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Effects of substrate curvature on the adsorption of poly(3-hexylthiophene) on single-walled carbon nanotubes
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View: Figures


Image of FIG. 1.
FIG. 1.

Left: Series of STM images of drop cast P3HT film on HOPG. Right: Line profiles along the solid white lines in each corresponding image, showing the film height variation. (a) Monolayer P3HT film showing the interdigitated P3HT structure. 1 and 2 are 60° and 120° folding chains, respectively. Inset: Drawing of the interdigitated structure showing , the chain-chain distance. From the line profile (right) . (b) Thick polymer layer showing chains and fold of polymer chains (boxed region) appearing on the left of a thick island. ; . The line profile of the transition shows that the island sits approximately 2 nm above the bottom layer. (c) Thick P3HT coating showing also a bare surface region. ; . The total thickness of coating measured from the line profile is about 4 nm.

Image of FIG. 2.
FIG. 2.

(a) STM image of cast film shows an abundance of nanotubes dispersed throughout the polymer matrix; ; . (b) A close view of this nanotube reveals an ordered pattern on the tube body, along with a short tube of about 30 nm; ; . (c) Zoom-in of the short nanotube in (b) with cross sections: The repeat distance along the SWNT long axis is 1.66 nm; the measured height is 2.5 nm, corresponding to the tube diameter plus the polymer thickness.

Image of FIG. 3.
FIG. 3.

(a) STM image of a rrP3HT-coated SWNT. (b) Zoom-in of the boxed area. The chiral angle of the polymer wrapping with respect to the nanotube long axis is 48° as indicated in (b). STM settings: ; . (c) Sketch of P3HT wrapping around a nanotube.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effects of substrate curvature on the adsorption of poly(3-hexylthiophene) on single-walled carbon nanotubes