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dmdmdm

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[交流] 【求助】测试Mott-Schottkky曲线的意义

请教各位:
       本人在看文献中发现作者测定了不锈钢的Mott-Schottkky曲线,通过斜率之类的数值确定了电化学体系的参数。
       但小弟实在不知测试Mott-Schottkky曲线的原理和意义。
       请高手不吝赐教!
       谢谢!
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wentaoyao

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dmdmdm(金币+1):谢谢参与
引用回帖:
Originally posted by dmdmdm at 2010-12-22 10:51:16:
请教各位:
       本人在看文献中发现作者测定了不锈钢的Mott-Schottkky曲线,通过斜率之类的数值确定了电化学体系的参数。
       但小弟实在不知测试Mott-Schottkky曲线的原理和意义。
       请高手不吝赐 ...

Staircase Potentio Electrochemical Impedance Spectroscopy(Mott-Schottky),is designed to perform successive impedance measurements during a potential sweep. The main application of this technique is to study electrochemical reaction kinetics along voltamperometric curves in analytical electrochemistry. Thus this technique finds all its interest to study the complexity of non-stationary interfaces with faradic processes where the total AC response is required.
Another common application of such a technique is semi-conductor materials study. For these stationary systems,only two or three frequencies for each potential step are required to determine the donor density and the flat band potential. The SPEIS technique consists in a staircase potential sweep. An impedance measurement is performed on each potential step. For all these applications a Mott-Schottky plot (1/C2 vs. Ewe)can be displayed and a special linear fit is applied to extract the semi-conductor parameters.
2楼2010-12-22 15:34:11
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