We report the surface modification of microscopic
live multicellular nematodes Caenorhabtidis elegans with polyelec-
trolyte multilayers(pure and doped with 20 nm gold nanoparticles)
and the direct magnetic functionalization of nematodes with
biocompatible magnetic nanoparticles. Magnetically functionalized
“ironoxideclad” nematodes can be effectively separated and moved
using an external magneticfield. The surface-functionalized nematodes
preserve their viability and reproduction.