Our research group is focused on developing multi-architecture spectroelectrochemical sensors based on multi-responsive polymers as molecular receptors for multiplex analytes detection. Fabricated by layer by layer (LbL) assembly, in this presentation we will demonstrate our versatile flexible and rigid microneedle electrochemical probes based on biomimetric redox responsive composite hydrogels for in-situ multiplex detection of biologically relevant chemical markers, e.g., dissolved oxygen, redox biomarkers, antioxidants, soil nutrients such as phosphates and nitrates, lactic acid, cortisol, adrenaline, electrolytes, and pH. The composite hydrogels in these sensors simultaneously serves as an interface for biological fluid sampling and a medium for electrochemical sensing. These sensors will be demonstrated as wearable devices, also referred to e-skins, for real-time wireless monitoring of soil/plant growing medium, on-plant plant stress diagnostics, and ‘emotion’ sensing in animals using non-invasive biological fluids, e.g., sweat, and interstitial fluids for animals, and apoplastic exudates for plants.
Our embedded multiplex sensors are aimed to be enabling proactive diagnostics technology for realization of environmental, social and economic aspects that align with the United Nation’s Sustainable Development Goals (UN SGDs), particularly sustainable smart agriculture, food security, environmental conservation, and in general, equity in global societies wellbeing.