Elastic properties of bacterial magnetite nanoparticles suspension

A. Józefczak¹ - A. Hashim² - M. Molcan² - T. Hornowski¹ - A. Skumiel¹ - M. Rajnak² - P. Kopčanský² - M. Timko²

¹ Institute of Acoustics, Faculty of Physics, Adam Mickiewicz University, Pozna{ń Poland
² Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia

Abstract
The objective of the work is to study the biological magnetic nanoparticles (magnetosomes) as a product of the biomineralization process of magnetotactic bacteria Magneto\-spirillum sp.AMB-1. This paper presents an ultrasound method based on the measure\-ments of compression wave velocities and determination of the phase velocity of a wave. The obtained data allow determination of the mechanical characteristics of the sus\-pension. The study of elastic properties shows that the bulk modulus of a bacterial mag\-neto\-some suspension increases with the increase of temperature like in a chemically synthesized magnetite nanoparticle suspension. Figs 2, Refs 16.