la9010345_si_001.pdf (1.67 MB)
Download file

Photosynthetic Microorganism-Mediated Synthesis of Akaganeite (β-FeOOH) Nanorods

Download (1.67 MB)
journal contribution
posted on 2009-09-01, 00:00 authored by Roberta Brayner, Claude Yéprémian, Chakib Djediat, Thibaud Coradin, Fréderic Herbst, Jacques Livage, Fernand Fiévet, Alain Couté
Common Anabaena and Calothrix cyanobacteria and Klebsormidium green algae are shown to form intracellularly akaganeite β-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.