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Thermoelectric Nanoheterojunction-Mediated Multiple Energy Conversion for Enhanced Cancer Therapy

Yanlin ZhuKey Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. ChinaQingyu HaoHaixia ZhuCancer Institute, Affiliated Tumor Hospital of Nantong University, Nantong 226631, P. R. ChinaRuoxi ZhaoKey Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. ChinaLili FengKey Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. ChinaSong HeKey Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. ChinaWenzhuo WangKey Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. ChinaGuanting HeKey Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. ChinaBin LiuKey Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. ChinaPiaoping YangKey Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China

2024en

ABI

Annotatsiya

Electron–hole recombination and exogenous local hypoxia both impede the effectiveness of thermoelectric tumor catalytic therapy. Here, a thermoelectric heterojunction (Pt-TiO2–x/Ti3C2Tx-PEG) was developed to enhance charge carrier separation and alleviate tumor hypoxia. By incorporating titanium oxide with oxygen vacancies and platinum single atoms onto Ti3C2Tx MXene, we not only improve the charge separation efficiency but also prevent the recombination of positive and negative charges generated by the thermoelectric effect, leading to an increased production of reactive oxygen species (ROS). Furthermore, the Pt SAs exhibited excellent catalase-mimicking (CAT-mimicking) activity, catalyzing hydrogen peroxide to generate oxygen and alleviating the hypoxic tumor microenvironment. Titanium oxide with oxygen vacancies also serves as a sonosensitizer for sonodynamic therapy (SDT), enhancing ROS generation in collaboration with thermoelectric catalytic therapy. Moreover, the photothermal conversion efficiency of Pt-TiO2–x/Ti3C2Tx-PEG is augmented by Pt SAs with a surface plasmon resonance effect, further boosting CAT-mimicking activity and thermoelectric catalytic therapy efficacy. This tumor-specific thermoelectric heterojunction integrates thermoelectric therapy, SDT, and photothermal therapy, demonstrating excellent tumor suppression efficacy both in vitro and in vivo. Therefore, this study offers highly valuable and promising insights into utilizing photothermoelectric/ultrasound-mediated methods for cancer treatment.

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Identifikatorlar

DOI: 10.1021/acsnano.4c12261

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