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Saha A, John VT, Bose A. In Situ Assembly of Hydrophilic and Hydrophobic Nanoparticles at Oil-Water Interfaces as a Versatile Strategy To Form Stable Emulsions. ACS Appl Mater Interfaces. 2015;7(38):21010-4doi: 10.1021/acsami.5b06940.
Saha, A., John, V. T., & Bose, A. (2015). In Situ Assembly of Hydrophilic and Hydrophobic Nanoparticles at Oil-Water Interfaces as a Versatile Strategy To Form Stable Emulsions. ACS applied materials & interfaces, 7(38), 21010-4. https://doi.org/10.1021/acsami.5b06940
Saha, Amitesh, et al. "In Situ Assembly of Hydrophilic and Hydrophobic Nanoparticles at Oil-Water Interfaces as a Versatile Strategy To Form Stable Emulsions." ACS applied materials & interfaces vol. 7,38 (2015): 21010-4. doi: https://doi.org/10.1021/acsami.5b06940
Saha A, John VT, Bose A. In Situ Assembly of Hydrophilic and Hydrophobic Nanoparticles at Oil-Water Interfaces as a Versatile Strategy To Form Stable Emulsions. ACS Appl Mater Interfaces. 2015 Sep 30;7(38):21010-4. doi: 10.1021/acsami.5b06940. Epub 2015 Sep 17. PMID: 26372053.
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ACS Appl Mater Interfaces. 2015 Sep 30;7(38):21010-4. doi: 10.1021/acsami.5b06940. Epub 2015 Sep 17.

In Situ Assembly of Hydrophilic and Hydrophobic Nanoparticles at Oil-Water Interfaces as a Versatile Strategy To Form Stable Emulsions.

ACS applied materials & interfaces

Amitesh Saha, Vijay T John, Arijit Bose

Affiliations

  1. Department of Chemical Engineering, University of Rhode Island , Kingston, Rhode Island 02881, United States.
  2. Department of Chemical and Biomolecular Engineering, Tulane University , New Orleans, Louisiana 70118, United States.

PMID: 26372053 DOI: 10.1021/acsami.5b06940

Abstract

We report a conceptually new strategy for forming particle-stabilized emulsions. We begin with stable, dilute suspensions of highly hydrophilic nanoparticles in water and hydrophobic nanoparticles in oil. When the two suspensions are mixed, attractive interactions between the hydrophilic and hydrophobic particles cause them to assemble at the oil-water interfaces into partially wettable or Janus-like clusters that effectively stabilize emulsions. By tuning the ratio of hydrophilic to hydrophobic particles in the clusters, both water-in-oil as well as oil-in-water emulsions can be formed. The van der Waals interaction energy between two particle types across an aqueous-organic interface provide a systematic guide to particle and liquid combinations that can form stable emulsions using our strategy, or identify when emulsions will not form. Our experiments and analysis provide a new platform for the formation of particle-stabilized emulsions and can be used to combine particles of different functionalities at emulsion droplet surfaces for generating novel materials.

Keywords: in situ particle cluster assembly; particle aggregates; particle-stabilized emulsion; van der Waals interaction

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