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PREPARATION OF WAFER-SCALE FILMS OF ALIGNED CARBON NANOTUBES BY VACUUM FILTRATION

United States Patent Application

20170096339
A1
View the Complete Application at the US Patent & Trademark Office
A method for preparing a film of aligned rod-like nanostructures or nanotubes comprises preparing a solution that comprises rod-like nanostructures or nanotubes, wherein the rod-like nanostructures or the nanotubes are well-dispersed, and performing vacuum filtration of the solution through a filtration membrane, wherein the vacuum filtration produces a film on the filtration membrane where the rod-like nanostructures or the nanotubes are aligned. The well-dispersed individual rod-like nanostructures or nanotubes may be separately suspended in the solution. The concentration of rod-like nanostructures or nanotubes may be below a threshold value and/or the filtration speed may be as slow as possible. Where a surfactant is utilized to aid dispersion, the surfactant concentration may be below a critical micelle concentration (CMC).
He, Xiaowei (Wanzhou District, CN), Gao, Weilu (Rong Jing Sheng Yuan, CN), Kono, Junichiro (Houston, TX)
William Marsh Rice University (Houston TX)
15/ 278,430
September 28, 2016
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH [0002] This invention was made with government support under Grant No. DE-FG02-06ER46308 awarded by the U.S. Department of Energy. The government has certain rights in the invention.