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|a eng
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1 |
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|a Zackrisson, M
|e verfasserin
|4 aut
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|a Small-angle neutron scattering on a core-shell colloidal system
|b a contrast-variation study
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|c 2005
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|2 rdacarrier
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|a Date Completed 04.05.2007
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|a Date Revised 02.11.2005
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a Small-angle neutron scattering (SANS) measurements are reported on a sterically stabilized, core-shell colloidal system using contrast variation. Aqueous dispersions of polystyrene particles bearing grafted poly(ethylene glycol) (PEG) have been studied over a large range of particle concentrations and two different solvent conditions for the PEG polymer. SANS data are analyzed quantitatively by modeling the particles as core-shell colloids. In a good solvent and under particle contrast conditions, an effective hard-sphere interaction captures excluded-volume interactions up to high concentrations. Contrast variation, through isotopic substitution of both the core and solvent, expedite a detailed study of the PEG layer, both in the dilute limit and as a function of the particle concentration. Upon diminishing the solvent quality, subtle changes in the PEG layer translate into attractions among particles of moderate magnitude
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|a Journal Article
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|a Stradner, A
|e verfasserin
|4 aut
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|a Schurtenberger, P
|e verfasserin
|4 aut
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|a Bergenholtz, J
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1999
|g 21(2005), 23 vom: 08. Nov., Seite 10835-45
|w (DE-627)NLM098181009
|x 1520-5827
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| 773 |
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|g volume:21
|g year:2005
|g number:23
|g day:08
|g month:11
|g pages:10835-45
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|d 21
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