کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1547114 997629 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multi-wall carbon nanotubes: Purification, morphology and field emission performance
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Multi-wall carbon nanotubes: Purification, morphology and field emission performance
چکیده انگلیسی

Highly pure multi-wall carbon nanotubes (MWNTs) were successfully fabricated using an acidic purification process. Treatment with acids, concentrated sulfuric acid (H2SO4) and nitric acid (HNO3) eliminated many of the metal catalysts and impurities from MWNTs. The concentration of H2SO4/HNO3 solution and the purification time were optimized. Experimental data demonstrate that a 1:3 concentrated H2SO4:HNO3 solution after 20 h yields highly pure MWNTs. MWNTs were closed tips that are opened after purification. The intensity ratio of the D band to the G band (ID/IG) is as low as 0.27. The field emission current density is as high as 170 μA/cm2 at an electric field of 1.9 V/μm.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 40, Issue 7, May 2008, Pages 2322–2326
نویسندگان
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