Preparation and Protein Detection of Zn−Ferrite Film with Magnetic and Photoluminescence Properties

Abstract

Zn-ferrite film with hierachical structure and organic composite was prepared by the coprecipitation method, which has good ferromagnetism and photoluminescence (PL) properties. DMSA-modified Fe 3 O 4 nanoparticles (NPs) with saturation magnetization of 55.6 emu/g were prepared by the one-step process, and bovine serum albumin (BSA) with different concentrations was bound on NPs by the carbodiimide method. After Fe 3 O 4 -BSA NPs had been adsorbed onto Zn-ferrite film by magnetic forces, the PL intensity of the films was seen to increase linearly with BSA concentration in the range of 0.25-1.5 mg/mL, suggesting that the films could be used for protein detection.

Annealing Effects on Semitransparent and Ferromagnetic ZnFe2O4 Nanostructured Films by Sol–Gel

“…Thus, particular attention has been paid to the ways of synthesis. Numerous methods have been reported to prepare ZnFe 2 O 4 films or nanoparticles, such as sputtering, 26,27 pulsed laser deposition, 8,22 spray pyrolysis, 21 coprecipitation, 25,28 microwave‐hydrothermal treatment, 29 and mechanical milling 15 . Ayyappan et al 25 .…”

Metal Ion Sensing and Electrochemical Behavior of MOF Derived ZnCo2O4

“…Aqueous suspension of ZnCo 2 O 4 exhibits strong emission at 391 nm upon excitation at 310 nm (Figure ). The emission observed at 391 nm can be ascribed to the excitonic recombination corresponding to the near band edge emission . To explore the potentiality of the nano‐sized ZnCo 2 O 4 for the detection of trace amount of metal ions, luminescence‐based titration were performed with the cumulative addition of analytes (metal ions) to the aqueous suspension of ZnCo 2 O 4.…”

Mechanism of Fluorescence Enhancement of Biosynthesized XFe2O4–BiFeO3 (X = Cr, Mn, Co, or Ni) Membranes

“…4a). The peak T 2g (2.8 eV) corresponds mainly to the electronic transition from octahedral O–2p valence band to Fe-3d high-energy conduction band in BFO (or X–p (or d) in XFO) [27]. The peak e g (6.8 eV) is ascribed to the electronic transition from O–2p to X–2p in tetrahedron of XFO.…”