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

• Published in: Langmuir Vol. 25; no. 17; pp. 10062 - 10067
• Main Authors: Brayner, Roberta, Yéprémian, Claude, Djediat, Chakib, Coradin, Thibaud, Herbst, Fréderic, Livage, Jacques, Fiévet, Fernand, Couté, Alain
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01.09.2009
• Subjects: Anabaena; Anabaena - metabolism; Biological Interfaces: Biocolloids, Biomolecular and Biomimetic Materials; Calothrix; Chemical Sciences; Chemistry; Colloidal state and disperse state; Cyanobacteria; Eukaryota - metabolism; Exact sciences and technology; Ferric Compounds - chemistry; General and physical chemistry; Inorganic chemistry; Ions; Iron; Klebsormidium; Microscopy, Electron, Transmission - methods; Models, Biological; Models, Chemical; Nanoparticles - chemistry; Nanotechnology - methods; Nanotubes - chemistry; Photosynthesis; Spectrometry, X-Ray Emission - methods; Surface physical chemistry; Time Factors; X-Ray Diffraction; Scanning electron microscopy; Particle size; Transition metal; Iron; X ray; Dispersive spectrometry; X ray diffraction; Mechanism; Transmission electron microscopy; Synthesis; Iron complex; Energy; Morphology; Microorganism; Structure; Room temperature
• ISSN: 0743-7463; 1520-5827
• DOI: 10.1021/la9010345

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.