کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1416080 | 985942 | 2011 | 8 صفحه PDF | دانلود رایگان |
Carbon nanoscrolls, made of rolled up graphene, are expected to show unique electronic properties different from those of nested multi-wall tubes. Here we report in situ TEM observations and electrical measurements of the transport and breakdown behaviour of catalytically grown, multi-turn monochiral graphene scrolls, 30–65 nm in outer diameter. Generally, the low-bias IV region proved strictly linear Ohmic behaviour, non-linear increase in conductance occurred beyond an applied voltage of ∼0.4 V. Excellent maximum conductance values up to G ∼ 63 G0 and sustainable current-carrying capacities up to J = 8.5 × 108 A/cm2 were found in the most successful samples right before electric breakdown. Inferior values are ascribed to defect-rich or semiconducting scrolls. This study emphasizes the promising nature of carbon nanoscrolls for a number of electronic device applications.
Journal: Carbon - Volume 49, Issue 6, May 2011, Pages 1821–1828