کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1297248 1498372 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Surface hydration-mediated conduction of NiO nanocrystals
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Surface hydration-mediated conduction of NiO nanocrystals
چکیده انگلیسی
In this work, we initiated an investigation on the conduction behavior of NiO nanocrystals. All as-prepared NiO nanocrystals were terminated with hydration layers at ambient conditions. With increasing the temperature up to 393 K, the hydration layers of NiO nanocrystals decreased. Alternative current and direct current conductivity measurements coupled with thermogravimetric analysis confirmed that there exists proton conduction in the surface hydration layers and hole conduction in the bulk for small particle sizes of NiO nanocrystals. The removal of hydration layers from the NiO surfaces gave rise to a reduction in the bulk and grain boundary conductivities. With increasing the particle size, the bulk conduction showed an activation energy minimum, which was interpreted in terms of variations of charge carrier concentration and the hopping distance between the charge carriers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 179, Issues 19–20, August 2008, Pages 712-717
نویسندگان
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