%0 Journal Article %T Novel electrochemical sensing platform for caffeine using three dimensional NiO nanowrinkles modified glassy carbon electrode %J Eurasian Chemical Communications %I Sami Publishing Company (SPC) %Z 2717-0535 %A Sharifi Pour, Effat %A Beitollahi, Hadi %D 2021 %\ 08/01/2021 %V 3 %N 8 %P 551-558 %! Novel electrochemical sensing platform for caffeine using three dimensional NiO nanowrinkles modified glassy carbon electrode %K Caffeine %K three dimensional NiO nanowrinkles %K glassy carbon electrode %K Electrochemical sensor %R 10.22034/ecc.2021.287723.1181 %X 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. %U https://www.echemcom.com/article_134012_e422c2ebe973b3d91cfb3fb7fd23335c.pdf