Issue 43, 2021

Photothermally responsive Pickering emulsions stabilised by polydopamine nanobowls

Abstract

Pickering emulsions with stimuli responsive properties have attracted mounting research attention owing to their potential for on-demand destabilisation of emulsions. However, a combination of biocompatibility and long-term stability are essential to efficiently apply such systems in biomedical applications, and this remains a significant challenge. To address current limitations, here we report the formation of photothermally responsive oil-in-water (o/w) Pickering emulsions fabricated using biocompatible stabilisers and showing prolonged stability. For the first time, we explore polydopamine (PDA) bowl-shaped mesoporous nanoparticles (PDA nanobowls) as a Pickering stabiliser without any surface modification or other stabiliser present. As-prepared PDA nanobowl-stabilised Pickering emulsions are shown to be pH responsive, and more significantly show high photothermal efficiency under near-infrared illumination due the incorporation of PDA into the system, which has remarkable photothermal response. These biocompatible, photothermally responsive o/w Pickering emulsion systems show potential in controlled drug release applications stimulated by NIR illumination.

Graphical abstract: Photothermally responsive Pickering emulsions stabilised by polydopamine nanobowls

Supplementary files

Article information

Article type
Paper
Submitted
18 Aug. 2021
Accepted
15 Sept. 2021
First published
16 Sept. 2021

J. Mater. Chem. B, 2021,9, 8962-8970

Photothermally responsive Pickering emulsions stabilised by polydopamine nanobowls

S. Acter, M. L. P. Vidallon, J. P. King, B. M. Teo and R. F. Tabor, J. Mater. Chem. B, 2021, 9, 8962 DOI: 10.1039/D1TB01796A

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