Ferrite plating: a chemical method preparing oxide magnetic films at 24–100°C, and its applications

The Terminal Oxidase cbb 3 Functions in Redox Control of Magnetite Biomineralization in Magnetospirillum gryphiswaldense

“…The synthesis of the mixed-valence iron oxide magnetite [FeII(FeIII) 2 O 4 ] was previously proposed to proceed by coprecipitation of balanced amounts of ferrous and ferric iron, which thus requires a precise biological regulation of intracellular redox conditions (8)(9)(10). In inorganic synthesis of magnetite films called ferrite plating, nitrite and oxygen have been shown to be potent oxidants for ferrous iron (11). One of the major redox pathways in microaerophilic MSR-1 was found to be denitrification, which is a respiratory process to stepwise reduce nitrate to N 2 (12).…”

Cytochrome cd1 Nitrite Reductase NirS Is Involved in Anaerobic Magnetite Biomineralization in Magnetospirillum gryphiswaldense and Requires NirN for Proper d1 Heme Assembly

“…Taken together, these findings suggest that the impaired magnetite synthesis in the ⌬nirS mutant is likely a consequence of decreased oxidation of ferrous iron, which in the WT takes places in the periplasm with nitrite as electron acceptor catalyzed by NirS. On the other hand, ferrous iron can also be chemically oxidized with nitrite (35,38), and nitrite and oxygen are potent oxidants for ferrous iron also in ferrite plating, a chemical method for the preparation of magnetite films (39). Therefore, magnetite biomineralization might be favored by combined abiogenic oxidation and bioenzymatic catalysis.…”

Chemical Bath Deposition

“…An example is ferrite plating [20,21], which was developed by Abe and co-workers to deposit films of iron-containing magnetic oxides (ferrites). They reported depositing a wide variety of spinel ferrites (such as (…”