عنوان	Amperometric NADH sensor based on a carbon ceramic electrode modified with the natural carotenoid crocin and multi-walled carbon nanotubes
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Crocin . Carbon ceramic electrode . Electroanalysis . Methyltrimethoxysilane . Sol-gel . Nanohybrid .Amperometry . Cyclic voltammetry . Charge transfer coefficient . Electrode surface coverage . Electrocatalytic oxidation
چکیده	A carbon ceramic electrode (CCE) was fabricated from a composite consisting of sol-gel, ceramic graphite, multi-walled carbon nanotubes and the natural carotenoid crocin. The resulting sensor is shown to allow for the determination of NADH at a rather low working potential of 0.22 V (vs. Ag/AgCl). The heterogeneous electron transfer rate constant (ks) and the surface coverage of the modified electrode are 16.8 s−1 and 22 pmol·cm−2, respectively. The sensor shows excellent and linear response in solutions of pH 7.0 over the 0.5 to 100 μMNADH concentration range, a 0.1 μMdetection limit, and a sensitivity of 251.3 nA·μM−1·cm−2.
پژوهشگران	محمود روشنی (نفر اول)، مریم کرمی (نفر دوم)، بهروز زارع دیزدجی (نفر سوم)