A Novel Top‐Down Synthesis of Ultrathin 2D Boron Nanosheets for Multimodal Imaging‐Guided Cancer Therapy |
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Authors: | Xiaoyuan Ji Na Kong Junqing Wang Wenliang Li Yuling Xiao Silvia Tian Gan Ye Zhang Yujing Li Xiangrong Song Qingqing Xiong Sanjun Shi Zhongjun Li Wei Tao Han Zhang Lin Mei Jinjun Shi |
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Affiliation: | 1. School of Pharmaceutical Sciences (Shenzhen), Sun Yat‐sen University, Guangzhou, China;2. Center for Nanomedicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA;3. Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China;4. Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics, SZU‐NUS Collaborative Innovation Center for Optoelectronic Science and Technology,, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China |
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Abstract: | Single atom nonmetal 2D nanomaterials have shown considerable potential in cancer nanomedicines, owing to their intriguing properties and biocompatibility. Herein, ultrathin boron nanosheets (B NSs) are prepared through a novel top‐down approach by coupling thermal oxidation etching and liquid exfoliation technologies, with controlled nanoscale thickness. Based on the PEGylated B NSs, a new photonic drug delivery platform is developed, which exhibits multiple promising features for cancer therapy and imaging, including: i) efficient NIR‐light‐to‐heat conversion with a high photothermal conversion efficiency of 42.5%, ii) high drug‐loading capacity and triggered drug release by NIR light and moderate acidic pH, iii) strong accumulation at tumor sites, iv) multimodal imaging properties (photoacoustic, photothermal, and fluorescence imaging), and v) complete tumor ablation and excellent biocompatibility. As far as it is known, this is the first report on the top‐down fabrication of ultrathin 2D B NSs by the combined thermal oxidation etching and liquid exfoliation, as well as their application as a multimodal imaging‐guided drug delivery platform. The newly prepared B NSs are also expected to provide a robust and useful 2D nanoplatform for various biomedical applications. |
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Keywords: | 2D nanosheets boron cancer therapy multimodal imaging nanomedicine |
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