One-pot synthesis of magnetite nanorods/graphene composites and its catalytic activity toward electrochemical detection of dopamine

Electrocatalytic oxidation of carbohydrates and dopamine in alkaline and neutral medium using CuO nanoplatelets

“…Though there are many reports [51,52] for the each (10 µM) addition of dopamine [28]. The results explain that the electrocatalytic peak current of DA oxidation at the surface of CuO NPlts/Nf/GCE were linearly dependent on the DA concentration over the concentration range of 10 µM-80 µM with a high sensitivity of 1312.9 µAmM -1 cm -2 (R = 0.9903) and detection limit 8.25 µM (Fig.…”

“…Dopamine (DA) is an important neurotransmitter molecule of catecholamine that is widely distributed in the mammalian central nervous system for message transfer [27]. The deficiency of dopamine in the central nervous system is affected by some neurological diseases such as schizophrenia and parkinson's disease and the high level of DA in biological system leads to reward, pleasurable feelings and euphoria [28] In this paper, platelet-like CuO were prepared by hydrothermal method using copper chloride (CuCl 2 ), sodium hydroxide (NaOH) as primary precursors and CTAB as surfactant, which was found to be homogeneously shaped. Furthermore, the asprepared nanoplatelets were utilized for the novel electrochemical simultaneous determination of carbohydrates and dopamine.…”

Electrochemical assay of α-glucosidase activity and the inhibitor screening in cell medium

“…In order to eliminate these interferences and increase the detected accuracy, it will be a good manner to separate the products after enzymecatalyzed reaction. Magnetic nanoparticles (MNPs), with unique magnetic separation ability, can simplify the isolation procedure and speed up the assay process (Ma et al, 2013;Salamon et al, 2015). So, MNPs modified with the substrate of α-glucosidase have been synthesized and used in this proposed new method, thus a more feasible method for the assay of α-glucosidase activity and the inhibitor screening has been establish, which can be directly used in cell medium.…”

“…However, electrochemical method has not been established to determine α-glucosidase activity and screen its inhibitor. On the other hand, one-step competitive displacement reaction strategy attracted substantial research interests recently in the analytical fields, because of its simplicity, specificity and reliable quantitative results (Ma et al, 2013;Salamon et al, 2015), although most of the present displacement reaction systems are applied to the detection of nucleic acids and the antigen-antibody reaction (Sapsford et al, 2002;Tang et al, 2014). It happens that the strategy was reported to be devoted to the investigation of the interaction between sugar and boronic acid , thus reversible covalent bonds between phenylboronic acid and 1,2-/1,3-cis-diols in aqueous solution have been used for the construction of molecular receptors (Yum et al, 2012).…”

Cobaltite oxide nanosheets anchored graphene nanocomposite as an efficient oxygen reduction reaction (ORR) catalyst for the application of lithium-air batteries

“…In addition to the D and G bands, rGO/Co 3 O 4 composite(Fig. 2b(ii)) exhibited the characteristic Raman bands at 462, 508, 604, and 677 cm -1 , which are corresponding to the Eg, high electrical conductivity, increased edge planes and decreased in-plane sp 2 domains of the prepared composite[47].The FT-IR spectrum of Co 3 O 4 nanosheets(Fig. 2c(i)) exhibited distinctive bands at 537 and 699 cm −1 and are attributed to the BBO 3 vibrations in the octahedral hole and ABO 3 vibrations in the spinel lattice of Co 2+ in the tetrahetral hole, respectively[48].…”