The Experts below are selected from a list of 53346 Experts worldwide ranked by ideXlab platform
Yongsheng Wang - One of the best experts on this subject based on the ideXlab platform.
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Au nanoparticles and graphene quantum dots co-modified Glassy Carbon Electrode for catechol sensing
Chemical Physics Letters, 2016Co-Authors: Xuan Zhao, Yongsheng WangAbstract:Abstract In this letter, the gold nanoparticles and graphene quantum dots were applied to the modification of Glassy Carbon Electrode for the detection of catechol. The synergist cooperation between gold nanoparticles and graphene quantum dots can increase specific surface area and enhance electronic and catalytic properties of Glassy Carbon Electrode. The detection limit of catechol is 0.869 μmol/L, demonstrating the superior detection efficiency of the gold nanoparticles and graphene quantum dots co-modified Glassy Carbon Electrode as a new sensing platform.
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a square wave voltammetric method for the detection of microorganism populations using a mwnt modified Glassy Carbon Electrode
Electrochimica Acta, 2012Co-Authors: Yongsheng Wang, Xilin Xiao, Lifu Liao, Yali Yuan, Jun He, Bo He, Yimou WuAbstract:Abstract A novel method for determination of trace amounts of microorganism populations in solution was developed by using a multiwalled Carbon nanotube (MWNT) modified Glassy Carbon Electrode and square wave voltammetry (SWV). The simultaneous combination of MWNT and SWV allowed the electrochemical signal of electro-active materials in Escherichia coli O157:H7 ( E . coli ) to be dramatically amplified. Compared with a bare Glassy Carbon Electrode, the MWNT-modified Glassy Carbon Electrode showed catalytic properties in the oxidation of electro-active materials on cell surfaces. Moreover, SWV was proved to be more sensitive than cyclic voltammetry (CV) for investigation of the electrochemical behavior of cells. In this paper, a linear relationship was obtained between the SWV peak current and the cell concentration in the range 2 × 10 2 –2 × 10 8 cell mL −1 with a detection limit of 2 × 10 2 cell mL −1 . The effect of antibiotic drug Gentamycin Sulfate injection (GSI) on the growth of E . coli was also investigated.
Ana Maria Oliveira-brett - One of the best experts on this subject based on the ideXlab platform.
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Electrochemical Oxidation of Sanguinarine and of Its Oxidation Products at a Glassy Carbon Electrode – Relevance to Intracellular Effects
Electroanalysis, 2009Co-Authors: Victor C. Diculescu, Teodor Adrian Enache, Paulo J. Oliveira, Ana Maria Oliveira-brettAbstract:The electrochemical behavior of sanguinarine, a quaternary benzophenanthridine glycoside alkaloid with antimicrobial, anti-inflammatory, antioxidant and/or immune-stimulatory activities, was studied at a Glassy Carbon Electrode using cyclic, differential pulse, and square wave voltammetry. The oxidation of sanguinarine is a quasireversible, diffusion-controlled process and occurred in a cascade mechanism with the formation of several oxidation products which adsorbed at the Electrode surface. The oxidation of sanguinarine is pH dependent and involves the transfer of the same number of electrons and protons. The adsorbed sanguinarine oxidation products are reversibly oxidized at the Glassy Carbon Electrode surface and their oxidation for a wide range of pHs was also studied by differential pulse and square wave voltammetry. A mechanism for the oxidation of sanguinarine at Glassy Carbon Electrode is proposed.
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Electrochemical Oxidation of Berberine and of Its Oxidation Products at a Glassy Carbon Electrode
Electroanalysis, 2009Co-Authors: Victor C. Diculescu, Teodor Adrian Enache, Paulo J. Oliveira, Ana Maria Oliveira-brettAbstract:The electrochemical behavior of berberine, an isoquinoline plant alkaloid with a wide spectrum of physiological effects, was studied at a Glassy Carbon Electrode using cyclic, differential pulse and square-wave voltammetry. The oxidation of berberine is a quasireversible, diffusion-controlled process and occurred in a cascade mechanism with the formation of several oxidation products. The diffusion coefficient of berberine was calculated from cyclic voltammetry studies to be D ¼ 1.69 � 10 � 6 cm 2 s � 1 . The oxidation process of berberine is also pH dependent and the number of electrons and protons transferred was determined using differential pulse voltammetry. The formation of several oxidation products that adsorbed at the Glassy Carbon Electrode surface was observed and their electrochemical behavior characterized. A mechanism for the oxidation of berberine at a Glassy Carbon Electrode was proposed.
