کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1676385 1518100 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Field emission properties of carbon nanotubes with different morphologies
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Field emission properties of carbon nanotubes with different morphologies
چکیده انگلیسی

The field emission behavior of base-model well-aligned carbon nanotubes (Base-CNTs), curled carbon nanotubes (Curled-CNTs), and tip-model well-aligned CNTs (Tip-CNTs) was examined. The nanotubes were fabricated by means of direct current plasma-enhanced chemical vapor deposition using different ammonia (NH3) pre-treatment plasma currents. The turn-on electric field values required to obtain a 10-nA current for Base-CNTs, Curled-CNTs, and Tip-CNTs were determined at 3.8, 4.3, and 4.9 V/μm, respectively. The field enhancement factor γ of Base-CNTs, calculated from a Fowler–Nordheim plot, was higher than that for the Curled-CNTs and Tip-CNTs. In the presence of a strong electric field, argon ion irradiation permanently straightened the as-grown Curled-CNTs films. The straightening process enhanced the emission properties of the as-grown Curled-CNTs films by decreasing the turn-on field and increasing the total emission current. Thus, morphology parameters of the MWNTs significantly affect the emission properties of CNTs.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 500, Issues 1–2, 3 April 2006, Pages 124–128
نویسندگان
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