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Local viscoelasticity of biopolymer solutions

Publication ,  Conference
Schnurr, B; Gittes, F; Olmsted, PD; Schmidt, CF; Mackintosh, FC
Published in: Materials Research Society Symposium - Proceedings
January 1, 1997

We describe a new, high-resolution technique for determining the local viscoelastic response of polymer gels on a micrometer scale. This is done by monitoring thermal fluctuations of embedded probe particles. We derive the relationship between the amplitude of fluctuations and the low-frequency storage modulus G′, as well as the relationship between the fluctuation power spectrum, measured between 0.1 Hz and 25kHz, and the complex shear modulus G(ω). For both, semiflexible F-actin solutions and flexible polyacrylamide (PAAm) gels we observe high-frequency power-law dependence in the spectra, which reflects the behavior of the shear modulus. However, we observe distinctly different scaling exponents for G(ω) in F-actin and PAAm gels - presumably due to the semiflexible nature of the actin filaments.

Duke Scholars

Published In

Materials Research Society Symposium - Proceedings

ISSN

0272-9172

Publication Date

January 1, 1997

Volume

463

Start / End Page

15 / 20
 

Citation

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Schnurr, B., Gittes, F., Olmsted, P. D., Schmidt, C. F., & Mackintosh, F. C. (1997). Local viscoelasticity of biopolymer solutions. In Materials Research Society Symposium - Proceedings (Vol. 463, pp. 15–20).
Schnurr, B., F. Gittes, P. D. Olmsted, C. F. Schmidt, and F. C. Mackintosh. “Local viscoelasticity of biopolymer solutions.” In Materials Research Society Symposium - Proceedings, 463:15–20, 1997.
Schnurr B, Gittes F, Olmsted PD, Schmidt CF, Mackintosh FC. Local viscoelasticity of biopolymer solutions. In: Materials Research Society Symposium - Proceedings. 1997. p. 15–20.
Schnurr, B., et al. “Local viscoelasticity of biopolymer solutions.” Materials Research Society Symposium - Proceedings, vol. 463, 1997, pp. 15–20.
Schnurr B, Gittes F, Olmsted PD, Schmidt CF, Mackintosh FC. Local viscoelasticity of biopolymer solutions. Materials Research Society Symposium - Proceedings. 1997. p. 15–20.

Published In

Materials Research Society Symposium - Proceedings

ISSN

0272-9172

Publication Date

January 1, 1997

Volume

463

Start / End Page

15 / 20