A novel lateral flow immunoassay strip based on a label-free magnetic Fe₃O₄@UiO-66-NH₂ nanocomposite for rapid detection of Listeria monocytogenes

Abstract

Listeria monocytogenes (L. monocytogenes) is one of the most lethal pathogenic bacteria. Although traditional microbial culture method has high sensitivity and selectivity for the diagnosis of L. monocytogenes, it is...

Synthesis of magnetic UiO-66-NH2@EDTA-GO and mechanism study of simultaneous adsorption of Pb(ii) and organic dyes from water

“…Additionally, all characteristic peaks of Fe 3 O 4 and UiO-66-NH 2 are present in Fe 3 O 4 /UiO-66-NH 2 , indicating that the crystal structures of UiO-66-NH 2 and Fe 3 O 4 are well-preserved during the composite process. 59 A clear diffraction peak of GO is detected at 2θ = 11.22°, and a broad and diffuse peak is detected at 2θ = 10.48°after the organic ligand EDTA modification. As an organic ligand containing many carboxyl and amino groups, EDTA has strong coordination and affinity, can undergo an esterification reaction with the hydroxyl groups on the GO surface, and tightly covers the GO surface, which may change the lattice constant and crystal structure of GO and generate more amorphous structures, causing the shift and intensity change of diffraction peaks, indicating that EDTA is successfully connected to the surface of GO.…”