Du Ruifeng, Liu Wei, Bai Hua, Wang Hongtao, Xi Guangcheng
School of Chemical and Material Engineering, Fuyang Normal University Fuyang 236037 China
Institute of Industrial and Consumer Product Safety, Chinese Academy of Inspection and Quarantine No. 11, Ronghua South Road Beijing 100176 P. R. China
RSC Adv. 2020 Jan 10;10(4):2075-2084. doi: 10.1039/c9ra09147e. eCollection 2020 Jan 8.
γ-TiO is one kind of prominent non-stoichiometric metal oxide due to its intriguing ability in electric and electrochemical behaviors. This work reports another attractive property of γ-TiO hierarchical porous microspheres, the extremely effective photothermal property with a high photothermal conversion efficiency. Theory and experimental results indicate that γ-TiO hierarchical porous microspheres possess metallic features and display very strong localized surface plasma resonance effects over the visible and near-infrared region. Under simulated sunlight or near infrared light, the metallic γ-TiO exhibits a photothermal conversion efficiency of up to 65.29%. Under irradiation by a near-infrared laser with a wavelength of 808 nm, the γ-TiO hierarchical porous microspheres can significantly inhibit cancer cell viability and disrupt tumor tissue growth in a short period. and toxicity experiments demonstrate that it has good biocompatibility. The ultrahigh photothermal conversion efficiency and biocompatibility make the γ-TiO very attractive for technological uses in photothermal therapy, solar energy utilization, and infrared light detection and so on.
γ-TiO是一种突出的非化学计量金属氧化物，因其在电学和电化学行为方面具有引人关注的能力。本文报道了γ-TiO分级多孔微球的另一个吸引人的特性，即具有极高的光热性能和高光热转换效率。理论和实验结果表明，γ-TiO分级多孔微球具有金属特性，在可见光和近红外区域表现出非常强的局域表面等离子体共振效应。在模拟阳光或近红外光照射下，金属性的γ-TiO光热转换效率高达65.29%。在波长为808 nm的近红外激光照射下，γ-TiO分级多孔微球能在短时间内显著抑制癌细胞活力并破坏肿瘤组织生长。毒性实验表明它具有良好的生物相容性。超高的光热转换效率和生物相容性使得γ-TiO在光热治疗、太阳能利用和红外光探测等技术应用方面极具吸引力。
