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Processing of Thin Carbon Nanotube-Polyimide Composite Membranes

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Here we report a straightforward method for fabricating freely suspended, thin, carbon nanotube (CNT) membranes infiltrated with polymers. A CNT film was made by compressing (rolling) vertically aligned carbon nanotubes (VACNTs) on a silicon substrate. A nanotube—polymer composite film was then fabricated by spin casting a polymer layer on top of the flattened CNT film. The composite film was subsequently released from the silicon substrate by dipping in HF solution, resulting in thin, smooth, suspended membranes. To aid in releasing intact, quality films, a mesh frame was adhered to the films prior to release. Characterization of the film and membrane was performed via scanning electron microscopy (SEM) and atomic force microscopy (AFM). This process is a new approach for making thin, reinforced, smooth films or membranes with high concentrations of CNTs, which may lead to higher performance materials.
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Document Type: Short Communication

Publication date: August 1, 2011

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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