Journal article
Effect of Colloidal Particle Size on Adsorbed Monodisperse and Bidisperse Mono layers
Langmuir, v 27(14), pp 8729-8734
19 Jul 2011
PMID: 21678922
Abstract
Coating hydrogel films or microspheres by an adsorbed colloidal shell is one synthesis method for forming colloidosomes. The colloidal shell allows control of the release rate of encapsulated materials, as well as selective transport. Previous studies found that the packing density of self-assembled, adsorbed colloidal monolayers is independent of the colloidal particle size. In this paper we develop an equilibrium model that correlates the packing density of charged colloidal particles in an adsorbed shell to the particle dimensions in monodisperse and bidisperse systems. In systems where the molar concentration in solution is fixed, the increase in adsorption energy with increasing particle size leads to a monotonic increase in the monolayer packing density with particle radius. However, in systems where the mass fraction of the particles in the adsorbing solutions is fixed, increasing particle size also reduces the molar concentration of particles in solution, thereby reducing the probability of adsorption. The result is a nonmonotonic dependence of the packing density in the adsorbed layer on the particle radius. In bidisperse monolayers composed of two particle sizes, the packing density in the layer increases significantly with size asymmetry. These results may be utilized to design the properties of colloidal shells and coatings to achieve specific properties such as transport rate and selectivity.
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Details
- Title
- Effect of Colloidal Particle Size on Adsorbed Monodisperse and Bidisperse Mono layers
- Creators
- Rachel T. Rosenberg - Drexel UniversityNily Dan - Drexel University
- Publication Details
- Langmuir, v 27(14), pp 8729-8734
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 6
- Grant note
- DGE-0654313 / NSF-IGERT; National Science Foundation (NSF) 0649897 / NSF/IDBR; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Web of Science ID
- WOS:000292617800018
- Scopus ID
- 2-s2.0-79960225405
- Other Identifier
- 991019312369904721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary