Journal
INORGANIC CHEMISTRY
Volume 44, Issue 9, Pages 3203-3209Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic048819r
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Nanoparticles of ion phosphate, iron arsenate, iron molybdate, and iron vanadate were synthesized within the 8 nm interior of ferritin. The synthesis involved reacting Fe(II) with ferritin in a buffered solution at pH 7.4 in the presence of phosphate, arsenate, vanadate, or molybdate. O-2 was used as the oxidant to deposit the Fe(Ill) mineral inside ferritin. The rate of iron incorporation into ferritin was stimulated when oxo-anions were present. The simultaneous deposition of both iron and the oxo-anion was confirmed by elemental analysis and energy-dispersive X-ray analysis. The ferritin samples containing iron and one of the oxo-anions possessed different UV/vis spectra depending on the anion used during mineral formation. TEM analysis showed mineral cores with similar to 8 nm mineral particles consistert with the formation of mineral phases inside ferritin.
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