Magnetotactic bacteria as dispatched oxygen sensors

Author

Martel, Sylvain ; Mohammadi, M. ; de Lanauze, Dominic ; Felfoul, Ouajdi

Author_Institution

Polytech. Montreal, Dept. of Comput. & Software Eng., NanoRobot. Lab. & Inst. of Biomed. Eng., Univ. de Montreal, Montréal, QC, Canada

fYear

2013

fDate

3-5 Dec. 2013

Firstpage

184

Lastpage

187

Abstract

MC-1 Magnetotactic bacteria are considered as self-propelled oxygen sensors with overall sizes of only 1 to 2 μm across. Each cell contains a chain of magnetite nanoparticles that acts like a magnetic nano-compass. Magnetotaxis directional control can be applied from a weak magnetic field to force each cell towards specific areas where oxygen gradient is present. Once at the region under investigation, the directional magnetic field can be reduced to allow the cells to move towards regions of 0.5% oxygen level. A sufficiently high concentration of these cells allows us to visualize with the naked eyes, the low oxygen levels in planar and 3D fluidic environments.

Keywords

gas sensors; magnetic sensors; microorganisms; nanoparticles; nanosensors; 3D fluidic environments; cells visualization; directional magnetic field reduction; dispatched oxygen sensor; magnetic nanocompass; magnetite nanoparticles; magnetotactic bacteria; magnetotaxis directional control; oxygen gradient; self-propelled oxygen sensors; Magnetic domains; Magnetic fields; Magnetic resonance imaging; Magnetic sensors; Microorganisms; Temperature measurement; Magnetotactic bacteria; magnetotaxis; micro-aerophilic responses; self-propelled oxygen sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensing Technology (ICST), 2013 Seventh International Conference on

Conference_Location

Wellington

ISSN

2156-8065

Print_ISBN

978-1-4673-5220-8

Type

conf

DOI

10.1109/ICSensT.2013.6727639

Filename

6727639