Volume 63, Issue 1 e202311678
Research Article

Liquid Metal Nanocores Initiated Construction of Smart DNA-Polymer Microgels with Programmable and Regulable Functions and Near-Infrared Light-Driven Locomotion

Yaxing Zhang

Yaxing Zhang

Research Center for Analytical Sciences, Tianjin Key Laboratory of Biosensing and Molecular Recognition, College of Chemistry, Nankai University, 30071 Tianjin, P. R. China

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Chunyan Wang

Chunyan Wang

Research Center for Analytical Sciences, Tianjin Key Laboratory of Biosensing and Molecular Recognition, College of Chemistry, Nankai University, 30071 Tianjin, P. R. China

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Mengyuan Yin

Mengyuan Yin

Research Center for Analytical Sciences, Tianjin Key Laboratory of Biosensing and Molecular Recognition, College of Chemistry, Nankai University, 30071 Tianjin, P. R. China

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Hanxue Liang

Hanxue Liang

Research Center for Analytical Sciences, Tianjin Key Laboratory of Biosensing and Molecular Recognition, College of Chemistry, Nankai University, 30071 Tianjin, P. R. China

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Qi Gao

Qi Gao

Research Center for Analytical Sciences, Tianjin Key Laboratory of Biosensing and Molecular Recognition, College of Chemistry, Nankai University, 30071 Tianjin, P. R. China

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Shanjin Hu

Shanjin Hu

Research Center for Analytical Sciences, Tianjin Key Laboratory of Biosensing and Molecular Recognition, College of Chemistry, Nankai University, 30071 Tianjin, P. R. China

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Prof. Weiwei Guo

Corresponding Author

Prof. Weiwei Guo

Research Center for Analytical Sciences, Tianjin Key Laboratory of Biosensing and Molecular Recognition, College of Chemistry, Nankai University, 30071 Tianjin, P. R. China

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First published: 14 November 2023
Citations: 7

Graphical Abstract

Surface-initiated polymerization reaction of gallium-based liquid metal nanoparticles under sonication allows the construction of smart core/shell microgels. Multifunctional DNA microgels with tunable properties were prepared by introducing different vinyl monomers and functional DNA structures and controlling the polymerization process. The photothermal effect of LM NPs also contributed to the NIR-driven motion of these smart microgels.

Abstract

Due to their sequence-directed functions and excellent biocompatibility, smart DNA microgels have attracted considerable research interest, and the combination of DNA microgels with functional nanostructures can further expand their applications in biosensing and biomedicine. Gallium-based liquid metals (LMs) exhibiting both fluidic and metallic properties hold great promise for the development of smart soft materials; in particular, LM particles upon sonication can mediate radical-initiated polymerization reactions, thus allowing the combination of LMs and polymeric matrix to construct “soft–soft” materials. Herein, by forming active surfaces under sonication, LM nanoparticles (LM NPs) initiated localized radical polymerization reactions allow the combination of functional DNA units and different polymeric backbones to yield multifunctional core/shell microgels. The localized polymerization reaction allows fine control of the microgel compositions, and smart DNA microgels with tunable catalytic activities can be constructed. Moreover, due to the excellent photothermal effect of LM NPs, the resulting temperature gradient between microgels and surrounding solution upon NIR light irradiation can drive the oriented locomotion of the microgels, and remote control of the activity of these smart microgels can be achieved. These microgels may hold promise for various applications, such as the development of in vivo and in vitro biosensing and drug delivery systems.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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