کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
703113 891127 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spectroscopic studies of nanocrystalline diamond materials
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Spectroscopic studies of nanocrystalline diamond materials
چکیده انگلیسی

The structural and electronic properties of nanocrystalline diamond films synthesized by a modified hot-filament chemical vapour deposition process were investigated by both bulk- and surface-sensitive techniques. Diffraction and microscopy data show the films to consist of diamond grains with an average crystallite size of about 10–15 nm and a root-mean-square roughness of similar size. Carbon core-level excitations in transmission electron energy-loss spectroscopy reveal an sp2 content below 5%. The low energy loss spectra are quite similar to that of diamond crystal. The high sp3 content in the films was also confirmed by C 1s photoelectron plasmon energy loss features in X-ray photoemission experiments and by X-ray excited Auger-electron spectroscopy. We find that the hydrogen covered diamond surface gets contaminated after storage for several months under ambient conditions. Heating up to 500 °C in vacuo is required to desorb the adsorbate layer.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Diamond and Related Materials - Volume 16, Issue 8, August 2007, Pages 1463–1470
نویسندگان
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