In neutral condition, three kinds of amino monolayer show electronegative, which has an electrostatic repulsion to the negative REDOX probe.

三种氨基酸修饰玻碳电极表面在中性溶液均呈现荷负电性，对于带负电荷的活性探针离子均具有静电排斥作用。

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The experiment results indicated that there is a not very compact Lysine monolayer on the surface of glassy carbon electrode, which has an electrostatic repulsion to the negative REDOX probe.

实验结果表明，赖氨酸分子在电极表面组装形成的单层膜不很致密，对于呈负电性的活性探针离子具有静电排斥作用。

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