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Ren, Wenzhi; Yan, Yong; Zeng, Leyong; Shi, Zhenzhi; Gong, An; Schaaf, Peter; Wang, Dong; Zhao, Jinshun; Zou, Baobo; Yu, Hongsheng; Chen, Ge; Brown, Eric Michael Bratsolias; Wu, Aiguo
Advanced healthcare materials, July 15, 2015, Letnik: 4, Številka: 10Journal Article
White TiO2 nanoparticles (NPs) have been widely used for cancer photodynamic therapy based on their ultraviolet light-triggered properties. To date, biomedical applications using white TiO2 NPs have been limited, since ultraviolet light is a well-known mutagen and shallow penetration. This work is the first report about hydrogenated black TiO2 (H-TiO2 ) NPs with near infrared absorption explored as photothermal agent for cancer photothermal therapy to circumvent the obstacle of ultraviolet light excitation. Here, it is shown that photothermal effect of H-TiO2 NPs can be attributed to their dramatically enhanced nonradiative recombination. After polyethylene glycol (PEG) coating, H-TiO2 -PEG NPs exhibit high photothermal conversion efficiency of 40.8%, and stable size distribution in serum solution. The toxicity and cancer therapy effect of H-TiO2 -PEG NPs are relative systemically evaluated in vitro and in vivo. The findings herein demonstrate that infrared-irradiated H-TiO2 -PEG NPs exhibit low toxicity, high efficiency as a photothermal agent for cancer therapy, and are promising for further biomedical applications.
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in: SICRIS
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