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Université de Fribourg

Effects of charge double layer and colloidal aggregation on the isotropic-nematic transition of protein fibers in water

Mezzenga, Raffaele ; Jung, Jin-Mi ; Adamcik, Jozef

In: Langmuir, 2010, vol. 26, no. 13, p. 10401–10405

We investigate the effects of variable linear charge density and Debye length on the mesoscopic properties of β-lactoglobulin fibers in water, by changing the pH and ionic strength, respectively. We determine the isotropic−nematic (I−N) transition by cross-polarized microscopy and quantify by atomic force microscopy the increasing tendency of the fibers to aggregate upon raising ionic...