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Magneto-mechanic model of the magnetotactic bacteria. Applications in the microactuator field

M. IGNAT1,* , G. ZARNESCU1, S. SOLDAN1, I. ARDELEAN2, C. MOISESCU2

Affiliation

  1. INCDIE CA - Dep.1/10, Romania
  2. Institute of Biology, Romanian Academy, Centre of Microbiology, Romania

Abstract

The specific structural characteristic of magnetotactic bacteria (MTB) is the presence inside the cell of particles named magnetosomes which are magnetic nano-crystals [Balkwill et al. 1980]. Their specific functional characteristic is magnetotaxis, the orientation along the Earth`s geomagnetic field lines. Magnetosomes are defined as intracellular, magnetic single-domain crystals of a magnetic iron mineral that are enveloped by a membrane In many MTB strains the iron mineral particle consist of magnetite, Fe3O4, whereas in several MTB from marine, sulfidic environments, the iron mineral particle consist of greigite, Fe3S4.The size of magnetite crystals found in different strains is between 35-120nm.The paper includes the comentaries about the geometric model.There are also proposed two new applications and the authors present the structures of a news microactuators or manipulators) the control of the optically medium specific parameters with magnetic field and ii) the motion control of nanomagneto-manipulators driven by magnetic field..

Keywords

Magnetotactic bacteria, Nano-crystals, Microactuator field.

Submitted at: Jan. 25, 2007
Accepted at: April 15, 2007

Citation

M. IGNAT, G. ZARNESCU, S. SOLDAN, I. ARDELEAN, C. MOISESCU, Magneto-mechanic model of the magnetotactic bacteria. Applications in the microactuator field, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 4, pp. 1169-1171 (2007)