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Buckling-driven delamination of carbon nanotube forests
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View: Figures


Image of FIG. 1.
FIG. 1.

SEM images of the CNT forests base, illustrating permanent deformation after macro-compression. (a) SEM image of an edge region with multiple buckles but no delamination. (b) SEM image of a location illustrating multiple buckles and delamination of CNTs. (c) A magnified view of a region where CNTs buckled and interface delamination occurred.

Image of FIG. 2.
FIG. 2.

SEM micrographs (a–e) and stress-strain data (f) illustrating the deformation of a CNT forest coated with a 1 m Al film that was indented at its edge. Images correspond to points a–e on the indentation stress-strain curve in (f).

Image of FIG. 3.
FIG. 3.

(a) Micrograph from Fig. 2(c) with the addition of a vertical line at the middle of the indenter to guide the eye. The inward arrow (× inside a circle) is the direction of the buckling, (b) illustration of the side view of the out-of-plane deformation of the CNT forest along the vertical line in (a). The left arrow shows the direction of the buckling. (c) Schematic of the bending moment and 2-dimensional stress distribution in an element highlighted in (b). (d) Curvature of the section of CNT forest under the buckle location.

Image of FIG. 4.
FIG. 4.

Post-indentation deformation morphologies on the edge of (a) an uncoated CNT forest and CNT forests coated with (b) 100 nm and (c) 1 m Al films. Scale bar in each image corresponds to 50 m.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Buckling-driven delamination of carbon nanotube forests