Chiral behaviors of magnetoelectrodeposited Ag film electrodes were investigated for the electrochemical reactions of glucose and cysteine. The Ag films were electrodeposited under a magnetic field of 2 T perpendicula...Chiral behaviors of magnetoelectrodeposited Ag film electrodes were investigated for the electrochemical reactions of glucose and cysteine. The Ag films were electrodeposited under a magnetic field of 2 T perpendicular to the electrode surface at various potentials 0f-0.06-0.4 V （vs Ag I Ag＋）. The current-time curves during the electrodeposition and the surface morphology of the films implied that the film growth was considerably affected by the micro-MHD （magnetohydrodynamic） effect. Such Ag films were employed as an electrode, and voltammograms of glucose and cysteine were examined. Chiral behavior was clearly observed as current difference between the enantiomers on the film electrodes prepared at electrodeposition potentials less than -0.1 V. Such electrochemical chirality disappeared after the oxidation and reduction of the surface monolayer, and this fact indicates that the chiral sites must be just on the film surface.展开更多
Cu films were electrodeposited under a magnetic field of 5 T on the Pt disc electrodes with diameters of 3 mm ~ 25 μm.Such magnetoelectrodeposited(MED) Cu films were employed as an electrode,and cyclic voltammograms ...Cu films were electrodeposited under a magnetic field of 5 T on the Pt disc electrodes with diameters of 3 mm ~ 25 μm.Such magnetoelectrodeposited(MED) Cu films were employed as an electrode,and cyclic voltammograms were measured for the electrochemical reactions of an amino acid of alanine.Chiral behavior was observed as oxidation current difference between the enantiomers.Clear magnetoelectrochemical chirality was observed on the micro-disk electrode and on the kinetic-controlled electrode process of alanine.The chiral response was durable for more than 10 cycles of the consecutive voltammetric measurements of the enantiomers.展开更多
The theoretical and numerical studies on kinetic micro-instabilities,including ion temperature gradient（ITG） driven modes,trapped electron modes（TEMs） in the presence of impurity ions as well as impurity modes（IM...The theoretical and numerical studies on kinetic micro-instabilities,including ion temperature gradient（ITG） driven modes,trapped electron modes（TEMs） in the presence of impurity ions as well as impurity modes（IMs）,induced by impurity density gradient alone,in toroidal magnetized plasmas,such as tokamak and reversed-field pinch（RFP） are reviewed briefly.The basic theory for IMs,the electrostatic instabilities in tokamak and RFP plasmas are discussed.The observations of hybrid and coexistence of the instabilities are categorized systematically.The effects of impurity ions on electromagnetic instabilities such as ITG modes,the kinetic ballooning modes（KBMs） and kinetic shear Alfvén modes induced by impurity ions in tokamak plasmas of finite β（=plasma pressure/magnetic pressure） are analyzed.The interesting topics for future investigation are suggested.展开更多
文摘Chiral behaviors of magnetoelectrodeposited Ag film electrodes were investigated for the electrochemical reactions of glucose and cysteine. The Ag films were electrodeposited under a magnetic field of 2 T perpendicular to the electrode surface at various potentials 0f-0.06-0.4 V （vs Ag I Ag＋）. The current-time curves during the electrodeposition and the surface morphology of the films implied that the film growth was considerably affected by the micro-MHD （magnetohydrodynamic） effect. Such Ag films were employed as an electrode, and voltammograms of glucose and cysteine were examined. Chiral behavior was clearly observed as current difference between the enantiomers on the film electrodes prepared at electrodeposition potentials less than -0.1 V. Such electrochemical chirality disappeared after the oxidation and reduction of the surface monolayer, and this fact indicates that the chiral sites must be just on the film surface.
文摘Cu films were electrodeposited under a magnetic field of 5 T on the Pt disc electrodes with diameters of 3 mm ~ 25 μm.Such magnetoelectrodeposited(MED) Cu films were employed as an electrode,and cyclic voltammograms were measured for the electrochemical reactions of an amino acid of alanine.Chiral behavior was observed as oxidation current difference between the enantiomers.Clear magnetoelectrochemical chirality was observed on the micro-disk electrode and on the kinetic-controlled electrode process of alanine.The chiral response was durable for more than 10 cycles of the consecutive voltammetric measurements of the enantiomers.
基金supported by National Natural Science Foundation of China(Nos.11475057 and 11575158)the National Key R&D Program of China under Grant No.2017YFE0300405
文摘The theoretical and numerical studies on kinetic micro-instabilities,including ion temperature gradient（ITG） driven modes,trapped electron modes（TEMs） in the presence of impurity ions as well as impurity modes（IMs）,induced by impurity density gradient alone,in toroidal magnetized plasmas,such as tokamak and reversed-field pinch（RFP） are reviewed briefly.The basic theory for IMs,the electrostatic instabilities in tokamak and RFP plasmas are discussed.The observations of hybrid and coexistence of the instabilities are categorized systematically.The effects of impurity ions on electromagnetic instabilities such as ITG modes,the kinetic ballooning modes（KBMs） and kinetic shear Alfvén modes induced by impurity ions in tokamak plasmas of finite β（=plasma pressure/magnetic pressure） are analyzed.The interesting topics for future investigation are suggested.
