Spatiotemporally Synchronous Oxygen Self-Supply and Reactive Oxygen Species Production on Z-Scheme Heterostructures for Hypoxic Tumor Therapy.

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ID: 92097
2020
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Abstract
Photodynamic therapy (PDT) efficacy has been severely limited by oxygen (O ) deficiency in tumors and the electron-hole separation inefficiency in photosensitizers, especially the long-range diffusion of O toward photosensitizers during the PDT process. Herein, novel bismuth sulfide (Bi S )@bismuth (Bi) Z-scheme heterostructured nanorods (NRs) are designed to realize the spatiotemporally synchronous O self-supply and production of reactive oxygen species for hypoxic tumor therapy. Both narrow-bandgap Bi S and Bi components can be excited by a near-infrared laser to generate abundant electrons and holes. The Z-scheme heterostructure endows Bi S @Bi NRs with an efficient electron-hole separation ability and potent redox potentials, where the hole on the valence band of Bi S can react with water to supply O for the electron on the conduction band of Bi to produce reactive oxygen species. The Bi S @Bi NRs overcome the major obstacles of conventional photosensitizers during the PDT process and exhibit a promising phototherapeutic effect, supplying a new strategy for hypoxic tumor elimination.
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cheng2020spatiotemporallyadvanced Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Cheng, Yan;Kong, Xiangpeng;Chang, Yun;Feng, Yanlin;Zheng, Runxiao;Wu, Xiaqing;Xu, Keqiang;Gao, Xingfa;Zhang, Haiyuan;
Journal advanced materials (deerfield beach, fla)
Year 2020
DOI
10.1002/adma.201908109
URL
Keywords
reactive oxygen species photodynamic therapy z-scheme heterostructures hypoxic tumors oxygen self-supply

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