| Autor: |
Ogilvie SP; University of Sussex, Brighton BN1 9RH, United Kingdom., Large MJ; University of Sussex, Brighton BN1 9RH, United Kingdom., O'Mara MA; University of Sussex, Brighton BN1 9RH, United Kingdom., Sehnal AC; University of Sussex, Brighton BN1 9RH, United Kingdom., Amorim Graf A; University of Sussex, Brighton BN1 9RH, United Kingdom., Lynch PJ; University of Sussex, Brighton BN1 9RH, United Kingdom., Cass AJ; University of Sussex, Brighton BN1 9RH, United Kingdom., Salvage JP; University of Brighton, Brighton BN2 4GJ, United Kingdom., Alfonso M; Centre de Recherche Paul Pascal - CNRS, University of Bordeaux, 33600 Pessac, France., Poulin P; Centre de Recherche Paul Pascal - CNRS, University of Bordeaux, 33600 Pessac, France., King AAK; University of Sussex, Brighton BN1 9RH, United Kingdom., Dalton AB; University of Sussex, Brighton BN1 9RH, United Kingdom. |
| Abstrakt: |
Here, we develop a framework for assembly, understanding, and application of functional emulsions stabilized by few-layer pristine two-dimensional (2D) nanosheets. Liquid-exfoliated graphene and MoS 2 are demonstrated to stabilize emulsions at ultralow nanosheet volume fractions, approaching the minimum loading achievable with 2D materials. These nanosheet-stabilized emulsions allow controlled droplet deposition free from the coffee ring effect to facilitate single-droplet devices from minute quantities of material or assembly into large-area films with high network conductivity. To broaden the range of compositions and subsequent applications, an understanding of emulsion stability and orientation in terms of surface energy of the three phases is developed. Importantly, this model facilitates determination of the surface energies of the nanosheets themselves and identifies strategies based on surface tension and pH to allow design of emulsion structures. Finally, this approach is used to prepare conductive silicone emulsion composites with a record-low loading level and excellent electromechanical sensitivity. The versatility of these nanosheet-stabilized emulsions illustrates their potential for low-loading composites, thin-film formation and surface energy determination, and the design of functional structures for a range of segregated network applications. |
