کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
702417 1460806 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transport properties of hydrogen-terminated nanocrystalline diamond films
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Transport properties of hydrogen-terminated nanocrystalline diamond films
چکیده انگلیسی

Hydrogen-terminated nanocrystalline diamond films of different granularity are investigated by van der Pauw measurement of the resistivity and Hall effect depending on the grain size. In agreement with the observation on the hydrogenated diamond single crystals, the measured transport quantities are surface related. The room temperature resistivity strongly increases when the mean grain size at surface varies from about 400 nm down to 40 nm while the Hall concentration is only weakly dependent on the granularity and exhibits values comparable with those found in hydrogenated single crystals. Using a two-dimensional geometrical model, we show that effective resistivity is controlled by the transversal resistance of the grain boundaries. Based on the mobility–concentration relation obtained by the surface adsorbate desorption, microscopic origin of the boundary resistance is discussed.


► Grain size dependence of transport in hydrogen-terminated nanocrystalline diamond.
► Resistance increases with diminishing grains, concentration like in single crystals.
► Effective resistivity given by transversal resistance of the grain boundaries.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Diamond and Related Materials - Volume 24, April 2012, Pages 63–68
نویسندگان
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