کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1419433 986041 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Aligned carbon nanotubes by catalytic decomposition of C2H2 over Ni–Cr alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Aligned carbon nanotubes by catalytic decomposition of C2H2 over Ni–Cr alloy
چکیده انگلیسی

High density, well-aligned carbon nanotubes (CNTs) were prepared by thermally decomposing acetylene at 700 °C with the help of Ni–Cr alloy as catalyst in a thermal chemical vapor deposition system. The density and alignment of CNTs were characterized by scanning electron microscope (SEM). It was found that the density of the CNTs could be remarkably increased and the alignment could be improved with the decrease of the thickness ratio of Ni:Cr. Also found in our experiment was that the catalyst encapsulated in CNT was single crystal Ni, which was confirmed by high-resolution transmission electron microscopy (HRTEM) and electron dispersion X-ray spectrum (EDX). Finally, the growth mode of CNTs was discussed based on the Ni–Cr alloy catalysts under our experimental conditions. The results are helpful in providing a better understanding of the acting of catalyst and the controlling of the desirable density and alignment of CNTs for various applications.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 43, Issue 15, December 2005, Pages 3172–3177
نویسندگان
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