Copper nanocones grown in polymer ion-track membranes as field emittersP. Serbun, F. Jordan, A. Navitski, G. Müller, I. Alber, M.E. Toimil-Molares and C. TrautmannEur. Phys. J. Appl. Phys., 58 1 (2012) 10402DOI: https://doi.org/10.1051/epjap/2012110473