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首页> 外文期刊>Optical and quantum electronics >Femtosecond laser surface engineering of biopolymer ceramic scaffolds coated with ZnO by low temperature atomic layer deposition method
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Femtosecond laser surface engineering of biopolymer ceramic scaffolds coated with ZnO by low temperature atomic layer deposition method

机译：低温原子层沉积法涂覆ZnO的生物聚合物陶瓷支架的飞秒激光表面工程

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摘要

Surface femtosecond laser texturing of biopolymer and biopolymer/ceramic composites with subsequent ZnO film deposition on the samples by low temperature Atomic Layer Deposition (ALD) method was performed. In the current study, the deposition of ZnO layers was implemented at temperature 50 ℃ under pressure of 2 mbar. In order to investigate the effect of diverse ZnO thin films thickness, 100 or 500 repeating ALD cycles were applied. The samples were exposed to ultra-short laser pulses of 130 fs duration generated by a CPA (chirped pulse amplifier) Ti: Sapphire laser system. The artificial scaffolds were irradiated by varying the laser fiuence (0.2 J/cm~2,0.41 I/cm~2 and 2.07 J/cm~2) and the number of applied laser pulses (N = 1, 2, 5 and 10). The morphology and chemical properties of the treated samples were evaluated by Scanning Electronic Microscopy, Energy-Dispersive X-ray Spectroscopy and X-ray photoelectron spectroscopy. By combining fs laser modification with low temperature ALD method, essentially improved bioactivity properties of hybrid organic-inorganic bone tissue scaffolds could be achieved, which is of great importance for future tissue engineering application of the samples.
机译：通过低温原子层沉积（ALD）方法对生物聚合物和生物聚合物/陶瓷复合材料进行表面飞秒激光织构化，随后在样品上沉积ZnO膜。在目前的研究中，ZnO层的沉积是在50℃，2 mbar的压力下进行的。为了研究不同的ZnO薄膜厚度的影响，应用了100或500个重复的ALD循环。样品暴露于CPA（chi脉冲放大器）Ti：Sapphire激光系统产生的130 fs持续时间的超短激光脉冲中。通过改变激光强度（0.2 J / cm〜2、0.41 I / cm〜2和2.07 J / cm〜2）和施加的激光脉冲数（N = 1、2、5和10）来照射人造支架。 。通过扫描电子显微镜，能量色散X射线光谱法和X射线光电子能谱评价处理过的样品的形态和化学性质。通过将fs激光修饰与低温ALD方法相结合，可以显着提高杂化有机-无机骨组织支架的生物活性，这对于样品的未来组织工程应用具有重要意义。

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