ZnO nanoparticle growth on single-walled carbon nanotubes by atomic layer deposition and a consequent lifetime elongation of nanotube field emission, Yo-Sep Min, Eun Ju Bae, Jong Bong Park, and Un Jeong Kim, Jaewon Song , Cheol Seong Hwang, Noejung Park and Wanjun Park*, Appl. Phys. Lett., 90, p263104 (2007)