General approach to surface-accessible plasmonic Pickering emulsions for SERS sensing and interfacial catalysis

Yingrui Zhang, Ziwei Ye, Chunchun Li, Qinglu Chen, Wafaa Aljuhani, Yiming Huang, Xin Xu, Chunfei Wu, Steven E. J. Bell and Yikai Xu ()
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Yingrui Zhang: Queen’s University Belfast
Ziwei Ye: East China University of Science & Technology
Chunchun Li: Queen’s University Belfast
Qinglu Chen: Queen’s University Belfast
Wafaa Aljuhani: Queen’s University Belfast
Yiming Huang: Queen’s University Belfast
Xin Xu: Fudan University
Chunfei Wu: Queen’s University Belfast
Steven E. J. Bell: Queen’s University Belfast
Yikai Xu: Queen’s University Belfast

Nature Communications, 2023, vol. 14, issue 1, 1-12

Abstract: Abstract Pickering emulsions represent an important class of functional materials with potential applications in sustainability and healthcare. Currently, the synthesis of Pickering emulsions relies heavily on the use of strongly adsorbing molecular modifiers to tune the surface chemistry of the nanoparticle constituents. This approach is inconvenient and potentially a dead-end for many applications since the adsorbed modifiers prevent interactions between the functional nanosurface and its surroundings. Here, we demonstrate a general modifier-free approach to construct Pickering emulsions by using a combination of stabilizer particles, which stabilize the emulsion droplet, and a second population of unmodified functional particles that sit alongside the stabilizers at the interface. Freeing Pickering emulsions from chemical modifiers unlocks their potential across a range of applications including plasmonic sensing and interfacial catalysis that have previously been challenging to achieve. More broadly, this strategy provides an approach to the development of surface-accessible nanomaterials with enhanced and/or additional properties from a wide range of nano-building blocks including organic nanocrystals, carbonaceous materials, metals and oxides.

Date: 2023
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DOI: 10.1038/s41467-023-37001-1

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