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|a eng
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| 100 |
1 |
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|a Gilchrist, James F
|e verfasserin
|4 aut
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| 245 |
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|a Phase behavior and 3D structure of strongly attractive microsphere-nanoparticle mixtures
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| 264 |
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|c 2005
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| 336 |
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
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|2 rdamedia
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|2 rdacarrier
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|a Date Completed 05.04.2007
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|a Date Revised 15.11.2005
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a We investigate the phase behavior and 3D structure of strongly attractive mixtures of silica microspheres and polystyrene nanoparticles. These binary mixtures are electrostatically tuned to promote a repulsion between like-charged (microsphere-microsphere and nanoparticle-nanoparticle) species and a strong attraction between oppositely charged (microsphere-nanoparticle) species. Using confocal fluorescence scanning microscopy, we directly observe the 3D structure of colloidal phases assembled from these mixtures as a function of varying composition. In the absence of nanoparticle additions, the charged-stabilized microspheres assemble into a polycrystalline array upon sedimentation. With increasing nanoparticle volume fraction, nanoparticle bridges form between microspheres, inducing their flocculation. At even higher nanoparticle volume fractions, the microspheres become well coated with nanoparticles, leading to their charge reversal and subsequent restabilization. We demonstrate how this fluid-gel-fluid transition can be utilized to control the morphology of the colloidal phases formed under gravity-driven sedimentation
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|a Journal Article
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| 700 |
1 |
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|a Chan, Angel T
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Weeks, Eric R
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lewis, Jennifer A
|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 21(2005), 24 vom: 22. Nov., Seite 11040-7
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|g month:11
|g pages:11040-7
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