Electrochemistry of modified electrodes

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Presentation transcript:

生物电分析化学 Electroanalytical Chemsitry and Its Biological Applications 主讲人：刘宏教授 2014年秋

Electrochemistry of modified electrodes

Electrochemistry of modified electrodes

Electrochemistry of modified electrodes Langmuir isotherm Nernst equation Faraday’s law

Electrochemistry of modified electrodes Peak current Peak potential peak width at half height

Chronocoulometry

Chronocoulometry DNA modified electrode

Scanning Electrochemical Microscope (SECM) For spherical or hemispherical UME, For disk UME,

SECM

Insulating substrate Approaching curve

Conductive substrate

Heterogeneous reaction kinetics

Homogeneous reaction kinetics

Single molecule detection

Electrocatalyst activity ORR reaction Imaging electrocatalytic activity of ORR

Enzyme imaging

Surface interrogation

Ion-selective tip

SECM for microfabrication

SECM for microfabrication

SECM for microfabrication

Assignments For a reversible reaction: O+e=R, how do you know if both O and R is freely diffused in the electrolyte solution or both O and R are adsorbed on the electrode by running CV experiments. From a SECM approaching curve, if the substrate is a conductor, what is the tip-substrate distance for IT (L) = 0.25. assuming the tip radius is 10 um. Give an example to show how SECM can be applied to your research project.

Exam 下周or下下周？试题英文，可用中文做答 80分作业题开卷考试