کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1787368 1023439 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Well-defined single-walled carbon nanotube fibers as quantum wires: Ballistic conduction over micrometer-length scales
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Well-defined single-walled carbon nanotube fibers as quantum wires: Ballistic conduction over micrometer-length scales
چکیده انگلیسی

We report quasi-ballistic conduction in single-walled carbon nanotube (SWNT) fibers at room temperature, with a measured mean free path of 1.0–2.6 μm. The dynamic submersion of vertical SWNT fibers into liquid mercury (Hg) electrode shows plateaus and steps indicative of quasi-ballistic electron transport. This response is described with a newly developed network model that uses surface impurities to simplify the parallel conducting channels. The quasi-ballistic SWNT fibers exhibit a resistance per unit length of 2.5–6.5 kΩ/μm and a mean free path exceeding 1 μm, a length longer than typical via dimensions in existing Si-chip technologies. These results highlight that SWNT fiber conductivity can be enhanced by increasing the metallic to semiconducting SWNT ratio and reducing the surface impurities.


► We deposit SWNTs fibers on a tungsten-tip using dielectrophoresis (DEP) method.
► Quasi-ballistic conduction in the SWNT fibers at room temperature is reported.
► The resulting electrical data are described with a newly developed network model.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 11, Issue 6, November 2011, Pages 1414–1418
نویسندگان
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