Journal
PHYSICA B-CONDENSED MATTER
Volume 406, Issue 22, Pages 4240-4244Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physb.2011.08.017
Keywords
Work function; Kelvin probe; Al-Mg alloys; Electronic structure
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Funding
- Natural Science Foundation of China [51061014]
- State Key Laboratory for Mechanical Behavior of Materials [201011003]
- National Science Foundation of Hangkong [2010ZE56012, 2009ZF56021]
- Open Foundation of Aeronautical Science and Technology Key Laboratory of Aeronautical Test and Evaluation, AVIC
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In many fields the determination of electronic structures of a solid material is a prerequisite in order to investigate its physical/chemical properties as well as related applications. The effect of surface structures and ambient environment on the electronic behavior is of both fundamental and practical significance. In this study, the electron work function (EWF) of Al-Mg alloys is investigated using a scanning Kelvin probe. The results show that the EWF decreases with the increase of surface smoothness, whereas surface oxidation layers would result in the increase of the EWF. Furthermore EWF is strongly dependent on the relative humidity, especially when the relative humidity is higher than 70%, implying that considerable care should be takenon such dependence in order to gain a meaningful parameter for the characterization of surface behavior. (C) 2011 Elsevier B.V. All rights reserved.
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