@article { author = {Sharifi Pour, Effat and Beitollahi, Hadi}, title = {Novel electrochemical sensing platform for caffeine using three dimensional NiO nanowrinkles modified glassy carbon electrode}, journal = {Eurasian Chemical Communications}, volume = {3}, number = {8}, pages = {551-558}, year = {2021}, publisher = {Sami Publishing Company (SPC)}, issn = {2717-0535}, eissn = {2676-6280}, doi = {10.22034/ecc.2021.287723.1181}, abstract = {We addressed electrochemical behaviors of caffeine at the modified sensor (three dimensional NiO nanowrinkles modified glassy carbon electrode (3D NiO NWs/GCE)) in an aqueous medium with cyclic voltammetry, differential pulse voltammetry and chronoamperometry. The modification of sensor was performed by drop-casting process. Electrochemical investigations showed that the fabricated 3D NiO NWs/GCE sensor exhibited excellent catalytic performance for the oxidation of caffeine. Based on the optimal conditions of pH=7.0 in CV, caffeine oxidation happens at a potential ~200 mV less positive than that of the unmodified GCE. The current response of 3D NiO NWs/GCE sensors presents a remarkable sensitivity based on CV. The calibration plot is linear (R2: 0.9991) over the concentrations ranging between 0.1 and 800.0 μM of caffeine. Limit of detection (LOD) was 0.03 μM for caffeine.}, keywords = {Caffeine,three dimensional NiO nanowrinkles,glassy carbon electrode,Electrochemical sensor}, url = {https://www.echemcom.com/article_134012.html}, eprint = {https://www.echemcom.com/article_134012_e422c2ebe973b3d91cfb3fb7fd23335c.pdf} }