Analysis of the linear viscoelasticity of polyelectrolytes by magnetic microrheometry—Pulsed creep experiments and the one particle response

We report experimental measurements on polyacrylamide (flexible polyelectrolytes), actin (semi-flexible polyelectrolytes), and self-assembled peptide (gelled semi-flexible polyelectrolytes) solutions. The measurements were obtained using a two-pole piece magnetic microrheometer based on an upright O...

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Bibliographic Details
Published in:Journal of rheology (New York : 1978) 2010-01, Vol.54 (1), p.117-131
Main Authors: Tassieri, M., Waigh, T. A., Trinick, John, Aggeli, Amalia, Evans, R. M. L.
Format: Article
Language:English
Subjects:
Actin
Cross-disciplinary physics: materials science
rheology
Deformation
material flow
Exact sciences and technology
Linear viscoelasticity
Magnetic
Microrheology
Peptide
Physics
Polyelectrolyte
Rheology
Scaling
Techniques and apparatus
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Summary:We report experimental measurements on polyacrylamide (flexible polyelectrolytes), actin (semi-flexible polyelectrolytes), and self-assembled peptide (gelled semi-flexible polyelectrolytes) solutions. The measurements were obtained using a two-pole piece magnetic microrheometer based on an upright Olympus microscope with an oil immersion ( × 100 ) lens. Pulsed creep experiments produced high quality data over a wide time range with good agreement between passive particle tracking and magnetic microrheology results. This implies a commonality of the one probe particle response to its viscoelastic environment in both passive and active microrheology experiments.
ISSN:0148-6055
1520-8516
DOI:10.1122/1.3266946