An atomic force microscope was used to measure the forces between a silica sphere (diameter 10 ΞΌm) and a n-decane droplet (diameter 0.3 mm) in water. Force-distance profiles showed a weak attraction and adhesion due to van der Waals forces. When the anionic surfactant sodium dodecyl sulfate was adde
An Expression for the Dispersion Force between Colloidal Particles
β Scribed by Douglas Henderson; Der-Ming Duh; Xiaolin Chu; Darsh Wasan
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 107 KB
- Volume
- 185
- Category
- Article
- ISSN
- 0021-9797
No coin nor oath required. For personal study only.
β¦ Synopsis
If the radii a and b are large and if R Γ a / b A result for the integral of R 012 over two spheres of radii a and b is given. This result, together with Hamaker's result for the integral of R 06 , leads to an expression for the integral of the Len-
nard-Jones potential over two spheres that is suitable for calculations involving colloidal particles.
π SIMILAR VOLUMES
An approximate analytic expression for the surface charge density/surface potential relationship (/ 0 ) for a spherical colloidal particle in a solution of mixed and nonsymmetrical electrolytes is obtained by solving a nonlinear Poisson-Boltzmann equation using a linearization approximation. The app
An approximate analytic expression for the electrophoretic mobility of a spherical colloidal particle in a symmetrical electrolyte solution is obtained. This mobility expression, which is correct to the order of the third power of the ΞΆ-potential of the particle, considerably improves Henry's mobili
## are dependent on the interactions between colloidal particles The van der Waals and electrostatic interaction energies beor particles and macroscopic surfaces. Traditionally, colloitween a single particle and a flat plate were measured using the dal interactions have been described by the DLVO