کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5376601 | 1504328 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
First-principles study of field emission properties of gas adsorption on the carbon nanotubes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Carbon-containing gases usually present when preparing carbon nanotubes, and can affect the field emission of carbon nanotubes. Water vapor is also an important kind of gas for field emission, concerned by both experimental and theoretical studies. Under strong electric field, the gas molecules may be decomposed to radicals. Using DMol3 code based on density-functional theory, we calculated the adsorption of the gas molecules CH4, CO and H2O and the CH3 and OH radicals under emission conditions. We found that the H2O and the methyl have advantages to field emission and the CH4, CO and the hydroxyl have disadvantages. The results of H2O and CO are consistent with experiments, and the enhancement of current by CH4 in the experiment may be due to the methyl decomposed from the CH4.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 330, Issue 3, 21 November 2006, Pages 417-422
Journal: Chemical Physics - Volume 330, Issue 3, 21 November 2006, Pages 417-422
نویسندگان
Zi Li, Chong-Yu Wang,