کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5397167 1392322 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Controlled surface neutralization: A quantitative approach to study surface charging in photoemission
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Controlled surface neutralization: A quantitative approach to study surface charging in photoemission
چکیده انگلیسی
Photons when used to probe poorly conducting materials induce emission of secondary electrons that are inadequately compensated from the sample ground giving rise to a phenomenon commonly known as sample charging. In case of photoemission spectroscopy of an insulating material the data obtained from the charged surface are accordingly distorted. Here we have used a controlled neutralization technique to obtain photoemission data from continuously varying equilibrium charging conditions from two dissimilar insulating polymeric systems. A quantitative scheme for data analysis has been developed to demonstrate systematic behavior in the apparently distorted spectra and the charging peak shift has been described by an effective model. It is shown that the neutralization responses are non-linear for both the systems and possess intrinsic similarity. Around a critical electron flux the neutralization of the samples appears to occur through the percolation of homogeneously dispersed surface domains.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 154, Issue 3, February 2007, Pages 90-95
نویسندگان
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