Plasmonic Pt Superstructures with Boosted Near‐Infrared Absorption and Photothermal Conversion Efficiency in the Second Biowindow for Cancer Therapy

光热治疗 材料科学 等离子体子 光热效应 吸收(声学) 表面等离子共振 光电子学 纳米技术 纳米颗粒 复合材料
作者
Qishun Wang,Huan Wang,Yang Yang,Longhai Jin,Yang Liu,Ying Wang,Xiangyu Yan,Jing Xu,Ruoqian Gao,Pengpeng Lei,Junjie Zhu,Yinghui Wang,Shuyan Song,Hongjie Zhang
出处
期刊:Advanced Materials [Wiley]
卷期号:31 (46) 被引量:128
标识
DOI:10.1002/adma.201904836
摘要

Photothermal therapy triggered by near-infrared light in the second biowindow (NIR-II) has attracted extensive interest owing to its deeper penetration depth of biological tissue, lower photon scattering, and higher maximum permissible exposure. In spite of noble metals showing great potential as the photothermal agents due to the tunable localized surface plasmon resonance, the biological applications of platinum are rarely explored. Herein, a monocomponent hollow Pt nanoframe ("Pt Spirals"), whose superstructure is assembled with three levels (3D frame, 2D layered shells, and 1D nanowires), is reported. Pt Spirals exhibit outstanding photothermal conversion efficiency (52.5%) and molar extinction coefficients (228.7 m2 mol-1 ) in NIR-II, which are much higher than those of solid Pt cubes. Simulations indicate that the unique superstructure can be a significant cause for improving both adsorption and the photothermal effect simultaneously in NIR-II. The excellent photothermal effect is achieved and subsequently verified in in vitro and in vivo experiments, along with superb heat-resistance properties, excellent photostability, and a prominent effect on computed tomography (CT) imaging, demonstrating that Pt Spirals are promising as effective theranostic platforms for CT imaging-guided photothermal therapy.
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