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
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله

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 393Â 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 19â20, August 2008, Pages 712-717
Journal: Solid State Ionics - Volume 179, Issues 19â20, August 2008, Pages 712-717
نویسندگان
Lijuan Chen, Liping Li, Guangshe Li,