Lanthanide oxides are ideal candidates as photothermal conversion agents owing to their larger photon energy and advantages in biomedical applications. However, the small absorption cross section of rare earth is not conducive of absorbing near infrared light, which will affect the photothermal conversion efficiency of lanthanide oxides. Herein, Au particles are successfully introduced into Sm₂O₃ to form Au/Sm₂O₃ composites. The investigation of broadband emission and thermal performances in Sm₂O₃ and Au/Sm₂O₃ composites confirm the ultra‐broad plasmon absorption of Au induced thermal effect is in favor of the formation of broadband emission, meanwhile, enhances the photothermal conversion capability of Au/Sm₂O₃ composites. The temperature increases of the Au/Sm₂O₃ composites are 5.5°C and 19.6°C compared to Sm₂O₃ particles under the irradiation of near infrared laser with power density of 11.5 and 29.0 mW/mm², respectively. In additional, the enhanced photothermal conversion effect is confirmed by the alcohol volatilization experiment and visual infrared thermal images. We present here an idea for enhancing the photothermal conversion capabilities of lanthanide oxides and highlight the promise of using this kind of materials for photothermal therapy.

中文翻译：

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Au / Sm2O3复合材料中超宽等离子体吸收Au增强光热转换性能

镧系元素氧化物由于具有更大的光子能量和在生物医学应用中的优势，因此是光热转换剂的理想选择。但是，稀土的吸收截面小，不利于吸收近红外光，这会影响镧系元素氧化物的光热转化效率。在此，将Au颗粒成功地引入Sm ₂ O _3中以形成Au / Sm ₂ O ₃复合材料。Sm ₂ O ₃和Au / Sm ₂ O ₃中宽带发射和热性能的研究复合材料证实超宽等离子体吸收Au诱导的热效应有利于宽带发射的形成，同时增强了Au / Sm ₂ O ₃复合材料的光热转化能力。在功率密度分别为11.5和29.0 mW / mm ²的近红外激光照射下，Au / Sm ₂ O ₃复合材料的温度升高比Sm ₂ O ₃颗粒高5.5°C和19.6°C。， 分别。另外，通过醇挥发实验和可见的红外热图像证实了增强的光热转化效果。我们在此提出一种增强镧系元素氧化物的光热转化能力的想法，并强调使用这种材料进行光热疗法的前景。