2015-05-042015-05-042013-12-03Hauge, Robert H., Xu, Ya-Qiong and Pheasant, Sean, "Production of single-walled carbon nanotube grids." Patent US8596466B2. issued 2013-12-03. Retrieved from https://hdl.handle.net/1911/80143.https://hdl.handle.net/1911/80143A method of forming a nanotube grid includes placing a plurality of catalyst nanoparticles on a grid framework, contacting the catalyst nanoparticles with a gas mixture that includes hydrogen and a carbon source in a reaction chamber, forming an activated gas from the gas mixture, heating the grid framework and activated gas, and controlling a growth time to generate a single-wall carbon nanotube array radially about the grid framework. A filter membrane may be produced by this method.7 ppengUtility patentUS8596466B2