A magnetic-fluorescent nanocomposite(CDs-MNPs)was synthesized via a facile one-pot microwave hy-drothermal method using polyethyleneimine(PEI)as a bridging agent.PEI connected magnetic nanoparticles(MNPs)and carbon do...A magnetic-fluorescent nanocomposite(CDs-MNPs)was synthesized via a facile one-pot microwave hy-drothermal method using polyethyleneimine(PEI)as a bridging agent.PEI connected magnetic nanoparticles(MNPs)and carbon dots(CDs),forming a fluffy clustered structure with nanoscale gaps,which effectively sup⁃pressed aggregation-induced photoluminescence quenching(AIQ).CDs-MNPs exhibited a saturation magnetization of 10.4 emu/g and stable solid-state green fluorescence.Benefiting from integrated magnetism,fluorescence,and strong adsorption to fingerprint residues,it achieved clear latent fingerprint(LFP)visualization on dark substrates.展开更多
摘要A magnetic-fluorescent nanocomposite(CDs-MNPs)was synthesized via a facile one-pot microwave hy-drothermal method using polyethyleneimine(PEI)as a bridging agent.PEI connected magnetic nanoparticles(MNPs)and carbon dots(CDs),forming a fluffy clustered structure with nanoscale gaps,which effectively sup⁃pressed aggregation-induced photoluminescence quenching(AIQ).CDs-MNPs exhibited a saturation magnetization of 10.4 emu/g and stable solid-state green fluorescence.Benefiting from integrated magnetism,fluorescence,and strong adsorption to fingerprint residues,it achieved clear latent fingerprint(LFP)visualization on dark substrates.