A method for identification of a sample of a material is disclosed. The method includes illuminating a sample at a plurality of excitation wavelengths, measuring the intensity at each of the plurality of excitation wavelengths, locating the values of maxima in the three-dimensional intensity contour,...http://www.google.com/patents/US7569839?utm_source=gb-gplus-sharePatent US7569839 - Method for classification of carbon nanotubes and other materials
