Long Magnetic Nanochains Assembled by Magnetotactic Bacteria in a Directional Field

X.L. Wu; W. Zhong; Shy Ying Gao; X.H. Qi; N.J. Tang; H.Y. Jiang; You Wei Du

doi:10.4028/www.scientific.net/MSF.475-479.2411

Paper Titles

Study on Adhesion and Biocompatibility of Copolymer of MMA-BMA-MAA for Coronary Stents Coatings
p.2395

Study on the Shape Memory Behavior of Poly (L-Lactide)
p.2399

Particle Size Reduction of Biomaterials Using Cryogenic Milling Process
p.2403

Influence of Bone Structure on Mechanical Properties of Bovine and Swine Compact Bones
p.2407

Long Magnetic Nanochains Assembled by Magnetotactic Bacteria in a Directional Field
p.2411

Response of Human Osteoblast-Like Cells and Fibroblasts to Titanium Alloy Nitrided under Glow Discharge Conditions
p.2415

The Study of Apoptosis and Phagocytosis of Rabbit Synoviocytes Induced by Particulate Joint Replacement Materials
p.2419

Study of Nano-Hydroxyapatite on the Remineralization of Dismineralized Teeth
p.2423

Study on the Subsonic Thermal Sprayed Ti/Bioglass Composite Coatings on Titanium Alloy
p.2427

HomeMaterials Science ForumMaterials Science Forum Vols. 475-479Long Magnetic Nanochains Assembled by...

Long Magnetic Nanochains Assembled by Magnetotactic Bacteria in a Directional Field

Abstract:

A new species of single-cell magnetotactic bacteria, the NMV-1 bacteria, has been found by us. Each NMV-1 bacterium synthesizes itself a chain of magnetic nanoparticles inside its body. When an external magnetic field is applied, long bacteria chains come into being in the direction of the field in the water. More than 30 µm long chains of live bacteria have been observed. Length of bacteria chains is field dependant: the higher the magnetic field is, the longer the bacteria chains are. The bacteria chains orientation is controllable and the chains can be stably trapped. The mechanism of the assembly of long bacteria chains is also discussed. The results show that, while an external magnetic field is applied, the NMV-1 bacteria have strong enough interactions between each other to assemble long bacteria chains. After positioning the bacteria chain, cellular membranes of the bacteria were removed by cell lysis, leaving long chains of magnetic nanoparticles on a substrate. These magnetic nanochains can be potentially used as building blocks for magnetic nanostructures.