Reduced Graphene Oxides Modified Bi2Te3 Nanosheets for Rapid Photo-Thermoelectric Catalytic Therapy of Bacteria-Infected Wounds |
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| Authors: | Siyu Wang Yuqian Qiao Xiangmei Liu Shengli Zhu Yufeng Zheng Hui Jiang Yu Zhang Jie Shen Zhaoyang Li Yanqin Liang Zhenduo Cui Paul K. Chu Shuilin Wu |
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| Affiliation: | 1. School of Materials Science & Engineering, the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin, 300072 China;2. School of Materials Science & Engineering, Peking University, Beijing, 100871 China;3. School of Health Science and Biomedical Engineering, Hebei University of Technology, Xiping Avenue 5340, Beichen District, Tianjin, 300401 China;4. Department of Orthopedics, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080 China;5. Shenzhen Key Laboratory of Spine Surgery, Department of Spine Surgery, Peking University Shenzhen Hospital, Shenzhen, 518035 China;6. Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, 999077 China |
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| Abstract: | Temperature variation-induced thermoelectric catalytic efficiency of thermoelectric material is simultaneously restricted by its electrical conductivity, Seebeck coefficient, and thermal conductivity. Herein, Bi2Te3 nanosheets are in situ grown on reduced graphene oxides (rGO) to generate an efficient photo-thermoelectric catalyst (rGO-Bi2Te3). This system exhibits phonon scattering effect and extra carrier transport channels induced by the formed heterointerface between rGO and Bi2Te3, which improves the power factor value and reduces thermal conductivity, thus enhancing the thermoelectric performance of 2.13 times than single Bi2Te3. The photo-thermoelectric catalysis of rGO-Bi2Te3 significantly improves the reactive oxygen species yields, resulting from the effective electron–hole separation caused by the unique thermoelectric field and heterointerfaces of rGO-Bi2Te3. Correspondingly, the electrospinning membranes containing rGO-Bi2Te3 nanosheets exhibit high antibacterial efficiency in vivo (99.35 ± 0.29%), accelerated tissue repair ability, and excellent biosafety. This study provides an insight into heterointerface design in photo-thermoelectric catalysis. |
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| Keywords: | antibacterial Bi2Te3 catalyses photo-thermoelectric wound healing |
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