2015-05-042015-05-042012-02-28Hauge, Robert H., Xu, Ya-Qiong, Shan, Hongwei, Nicholas, Nolan Walker, Kim, Myung Jong, Schmidt, Howard K. and Kittrell, Carter W., "Carbon nanotube diameter selection by pretreatment of metal catalysts on surfaces." Patent US8124503B2. issued 2012-02-28. Retrieved from https://hdl.handle.net/1911/80082.https://hdl.handle.net/1911/80082A new and useful nanotube growth substrate conditioning processes is herein disclosed that allows the growth of vertical arrays of carbon nanotubes where the average diameter of the nanotubes can be selected and/or controlled as compared to the prior art.10 ppengUtility patentUS8124503B2