Photothermally responsive Pickering emulsions stabilised by polydopamine nanobowls

Shahinur Acter, Mark Louis P. Vidallon, Joshua P. King, Boon Mian Teo, Rico F. Tabor

Research output: Contribution to journalArticleResearchpeer-review

18 Citations (Scopus)

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. This journal is

Original languageEnglish
Pages (from-to)8962-8970
Number of pages9
JournalJournal of Materials Chemistry B
Volume9
Issue number43
DOIs
Publication statusPublished - 21 Nov 2021

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