Deposition of nanosized latex particles onto silica and cellulose surfaces studied by optical reflectometry

Article Article scientifique Article Deposition of nanosized latex particles onto silica and cellulose surfaces studied by optical reflectometry eng 2006 author Kleimann Jorg 551548 author Lecoultre Guy 134760 author Papastavrou Georg Alexander 553547 author Jeanneret Grosjean Stéphane 134756 author Galletto Paolo 134937 author Koper Ger J.M. author Borkovec Michal 134121 460-471 10.1016/j.jcis.2006.08.006 0021-9797 https://linkinghub.elsevier.com/retrieve/pii/S0021979706007223 Deposition of positively charged nanosized latex particles onto planar silica and cellulose substrates was studied in monovalent electrolyte solutions at pH 9.5. The deposition was probed in situ with optical reflectometry in a stagnation point flow cell. The surface coverage can be estimated reliably with island film theory as well as with a homogeneous film model, as confirmed with atomic force microscopy (AFM). The deposition kinetics on the bare surface was of first order with respect to the particle concentration, whereby the deposition rate was close to the value expected for a perfect collector. The efficiency coefficient, which was defined as the ratio of the experimental and theoretical deposition rate constants, was in the range from 0.3 to 0.7. Subsequently, the surface saturated and a limiting maximum coverage was attained (i.e., blocking). These trends were in qualitative agreement with predictions of the random sequential absorption (RSA) model, where electrostatic interactions between the particles were included. It was observed, however, that the substrate strongly influenced the maximum coverage, which was substantially higher for silica than for cellulose. The major conclusion of this work was that the nature of the substrate played an important role in a saturated layer of deposited colloidal particles. Stagnation point flow cell Island film theory Atomic force microscopy AFM Ellipsometry Random sequential absorption model RSA model Dewey 540 40 Département de chimie minérale, analytique et appliquée 145 false Journal of Colloid and Interface Science 303 2 ad0dd04e-2406-4120-962e-f239f5fdc633 Article (Published version) Restricted Deposition_MB_2006.pdf 595760 application/pdf restrictedAccess Faculté des sciences / Section de chimie et biochimie / Département de chimie minérale, analytique et appliquée

Title	Published in	Access level	OA Policy	Year	Views	Downloads

Deposition of nanosized latex particles onto silica and cellulose surfaces studied by optical reflectometry	Journal of Colloid and Interface Science			2006	188	0

Archive ouverte UNIGE

Lecoultre, Guy