Introduction Literature Review Experimental procedures and Materials Fabrication of Cobalt(II) Immobilized ZnO/MWCNT/PCL Nanocomposite Film: Electrocatalytic Detection of Glucose Synthesis and Characterization of Gelatin Stabilized Anatase Titanium Dioxide Nanoparticles via the Sol-Gel Method and its Applications for Sensitive Detection of L-Tryptophan Fabrication of Ni(II)/PAN/MWCNT Nanocomposite Films Electrocatalytic Detection of Carbohydrates Fabrication of Chitosan-Multi Walled Carbon Nanotube Nanocomposite Containing Ferri/Ferrocyanide: Applications for Simultaneous Detection of D-Penicillamine and L-Tryptophan Conclusion