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Conductivity scaling with bundle length and diameter in single walled carbon nanotube networks
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Effects of sonication on SWNT bundle length and diameter. [(a) and (b)] AFM image of SWNTs absorbed on a silicon wafer after (a) and (b) of sonication time. (c) Histogram of bundle length distribution taken from several AFM images for (black) and (red) of sonication. Plot of the (d) average bundle diameter and (e) average bundle length for various sonication times measured from AFM images.

Image of FIG. 2.
FIG. 2.

(Color online) DC conductivity of SWNT networks vs average bundle length in the network. Data are fit to a power law, with . Data for length tube (triangle) is excluded from the fit because of the larger bundle diameter for that data point.

Image of FIG. 3.
FIG. 3.

(Color online) Qualitative argument for the dependence of the dc conductivity of SWNT networks on the average bundle length and diameter. (a) Longer tubes lead to fewer junctions to cross the surface, which leads to higher conductivity. NT-NT junctions are circled. (b) Larger bundles lead to lower conductivity as for stiff bundles where is independent of the bundle diameter.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Conductivity scaling with bundle length and diameter in single walled carbon nanotube networks