2015-05-042015-05-042010-03-23Weisman, R. Bruce, Bachilo, Sergei M. and Booth, Eric Christopher, "Fluorescent security ink using carbon nanotubes." Patent US7682523B2. issued 2010-03-23. Retrieved from <a href="https://hdl.handle.net/1911/80013">https://hdl.handle.net/1911/80013</a>.https://hdl.handle.net/1911/80013The present invention is directed toward fluorescent inks and markers comprising carbon nanotubes. The present invention is also directed toward methods of making such inks and markers and to methods of using such inks and markers, especially for security applications (e.g., anti-counterfeiting). Such inks and markers rely on the unique fluorescent properties of semiconducting carbon nanotubes.14 ppengUtility patentUS7682523B2