Glass membrane electrodes 3 Glassy carbon electrodes Electrochemical sensors 2 Glass 2 Metalorganic frameworks (MOFs) 2 Nanocomposites 2 Organometallics 2 Aspect ratio 1 Aspect-ratio 1 Cobalt compounds 1 Copper compounds 1 Cyclic voltammetry 1 Electrocatalysts 1 Electrocatalytic behavior 1 Electrochemical activities 1 Electrochemical oxidation 1 Electrochemical reductions 1 Electrolytic reduction 1 Fabricated sensors 1 Fabrication 1 Graphene 1 Guanine 1 High-sensitivity detection 1 Highly sensitive detections 1 Hybrid nanocomposites 1 Low detection limit 1 MWCNT's 1 Metal organic framework materials 1 Modified glassy carbon electrode 1 Morphology 1