The carbon nanotubes (CNTs) have been successfully modified to absorb in near‐infrared (NIR) region by synergetic functionalization with an important biopolymer, polylactic acid (PLA) and subsequent in‐situ deposition of Pd nanoparticles. This process has also extended the absorption ability of Pd nanoparticles towards NIR region apart from its classical absorption in UV and visible regions. Thus fabricated CNTs‐PLA‐Pd demonstrated excellent photothermal effect under exposure to 980 nm laser and significant stability against photo‐bleaching and corrosiveness. A stepwise increment in the photothermal effect of CNTs was attained by covalent grafting of PLA and successive deposition of Pd nanoparticles. The photothermal effect of CNTs‐PLA‐Pd was proportional to its concentration level and photothermal conversion efficiency calculated for CNTs‐PLA‐Pd was 26.5 %. The photothermal effect of CNTs‐PLA‐Pd under illumination to 980 nm laser was higher than that of 808 nm laser. The temperature attained during photothermal effect for CNTs‐PLA‐Pd was beyond 60 °C, which far exceeds the temperature survival level of cancer cells. Overall, the rational integration of CNTs, PLA and Pd nanoparticles in CNTs‐PLA‐Pd by reported strategy could offer a suitable avenue for advancement of cancer therapy.

中文翻译：

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聚乳酸和钯纳米粒子在碳纳米管增强光热效应中的贡献

通过与重要的生物聚合物，聚乳酸（PLA）和随后的原位协同功能化，成功地修饰了碳纳米管（CNTs）以在近红外（NIR）区域吸收钯纳米粒子的沉积。除了其在紫外线和可见光区域的经典吸收以外，该过程还使Pd纳米颗粒对NIR区域的吸收能力得到了扩展。如此制成的CNTs-PLA-Pd在980 nm激光照射下表现出出色的光热效应，并且对光漂白和腐蚀具有显着的稳定性。通过共价接枝PLA和连续沉积Pd纳米粒子，可以实现CNTs光热效应的逐步增加。CNTs-PLA-Pd的光热效应与其浓度成正比，计算得出的CNTs-PLA-Pd的光热转化率为26.5％。在980 nm激光照射下，CNTs-PLA-Pd的光热效应高于808 nm激光。CNTs-PLA-Pd在光热作用期间达到的温度超过60°C，远远超过了癌细胞的温度存活水平。总体而言，通过报告的策略将CNTs，PLA和Pd纳米粒子合理地整合到CNTs-PLA-Pd中可以为癌症治疗的发展提供合适的途径。