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Scattering properties of agarose gels
Author(s) -
Rochas Cyrille,
Hecht AnneMarie,
Geissler Erik
Publication year - 1999
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19991380120
Subject(s) - agarose , materials science , scattering , chemical engineering , chemistry , chromatography , optics , physics , engineering
Static light scattering and small angle neutron scattering measurements are reported for agarose hydrogels prepared under various conditions of concentration and temperature. For the wide range of transfer wave vector explored, these measurements show that the gels do not display fractal behaviour. Their structure is better described by a stretched exponential form, in which the value of the exponent is n = 0.2. As found by other authors, a maximum in the scattering intensity is observed in the light scattering spectra. The position of the maximum, q max , depends on the concentration and on the thermal history of the sample. The inverse length 1/q max is in good agreement with published measurements of the pore size D in this system. Preliminary measurements by small angle scattering indicate that the sol‐gel transition is not of spinodal type.