TY  - JOUR
AU  - July, C.
AU  - Kleshchanok, D.
AU  - Lang, P.R.
TI  - Depletion interactions caused by polydisperse platelets
JO  - Soft matter
VL  - 7
SN  - 1744-683X
CY  - Cambridge
PB  - Royal Society of Chemistry (RSC)
M1  - PreJuSER-17876
SP  - 6444 - 6450
PY  - 2011
N1  - The authors acknowledge financial support from the EU through FP7, project Nanodirect (Grant No. NMP4-SL-2008-213948).
AB  - We investigate depletion interactions near a wall caused by polydisperse silica-coated gibbsite platelets, using total internal reflection fluorescence microscopy (TIRF) to characterize the sphere-wall interaction potential. As no theoretical model for polydisperse platelets exists, we extend a model for monodisperse depletant cylinders by assuming negligible thickness and averaging over the disc size distribution, finding nearly perfect matching with experimental data. The resulting averaged depletion potentials have, as predicted by the extended model, the same depth as monodisperse potentials, but differ in range and shape according to the size distribution. We compare mean particle sizes and standard deviations derived by TIRF with results from TEM measurements.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000292985500012
DO  - DOI:10.1039/c1sm05429e
UR  - https://juser.fz-juelich.de/record/17876
ER  -