Filters??? No, but fibers yes. And I don't know a ton about them, I just know that they are strong, lightweight, and have lots of theoritical uses, like for lightweight cars of the future. Computer chips that are way more powerful than the traditional photomask and semiconductor wafer.
Carbon Nanotube fibers are strong, lightweight and can conduct more electricity than copper. http://news.rice.edu/2014/02/13/rices-carbon-nanotube-fibers-outperform-copper-2/ http://youtu.be/4XDJC64tDR0