Method for increasing density of aligned carbon nanotubes

摘要

The present application relates to a method of increasing density of aligned carbon nanotubes. Firstly, aligned carbon nanotubes grown on a substrate is transferred to a stretched retractable film. The retractable film is then shrunk along a direction which is perpendicular to the alignment direction of the carbon nanotubes to obtain high density carbon nanotubes. The array of aligned carbon nanotubes is finally transferred from the retractable film to a target substrate. The disclosed method can efficiently obtain high-density high-quality aligned carbon nanotubes at low cost.

主权项

1. A method for increasing density of aligned carbon nanotubes, comprising the following steps:
(a) transferring aligned carbon nanotubes from an initial substrate to a stretched retractable film to obtain a composite structure comprising the aligned carbon nanotubes and the stretched retractable film, wherein the carbon nanotubes are aligned perpendicular to a retracting direction of the retractable film, wherein step (a) further comprises:
coating a polymer transfer material on the aligned carbon nanotubes on the initial substrate;removing the initial substrate to form a composite of the aligned carbon nanotubes and a transfer film made of the polymer transfer material; andattaching the aligned carbon nanotubes in the composite of the aligned carbon nanotubes and the transfer film to the stretched retractable film; (b) shrinking the retractable film in the composite structure along the retracting direction to increase density of the aligned carbon nanotubes; and (c) transferring the aligned carbon nanotubes in the composite structure to a target substrate.