TY  - JOUR
AU  - Desio, Silvia
AU  - Lang, Peter R.
TI  - Depletion Interaction Mediated by fd-Virus: on the Limit of Low Density and Derjaguin Approximation
JO  - Zeitschrift für physikalische Chemie
VL  - 229
IS  - 7-8
SN  - 2196-7156
CY  - Berlin
PB  - De @Gruyter
M1  - FZJ-2016-00117
SP  - 1161-1175
PY  - 2015
AB  - Depletion potentials induced by the rod-like fd-virus between colloidal probe spheres and a flat glass wall were measured using total internal reflection microscopy. The objective of this investigation was to determine the limits of the approximations used for the theoretical description of the depletion pair potential. Data were obtained at rod concentrations as high as 15 times their overlap concentration and the size ratio between the rod length and the sphere radius increased up to L/R = 1.76. With this, the basic assumptions for low density approximation and Derjaguin approximation were clearly violated. Nevertheless, we observed good agreement between experimental data and predictions up to the highest size ratio and in rod concentrations of seven times their overlap concentration. Only at higher concentrations and at the lowest size ratio investigated the experimental data deviate significantly from the simple model.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000359160600008
DO  - DOI:10.1515/zpch-2014-0553
UR  - https://juser.fz-juelich.de/record/280333
ER  -