Degradable mesoporous semimetal antimony nanospheres for near-infrared II multimodal theranostics

Yu Chen, Zhongzheng Yu, Kai Zheng, Yaguang Ren, Meng Wang, Qiang Wu, Feifan Zhou, Chengbo Liu, Liwei Liu, Jun Song () and Junle Qu ()
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Yu Chen: Shenzhen University
Zhongzheng Yu: School of Chemical and Biomedical Engineering Nanyang Technological University
Kai Zheng: Northwestern Polytechnical University, School of Civil Aviation, 127 West Youyi Road, Beilin District
Yaguang Ren: Chinese Academy of Sciences
Meng Wang: Shenzhen University
Qiang Wu: Shenzhen University
Feifan Zhou: Shenzhen University
Chengbo Liu: Northwestern Polytechnical University, School of Civil Aviation, 127 West Youyi Road, Beilin District
Liwei Liu: Shenzhen University
Jun Song: Shenzhen University
Junle Qu: Shenzhen University

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Metallic and semimetallic mesoporous frameworks are of great importance owing to their unique properties and broad applications. However, semimetallic mesoporous structures cannot be obtained by the traditional template-mediated strategies due to the inevitable hydrolytic reaction of semimetal compounds. Therefore, it is yet challenging to fabricate mesoporous semimetal nanostructures, not even mention controlling their pore sizes. Here we develop a facile and robust selective etching route to synthesize monodispersed mesoporous antimony nanospheres (MSbNSs). The pore sizes of MSbNSs are tunable by carefully controlling the partial oxidation of Sb nuclei and the selective etching of the as-formed Sb2O3. MSbNSs show a wide absorption from visible to second near-infrared (NIR-II) region. Moreover, PEGylated MSbNSs are degradable and the degradation mechanism is further explained. The NIR-II photothermal performance of MSbNSs is promising with a high photothermal conversion efficiency of ~44% and intensive NIR-II photoacoustic signal. MSbNSs show potential as multifunctional nanomedicines for NIR-II photoacoustic imaging guided synergistic photothermal/chemo therapy in vivo. Our selective etching process would contribute to the development of various semimetallic mesoporous structures and efficient multimodal nanoplatforms for theranostics.

Date: 2022
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DOI: 10.1038/s41467-021-27835-y

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