A Sustainable Approach to Glucose Biosensors: Utilizing Coconut Shell Activated Carbon and NiCaFe₂O₄ NanoparticlesAmin Fatoni, David Hutama, Dadan Hermawan, Saluma Samanman and Mekar Dwi AnggraeniE3S Web Conf., 609 (2025) 02002DOI: https://doi.org/10.1051/e3sconf/202560902002