What is it about?
Water-in-oil microemulsions were used as a soft template for the surface assembly of oleyl-capped nanoparticles. The morphologies of the resulting nanostructured assemblies after solvent evaporation could be adapted according to different combinations of alkane and alkanol solvents for the oil phase. This alkane-to-alkanol ratio can control the interactions and assembly properties of oleyl-capped nanoparticles, by stabilization with alkanes and flocculation with alkanols. For instance, nanostructured filament networks can be obtained with an optimal proportion of heptane in a majority of pentanol, while honey-comb-like arrangments resulted by using only heptane as the oil phase.
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Why is it important?
A more facile way to form hybrid nanostructured films of ordered nanoparticles, with extension above the micro-scale, is presented. The proportion of oil solvents can control such nanoparticle organization without the assistance of other additives.
Perspectives
A further insight about the use of water-in-oil microemulsions as soft templates for the interfacial assembly of nanoparticles is presented. In previous studies, nanostructured filament networks required the presence of poylethyneimine-capped nanoparticles in the micoremulsion water droplets. Simplified conditions for these soft templates of oleyl-caped nanoparticles, without other additives, are enabled by a determined composition of the oil phase.
Rebeca Fortes Martín
Helmholtz Zentrum Berlin
Read the Original
This page is a summary of: Tuning surface assembly of oleyl-capped nanoparticles in AOT microemulsion phase with optimal alkane-to-alkanol ratio, Colloids and Interface Science Communications, May 2025, Elsevier,
DOI: 10.1016/j.colcom.2025.100836.
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