Zhonggang Liu - One of the best experts on this subject based on the ideXlab platform.
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selective detection toward cd2 using fe3o4 rgo nanoparticle modified Glassy Carbon Electrode
Journal of Electroanalytical Chemistry, 2014Co-Authors: Yufeng Sun, Wenkai Chen, Tianjia Jiang, Jinhuai Liu, Zhonggang LiuAbstract:Abstract This work reports the detailed study on the magnetite–reduced graphene oxide (Fe3O4–RGO) modified Glassy Carbon Electrode, which could be used for the selective electrochemical detection of Cd2+. The Fe3O4–RGO modified Glassy Carbon Electrode (GCE) was characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Square wave anodic stripping voltammetry (SWASV) was applied for the detection of Cd2+. The limit of detection with the Fe3O4–RGO modified Electrode toward Cd2+ was calculated as 0.056 μM (3σ method). The electrochemical parameters that exert influence on deposition and stripping of metal ions, such as supporting electrolytes, pH values, deposition potential and deposition time, were optimized. Besides, the interference and stability measurements were also evaluated under the optimized parameters. More importantly, selective detection toward Cd2+ was achieved. It is meaningful for electrochemical method to overcome the great challenge of improving the selectivity toward heavy metal ions.
Ke Wang - One of the best experts on this subject based on the ideXlab platform.
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direct Electrodeposition of reduced graphene oxide on Glassy Carbon Electrode and its electrochemical application
Electrochemistry Communications, 2011Co-Authors: Liuyun Chen, Yanhong Tang, Ke WangAbstract:Abstract Graphene nanosheets were directly deposited onto a Glassy Carbon Electrode through cyclic voltammetric reduction of a graphene oxide colloidal solution. The resulting Electrodes were characterized by electrochemical methods and scanning electron microscopy. The application of the graphene modified Electrodes in simultaneous determination of hydroquinone and catechol was investigated.
Victor C. Diculescu - One of the best experts on this subject based on the ideXlab platform.
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Electrochemical Oxidation of Sanguinarine and of Its Oxidation Products at a Glassy Carbon Electrode – Relevance to Intracellular Effects
Electroanalysis, 2009Co-Authors: Victor C. Diculescu, Teodor Adrian Enache, Paulo J. Oliveira, Ana Maria Oliveira-brettAbstract:The electrochemical behavior of sanguinarine, a quaternary benzophenanthridine glycoside alkaloid with antimicrobial, anti-inflammatory, antioxidant and/or immune-stimulatory activities, was studied at a Glassy Carbon Electrode using cyclic, differential pulse, and square wave voltammetry. The oxidation of sanguinarine is a quasireversible, diffusion-controlled process and occurred in a cascade mechanism with the formation of several oxidation products which adsorbed at the Electrode surface. The oxidation of sanguinarine is pH dependent and involves the transfer of the same number of electrons and protons. The adsorbed sanguinarine oxidation products are reversibly oxidized at the Glassy Carbon Electrode surface and their oxidation for a wide range of pHs was also studied by differential pulse and square wave voltammetry. A mechanism for the oxidation of sanguinarine at Glassy Carbon Electrode is proposed.
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Electrochemical Oxidation of Berberine and of Its Oxidation Products at a Glassy Carbon Electrode
Electroanalysis, 2009Co-Authors: Victor C. Diculescu, Teodor Adrian Enache, Paulo J. Oliveira, Ana Maria Oliveira-brettAbstract:The electrochemical behavior of berberine, an isoquinoline plant alkaloid with a wide spectrum of physiological effects, was studied at a Glassy Carbon Electrode using cyclic, differential pulse and square-wave voltammetry. The oxidation of berberine is a quasireversible, diffusion-controlled process and occurred in a cascade mechanism with the formation of several oxidation products. The diffusion coefficient of berberine was calculated from cyclic voltammetry studies to be D ¼ 1.69 � 10 � 6 cm 2 s � 1 . The oxidation process of berberine is also pH dependent and the number of electrons and protons transferred was determined using differential pulse voltammetry. The formation of several oxidation products that adsorbed at the Glassy Carbon Electrode surface was observed and their electrochemical behavior characterized. A mechanism for the oxidation of berberine at a Glassy Carbon Electrode was proposed.