Figure 4From: Multifunctional Magnetic-fluorescent Nanocomposites for Biomedical ApplicationsPreparation of streptavidin-immobilised fluorescent-magnetic nanocomposites; fluorescent microscopy images of nanocomposites excited with a 980 nm laser; (a) image of chain-like structures formed by nanocomposites in the presence of an external flat magnetic field; (b) image of stack-like structures formed by the same nanoparticles in an external needle-like magnetic field. From [28]Back to article page