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Characterization of Organic Thin Films by Abraham Ulman

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6

Surface Potential

STEPHEN D. EVANS

Contents

6.1   Introduction

6.2   Origins of the Contact Potential Difference and Surface Potential

6.3   Measurement of Surface Potential

6.4   Surface Potentials of Organic Thin Films

6.5   Conclusions

6.1 Introduction

Measurements of surface potential (SP) have been performed on a wide variety of systems over the past half century. They have been used for a range of studies from the determination of work functions of materials to the study of adsorption at fluid–fluid interfaces.

For descriptive purposes it is convenient to split the discussion of organic thin films at interfaces into two parts, the first dealing with films at the air–water interface and the second with those at solid–air interfaces. ...

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