Fluorescent enhancement of bio-synthesized X-Zn-ferrite-bismuth ferrite (X = Mg, Mn or Ni) membranes: Experiment and theory.

Large areas of high-photostability fluorescent X-Zn-ferrite (XZn)Fe 2 O 4 (X = Mg, Mn or Ni) nanoparticles embedded in a bismuth ferrite (BiFeO 3 ) membrane were successfully fabricated via a facile bio-approach using Shewanella oneidensis MR-1. The results revealed that the perovskite BiFeO 3 enhances the fluorescent intensity (at 635 and 795 nm) and surface potential difference (14 meV and −40 meV) of the embedded spinel (XZn)Fe 2 O 4 . This mechanism is attributed to the interfacial coupling of the Fe O O Bi and Fe O Fe interfaces. Such a system could open up new ideas in the design of environmentally friendly fluorescent sensors for water environments. [ABSTRACT FROM AUTHOR]