کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5363305 1388299 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pitfalls in measuring work function using photoelectron spectroscopy
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Pitfalls in measuring work function using photoelectron spectroscopy
چکیده انگلیسی

Accurate measurement of work function is essential in many areas of research and development. Despite the importance of photoelectron spectroscopy as a technique for measuring work function, there has been relatively little discussion in the literature of how to conduct accurate measurements. We review the basic technique of measuring work function using ultraviolet photoelectron spectroscopy and discuss several common sources of error related to the experimental setup. In particular, the sample-detector geometry is found to be a key experimental parameter; accurate results are only obtained when the sample is perpendicular to the electron detector. In addition, we demonstrate that photoelectron work function values correspond to the minimum work function “patch” on a non-uniform surface, in contrast to the average work function measured by other techniques, such as the Kelvin probe method.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 256, Issue 8, 1 February 2010, Pages 2602-2605
نویسندگان
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