Controlled Growth of Hierarchical Bi_2Se_3/CdSe-Au Nanorods with Optimized Photothermal Conversion and Demonstrations in Photothermal Therapy

Liu Xiao-Dan; Chen Bei; Wang Gang-Gang; Ma Song; Cheng Li; Liu Wei; Zhou Li; Wang Qu-Quan

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Controlled Growth of Hierarchical Bi_2Se_3/CdSe-Au Nanorods with Optimized Photothermal Conversion and Demonstrations in Photothermal Therapy

机译：具有优化的光热转化和光热疗法的优化光热转化和演示，控制增长的增长

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Integrating multiple mechanisms to maximize photothermal conversion efficiency is a significant strategy but remains challenging to construct therapeutic agents toward photothermal tumor treatment. Here, an approach to synthesize asymmetric Bi2Se3/CdSe-Au hierarchical nanorods with excellent photothermal conversion is reported. Ag wetting-layer is firstly grown to help overcome the interfacial lattice mismatch and promote the site-selective growth of AgCdSe onto one end or side surface of Au nanorods. Subsequently, extraction of Ag+ ions out of lattice is observed during cation exchange reaction and epitaxial growth of Bi2Se3 shell. Bi2Se3/CdSe heterojunction with type-II band alignment is formed and located at the plasmonic hotspots of Au nanorods, which experiences enhanced light absorption and accelerates the charge separation of photo-excited carriers. Under excitation of near-infrared 808 nm laser, the matchstick-like Bi2Se3/CdSe-Au nanorods show an excellent photothermal conversion, with 4.3 times temperature increment (Delta T) than that of bare Au nanorods. Moreover, in vitro and in vivo experiments verify them as excellent photothermal therapeutic agents.

机译：整合多种机制以最大化光热转换效率是一种重大策略，但仍然挑战将治疗剂构建朝向光热肿瘤治疗。这里，报道了一种合成具有优异光热转换的非对称BI2SE3 / CDSE-AU分层纳米杆的方法。首先生长Ag润湿层，以帮助克服界面晶格错配并促进AGCDSE的位点选择性生长在Au纳米棒的一端或侧表面上。随后，在阳离子交换反应和Bi2Se3壳的外延生长期间观察到晶格中的Ag +离子的提取。 Bi2Se3 / Cdse异质结具有II型带对准并位于Au纳米棒的等离子体热点，其经历增强的光吸收并加速光激发载体的电荷分离。在近红外线808nm激光激发的情况下，火柴状的Bi2Se3 / Cdse-Au纳米棒显示出优异的光热转化，其温度增量（ΔT）高于裸AU纳米棒。此外，体外和体内实验验证它们作为优异的光热治疗剂。

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来源
《Advanced Functional Materials》 |2021年第43期|2104424.1-2104424.10|共10页
作者
Liu Xiao-Dan; Chen Bei; Wang Gang-Gang; Ma Song; Cheng Li; Liu Wei; Zhou Li; Wang Qu-Quan;
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Wuhan Univ Sch Phys & Technol Minist Educ Key Lab Artificial Micro & Nanostruct Wuhan 430072 Peoples R China;

Wuhan Univ Sch Phys & Technol Minist Educ Key Lab Artificial Micro & Nanostruct Wuhan 430072 Peoples R China;

Wuhan Univ Zhongnan Hosp Wuhan 430072 Peoples R China;

Wuhan Univ Sch Phys & Technol Minist Educ Key Lab Artificial Micro & Nanostruct Wuhan 430072 Peoples R China;

Wuhan Univ Sch Phys & Technol Minist Educ Key Lab Artificial Micro & Nanostruct Wuhan 430072 Peoples R China;

Wuhan Univ Sch Phys & Technol Minist Educ Key Lab Artificial Micro & Nanostruct Wuhan 430072 Peoples R China;

Wuhan Univ Sch Phys & Technol Minist Educ Key Lab Artificial Micro & Nanostruct Wuhan 430072 Peoples R China;

Wuhan Univ Sch Phys & Technol Minist Educ Key Lab Artificial Micro & Nanostruct Wuhan 430072 Peoples R China|Wuhan Univ Inst Adv Studies Wuhan 430072 Peoples R China;

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正文语种 eng
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关键词
photothermal effect; photothermal therapy; surface plasmon; type-II quantum dot;

机译：光热效果;光热疗法;表面等离子体;II型量子点;

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Controlled Growth of Hierarchical Bi_2Se_3/CdSe-Au Nanorods with Optimized Photothermal Conversion and Demonstrations in Photothermal Therapy

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