Diffusional deposition of charged latex particles on water-solid interfaces at low ionic strength

被引:121
作者
Semmler, M
Mann, EK
Ricka, J
Borkovec, M [1 ]
机构
[1] Clarkson Univ, Dept Chem, Potsdam, NY 13699 USA
[2] Univ Bern, Inst Appl Phys, CH-3012 Bern, Switzerland
[3] Kent State Univ, Dept Phys, Kent, OH 44242 USA
[4] ETH ITO, CH-8952 Schlieren, Switzerland
关键词
D O I
10.1021/la9801559
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The deposition of positively charged latex particles with radii between 20 and 100 nm on a negatively charged mica surface is investigated with atomic force microscopy at low ionic strengths. The polystyrene latex spheres with amidine headgroups are characterized as to their size distribution, electrophoretic mobility, and aggregation behavior. Surface coverage measurements take into account the polydispersity of the particles on the surface. Deposition kinetics from a quiescent solution are, for low coverage, in good agreement with diffusion-limited adsorption. At long times, the surface coverage tends toward a maximum surface coverage theta(max) independent of the particle concentration but depending on ionic strength. This work extends the available data for theta(max) for small particle size and very low ionic strengths. The values for theta(max) decrease with decreasing ionic strength; this trend is described with a simple model based on random sequential adsorption and the effect of overlapping double layers. Particle size polydispersity can modify the results for theta(max) substantially; its influence is investigated in detail.
引用
收藏
页码:5127 / 5132
页数:6
相关论文
共 35 条
[1]   Influence of polydispersity on random sequential adsorption of spherical particles [J].
Adamczyk, Z ;
Siwek, B ;
Zembala, M ;
Weronski, P .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1997, 185 (01) :236-244
[2]   Role of electrostatic interactions in particle adsorption [J].
Adamczyk, Z ;
Warszynski, P .
ADVANCES IN COLLOID AND INTERFACE SCIENCE, 1996, 63 :41-149
[3]   KINETICS OF LOCALIZED ADSORPTION OF COLLOID PARTICLES [J].
ADAMCZYK, Z ;
SIWEK, B ;
ZEMBALA, M ;
BELOUSCHEK, P .
ADVANCES IN COLLOID AND INTERFACE SCIENCE, 1994, 48 :151-280
[4]  
[Anonymous], LIGHT SCATTERING PRI
[5]  
Berne BJ, 1990, DYNAMIC LIGHT SCATTE
[6]   Kinetics of particle adsorption in stagnation point flow studied by optical reflectometry [J].
Bohmer, MR ;
van der Zeeuw, EA ;
Koper, GJM .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1998, 197 (02) :242-250
[7]   POTENTIAL OF A SPHERE IN AN IONIC SOLUTION IN THIN DOUBLE-LAYER APPROXIMATIONS [J].
CHEW, WC ;
SEN, PN .
JOURNAL OF CHEMICAL PHYSICS, 1982, 77 (04) :2042-2044
[8]  
Crank J, 1979, MATH DIFFUSION
[9]   A DIRECT METHOD FOR STUDYING PARTICLE DEPOSITION ONTO SOLID-SURFACES [J].
DABROS, T ;
VANDEVEN, TGM .
COLLOID AND POLYMER SCIENCE, 1983, 261 (08) :694-707
[10]   ELECTROKINETIC PROPERTIES OF AQUEOUS SUSPENSIONS OF POLYSTYRENE SPHERES IN THE GAS AND LIQUID-LIKE PHASE [J].
DEGGELMANN, M ;
PALBERG, T ;
HAGENBUCHLE, M ;
MAIER, EE ;
KRAUSE, R ;
GRAF, C ;
WEBER, R .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1991, 143 (02) :318-326