Viscoelasticity of the bacteriophage Pf1 network measured by magnetic microrheology

K. Ērglis¹ - V. Ose² - A. Zeltins² - A. Cēbers³

¹ University of Latvia, 8 Zellu, Riga, LV-1002, Latvia
² Biomedical Research and Study Centre of Latvia, 1 Ratsupites, Riga, LV-1067, Latvia
³ Institute of Physics, University of Latvia, Salaspils, LV-2169, Latvia

Abstract
Chains of superparamagnetic particles linked by DNA are used as probes to investigate the viscoelasticity of bacteriophage Pf1 networks in the range of concentrations 0--2.5 mg/ml. The loss and storage moduli are obtained by video tracking of the chain in an AC magnetic field applied perpendicularly to the steady field and by determining the amplitude and phase lag of the filament oscillations. The obtained results show the power law dependencies of the storage and loss moduli on the frequency. Figs 6, Refs 19.