کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1814073 1025644 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High-field electron emission of carbon nanotubes grown on carbon fibers
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
High-field electron emission of carbon nanotubes grown on carbon fibers
چکیده انگلیسی
Carbon nanotubes with uniform density were synthesized on carbon fiber substrate by the floating catalyst method. The morphology and microstructure were characterized by scanning electron microscopy and Raman spectroscopy. The results of field emission showed that the emission current density of carbon nanotubes/carbon fibers was 10 μA/cm2 and 1 mA/cm2 at the field of 1.25 and 2.25 V/μm, respectively, and the emission current density could be 10 and 81.2 mA/cm2 with the field of 4.5 and 7 V/μm, respectively. Using uniform and sparse density distribution of carbon nanotubes on carbon fiber substrate, the tip predominance of carbon nanotubes can be exerted, and simultaneously the effect of screening between adjacent carbon nanotubes on field emission performance can also be effectively decreased. Therefore, the carbon nanotubes/carbon fibers composite should be a good candidate for a cold cathode material.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 403, Issue 17, 1 August 2008, Pages 2662-2665
نویسندگان
, , , , , , ,