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231224s2012 xx |||||o 00| ||eng c |
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7 |
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|a 10.1021/la303547m
|2 doi
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| 041 |
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|a eng
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| 100 |
1 |
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|a Xing, Xiaochen
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Stabilization of colloidal suspensions
|b competing effects of nanoparticle halos and depletion mechanism
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| 264 |
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|c 2012
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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| 500 |
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|a Date Completed 02.05.2013
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|a Date Revised 20.11.2012
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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| 520 |
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|a Bimodal colloidal mixtures of nanoparticles and microparticles may show different phase behaviors depending upon the interparticle interaction of both species. In the present work, we examined the stabilization of spherical microparticles using highly charged, spherical nanoparticles. Total internal reflection microscopy (TIRM) was used to measure the interaction forces between a charged microparticle and flat glass substrate in aqueous solutions at varying volume fractions of nanoparticles of the same sign. We found that, in the system containing of highly charged nanoparticles, microparticle, and glass substrate, non-adsorbing charged nanoparticles in solution did not lead to depletion attraction. Instead, the addition of nanoparticles was to consistently create a repulsive force between the microparticle and glass substrate even at a very low nanoparticle volume fraction. This result might attributed to the formation of thin shells (halos) with a high local nanoparticle volume fraction to the region near the glass surface, resulting in electrostatic repulsion between the decorated surfaces. This study demonstrates that nanoparticle halos can also arise in binary systems of mutually but highly repulsive microparticle/nanoparticle dispersions
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| 650 |
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|a Journal Article
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| 700 |
1 |
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|a Sun, Guanqing
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Zifu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ngai, To
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 28(2012), 46 vom: 20. Nov., Seite 16022-8
|w (DE-627)NLM098181009
|x 1520-5827
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| 773 |
1 |
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|g volume:28
|g year:2012
|g number:46
|g day:20
|g month:11
|g pages:16022-8
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|u http://dx.doi.org/10.1021/la303547m
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