Depletion controlled surface deposition of uncharged colloidal spheres from stable bulk dispersions
(2016) In Soft Matter 12(17). p.3963-3971- Abstract
The competition between surface adsorption and bulk aggregation was investigated for silica colloids dispersed in cyclohexane in contact with hydrophobized silica substrates. Central to this study is that the colloids and surfaces have the same material and surface properties. Colloid-colloid and colloid-surface interactions were controlled by addition of polymers providing depletion interaction. Bulk instability was determined by turbidity and viscosity measurements and surface adsorption by ellipsometry measurements. At increasing polymer concentration, strong surface adsorption occurred at polymer concentrations below that required for bulk phase separation. Complementary Monte Carlo simulations with the use of a new weak depletion... (More)
The competition between surface adsorption and bulk aggregation was investigated for silica colloids dispersed in cyclohexane in contact with hydrophobized silica substrates. Central to this study is that the colloids and surfaces have the same material and surface properties. Colloid-colloid and colloid-surface interactions were controlled by addition of polymers providing depletion interaction. Bulk instability was determined by turbidity and viscosity measurements and surface adsorption by ellipsometry measurements. At increasing polymer concentration, strong surface adsorption occurred at polymer concentrations below that required for bulk phase separation. Complementary Monte Carlo simulations with the use of a new weak depletion theory support quantitatively the experimental observation of the existence of an interval of interaction strength at which aggregation in bulk is negligible while surface adsorption is substantial.
(Less)
- author
- Ouhajji, Samia ; Nylander, Tommy LU ; Piculell, Lennart LU ; Tuinier, Remco ; Linse, Per LU and Philipse, Albert P.
- organization
- publishing date
- 2016-05-07
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Soft Matter
- volume
- 12
- issue
- 17
- pages
- 9 pages
- publisher
- Royal Society of Chemistry
- external identifiers
-
- pmid:27025949
- wos:000374974000015
- scopus:84966283649
- ISSN
- 1744-683X
- DOI
- 10.1039/c5sm02892b
- language
- English
- LU publication?
- yes
- id
- 43ac0833-58df-4c64-bb3c-d44eea5bc438
- date added to LUP
- 2016-10-10 10:20:43
- date last changed
- 2024-04-19 10:10:32
@article{43ac0833-58df-4c64-bb3c-d44eea5bc438,
abstract = {{<p>The competition between surface adsorption and bulk aggregation was investigated for silica colloids dispersed in cyclohexane in contact with hydrophobized silica substrates. Central to this study is that the colloids and surfaces have the same material and surface properties. Colloid-colloid and colloid-surface interactions were controlled by addition of polymers providing depletion interaction. Bulk instability was determined by turbidity and viscosity measurements and surface adsorption by ellipsometry measurements. At increasing polymer concentration, strong surface adsorption occurred at polymer concentrations below that required for bulk phase separation. Complementary Monte Carlo simulations with the use of a new weak depletion theory support quantitatively the experimental observation of the existence of an interval of interaction strength at which aggregation in bulk is negligible while surface adsorption is substantial.</p>}},
author = {{Ouhajji, Samia and Nylander, Tommy and Piculell, Lennart and Tuinier, Remco and Linse, Per and Philipse, Albert P.}},
issn = {{1744-683X}},
language = {{eng}},
month = {{05}},
number = {{17}},
pages = {{3963--3971}},
publisher = {{Royal Society of Chemistry}},
series = {{Soft Matter}},
title = {{Depletion controlled surface deposition of uncharged colloidal spheres from stable bulk dispersions}},
url = {{http://dx.doi.org/10.1039/c5sm02892b}},
doi = {{10.1039/c5sm02892b}},
volume = {{12}},
year = {{2016}},
}