Fig. 1From: Bioluminescent magnetic nanoparticles as potential imaging agents for mammalian spermatozoaFTIR spectra for a citric acid-coated magnetic nanoparticles (CA-MNPs), b firefly luciferase (Luc), and c firefly luciferase combined with CA-MNP (Luc + MNPs) confirm the successful surface modification stepsBack to article page