Probe diffusion in gels

Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

Volumn 53, Issue 2, 1996, Pages 1823-1827

  Ben Naim, E ^b,c   Grest, G S ^b,c   Witten, T A ^b,c   Baljon, A R C ^b,c  

^a MIE UNIVERSITY   (Japan)

^b KYOTO UNIVERSITY   (Japan)

^c HOKKAIDO UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0343215735     PISSN: 1063651X     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevE.53.1823     Document Type: Article

References (18)

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13. The mesh size of poly(acrylamide) gel can be estimated from the slope of the straight line in Fig. 4, slope =-0.243, by a simple calculation. The prefactor of the scaling variable x is assumed to be -(4/3 π ρ NA) -1/3 ξ0-1 log10(e) for the spherical probe molecule of density rho. Here, NA represents Avogadro's number. Assuming ρ approx 0.7, the correlation length ξ0 is obtained to be 1.5 Å. The mesh size of 2.5% poly(acrylamide) gel is then calculated to be about 23 Å from Eq. (6), which is comparable to 11 Å found in the dynamic light scattering studies by T. Tanaka, Phys. Rev. A 17, 763 (1978).
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