Ultrafast cyclic voltammetry was used to study the redox behavior of a gold electrode in acetonitrile. The direct electrochemical evidence of the dissociation and adsorption behavior of acetonitrile at gold electrodes...Ultrafast cyclic voltammetry was used to study the redox behavior of a gold electrode in acetonitrile. The direct electrochemical evidence of the dissociation and adsorption behavior of acetonitrile at gold electrodes was found. It could be stated that two consecutive redox paths are involved, each with a special adsorption state acting as the reaction intermediate. The mean value, obtained of the electron-transfer rate constant of the second path, was 1.3 × 10^5 s^-1 with a standard deviation of 0.24 × 10^5 s^-1.展开更多
Based on the perfect ohmic drop compensation by online electronic positive feedback, ultrafast cyclic voltammetry with asymmetrical potential scan is achieved for the first time, with the reduction of anthracene actin...Based on the perfect ohmic drop compensation by online electronic positive feedback, ultrafast cyclic voltammetry with asymmetrical potential scan is achieved for the first time, with the reduction of anthracene acting as the test system. Compared with the traditional cyclic voltammetry utilizing symmetrical triangular waveform as the excitation one, the new method allows a simpler approach to mechanistic analysis of ultrafast chemical reactions coupled with a charge transfer. And perhaps more important, it also provides a way to eliminate the interference of the adsorbed product in dynamic monitoring. 2007 Zhi Yong Guo. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.展开更多
A rapid,sensitive,selective and reliable strip assay based on DNA-functionalized gold nanoparticles for Hg^（2＋） detection has been developed,with a detection limit 5 nmol/L.The measurement principle was based on th...A rapid,sensitive,selective and reliable strip assay based on DNA-functionalized gold nanoparticles for Hg^（2＋） detection has been developed,with a detection limit 5 nmol/L.The measurement principle was based on thymine-Hg^（2＋）-thymine（T-Hg^（2＋）-T） coordination chemistry and streptavidin-biotin interaction.The major advantages of this assay are that results can be read visually without any instrument in less than 10 min and that it does not require any sample pretreatment.展开更多
基金This work was financed by the National Natural Science Foundation of China （No. 20173054）.
文摘Ultrafast cyclic voltammetry was used to study the redox behavior of a gold electrode in acetonitrile. The direct electrochemical evidence of the dissociation and adsorption behavior of acetonitrile at gold electrodes was found. It could be stated that two consecutive redox paths are involved, each with a special adsorption state acting as the reaction intermediate. The mean value, obtained of the electron-transfer rate constant of the second path, was 1.3 × 10^5 s^-1 with a standard deviation of 0.24 × 10^5 s^-1.
基金We are grateful to the National Natural Science Foundation of China （No. 20173054）；the Natural Science Foundation of Ningbo City （No. 2006A610044）.
文摘Based on the perfect ohmic drop compensation by online electronic positive feedback, ultrafast cyclic voltammetry with asymmetrical potential scan is achieved for the first time, with the reduction of anthracene acting as the test system. Compared with the traditional cyclic voltammetry utilizing symmetrical triangular waveform as the excitation one, the new method allows a simpler approach to mechanistic analysis of ultrafast chemical reactions coupled with a charge transfer. And perhaps more important, it also provides a way to eliminate the interference of the adsorbed product in dynamic monitoring. 2007 Zhi Yong Guo. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
基金Financial supports from Science and Technology Department of Zhejiang Province of China(No2010C33004)Department of Education of Zhejiang Province(NoY201010064) are gratefully acknowledgedsponsored by KCWong Magna Fund in Ningbo University
文摘A rapid,sensitive,selective and reliable strip assay based on DNA-functionalized gold nanoparticles for Hg^（2＋） detection has been developed,with a detection limit 5 nmol/L.The measurement principle was based on thymine-Hg^（2＋）-thymine（T-Hg^（2＋）-T） coordination chemistry and streptavidin-biotin interaction.The major advantages of this assay are that results can be read visually without any instrument in less than 10 min and that it does not require any sample pretreatment.
