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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.0c03401
|2 doi
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|a pubmed24n1078.xml
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|a (DE-627)NLM323534066
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|a (NLM)33797907
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Fiorati, Andrea
|e verfasserin
|4 aut
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| 245 |
1 |
0 |
|a Dispersions of Zirconia Nanoparticles Close to the Phase Boundary of Surfactant-Free Ternary Mixtures
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|c 2021
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| 336 |
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 28.05.2021
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The achievement of a homogeneous dispersion of nanoparticles is of paramount importance in supporting their technological application. In wet processing, stable dispersions were largely obtained via surfactant or surface functionalization: although effective, the use of dispersant can alter, or even impair, the functional properties of the resulting nanostructured systems. Herein, we report a novel integrated modeling and experimental approach to obtain stable ZrO2 nanoparticle (NP) dispersions at native dimensions (about 5 nm) in homogeneous ternary mixtures of solvents (i.e., water, ethanol, and 1,2-dichlorobenzene) without any further surface functionalization. A miscibility ternary diagram was computed exploiting the universal quasi-chemical functional-group activity coefficient (UNIFAC) model, which was then experimentally validated. Dynamic light scattering (DLS) on these mixtures highlights that nanometric structures, resembling nanoemulsion droplets, form close to the mixture two-phase boundary, with a size that depends on the ternary mixture composition. ZrO2-NPs were then synthesized following a classic sol-gel approach and characterized by XRD and Raman spectroscopy. ZrO2-NPs were dispersed in HCl and mixed with different mixtures of ethanol and 1,2-dichlorobenzene (DCB), obtaining homogeneous and stable dispersions. These dispersions were then studied by means of DLS as a function of DCB concentration, observing that the nanoparticles can be dispersed at their native dimensions when the mass fraction of DCB was lower than 60%, whereas the increase of the hydrophobic solvent leads to the NPs' agglomeration and sedimentation. The proposed approach not only offers specific guidelines for the design of ZrO2-NPs dispersions in a ternary solvent mixture but can also be extended to other complex solvent mixtures in order to achieve stable dispersions of nanoparticles with no functionalization
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| 650 |
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4 |
|a Journal Article
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1 |
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|a Florit, Federico
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Mazzei, Andrea
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Buzzaccaro, Stefano
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Rossi, Barbara
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Piazza, Roberto
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Rota, Renato
|e verfasserin
|4 aut
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| 700 |
1 |
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|a De Nardo, Luigi
|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 37(2021), 14 vom: 13. Apr., Seite 4072-4081
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:37
|g year:2021
|g number:14
|g day:13
|g month:04
|g pages:4072-4081
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|u http://dx.doi.org/10.1021/acs.langmuir.0c03401
|3 Volltext
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