کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10610900 986027 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In-situ studies of electron field emission of single carbon nanotubes inside the TEM
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
In-situ studies of electron field emission of single carbon nanotubes inside the TEM
چکیده انگلیسی
Electron field emission characteristics of individual multi-walled carbon nanotubes (MWCNTs) were investigated in situ inside the transmission electron microscope (TEM). For a single MWCNT it was found that while field-emission can hardly occur from the side of the nanotube, a curved nanotube may result in finite side emission and the best emission geometry is the top emission geometry. Current-voltage (I-V) measurements made at different vacuum conditions and voltage sweeps emphasize the importance of the adsorbates on the electron field emission of MWCNTs. For a contaminated MWCNT, although the field emission current was reduced, the stability of its emission was improved. A current of up to several tens of μA was observed for a single MWCNT, but it was found that long time emission usually results in drastic structure damage that may lead to sudden emission failure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 43, Issue 5, 2005, Pages 1026-1031
نویسندگان
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