Photosynthetic microorganism-mediated synthesis of akaganeite (beta-FeOOH) nanorods.
Common Anabaena and Calothrix cyanobacteria and Klebsormidium green algae are shown to form intracellularly akaganeite beta-FeOOH nanorods of well-controlled size and unusual morphology at room temperature. X-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy X-ray energy dispersive spectrometry (SEM-EDS) analyses are used to investigate particle structure, size, and morphology. A mechanism involving iron-siderophore complex formation is proposed and compared with iron biomineralization in magnetotactic bacteria.
Brayner
Roberta
R
Universite Paris Diderot (Paris 7), CNRS, UMR 7086, Interfaces, Traitements, Organisation et Dynamique des Systemes (ITODYS), F-75205 Paris Cedex 13, France. roberta.brayner@uni-paris-diderot.fr
Yéprémian
Claude
C
Djediat
Chakib
C
Coradin
Thibaud
T
Herbst
Fréderic
F
Livage
Jacques
J
Fiévet
Fernand
F
Couté
Alain
A
D017033:Anabaena / Q000378:metabolism; D056890:Eukaryota / Q000378:metabolism*; D005290:Ferric Compounds / Q000737:chemistry*; D007477:Ions; D007501:Iron; D046529:Microscopy, Electron, Transmission / Q000379:methods; D008954:Models, Biological; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry*; D010788:Photosynthesis; D013052:Spectrometry, X-Ray Emission / Q000379:methods; D013997:Time Factors; D014961:X-Ray Diffraction
D005290:Ferric Compounds; D007477:Ions; C473845:akaganeite; D007501:Iron