Persistence of copper-based nanoparticle-containing foliar sprays in Lactuca sativa (lettuce) characterized by spICP-MS. - Laughton, Stephanie; Laycock, Adam; von der Kammer, Frank; Hofmann, Thilo; Casman, Elizabeth A.; Rodrigues, Sónia M.; Lowry, Gregory V. (Journal of Nanoparticle Research, 2019)