachen and took place in the city of Aachen, Germany from 27 to 30 August 2023.

 The topics the Symposium tackled were the following:

• Technologies for innovative formats such as implantable, non-invasive, single-use biosensors, and paper-based diagnostics
• Bioengineered and biomimetic recognition elements
• Nanotechnology, surface engineering and bioelectronics
• Cell-based biosensors and single cell-based diagnostics
• Advances in applications
• Microfluidics and actuators for biosensing and integration
• Theory, modelling and software development

Prof. Fabiana Arduini, leader of the antimicrobial characterization activities in RELIANCE was invited as plenary speaker at the Symposium where she presented an overview of the smart use of paper for the development of electrochemical biosensors, which includes the use of paper-based electrochemical (bio)sensors for target analytes in solution, aerosol, and surface. In the case of RELIANCE project, we are developing paper-based electrochemical (bio)sensors to evaluate the efficiency of the nano-coatings developed within the project.