کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1649914 1007593 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tunable field emission properties of carbon nanotube arrays by engineering Fe catalysts
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Tunable field emission properties of carbon nanotube arrays by engineering Fe catalysts
چکیده انگلیسی

High-quality carbon nanotube (CNT) arrays composed of nanotubes with different diameters and wall numbers were synthesized by water-assisted chemical vapor deposition (CVD) from engineered Fe catalysts. Interestingly, the distribution of nanotube diameter and wall number broadened over 2.5 times as the catalytic Fe thickness increased. The mean diameter and wall number of nanotubes increased monotonically with the Fe thickness, while the calculated CNT area density within an array dropped about 32 times. Field emission measurements revealed that the turn-on voltage for CNT arrays decreased from 3.5 to 2.5 V/µm with the increased catalytic Fe thickness. It was believed that the screening effect from the proximity of neighboring nanotubes has a dominant influence than the CNT diameter on the resulting turn-on voltage.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 63, Issue 29, 15 December 2009, Pages 2556–2559
نویسندگان
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