Laser ablation of zircon can be used to analyze its composition for geological history. However, the effect of laser properties on nanoparticle size has not been studied extensively. The effect of laser fluence and pulse duration on the diameter of zircon nanoparticles was analyzed using field-emission scanning electron microscopy and energy dispersive spectroscopy. The results showed that the diameters of the zircon nanoparticles induced by a femtosecond laser increased with increasing laser fluence, and that these particles were smaller than those induced by a nanosecond laser with the same laser fluence. Furthermore, the mechanism of zircon nanoparticle formation induced by laser ablation has been discussed. The explosion mechanism is the primary mechanism of nanoparticle generation. In particular, the zircon nanoparticles induced by the femtosecond laser were the result of Coulomb explosion, while phase explosion contributed to the zircon nanoparticles induced by the nanosecond laser. Therefore, the nature of zircon nanoparticles induced by laser ablation is mainly determined by the pulse duration.

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飞秒和纳秒激光烧蚀锆石过程中形成的纳米颗粒尺寸的研究

锆石的激光烧蚀可用于分析其地质历史的成分。然而，激光特性对纳米颗粒尺寸的影响尚未得到广泛研究。使用场发射扫描电子显微镜和能量色散光谱分析了激光能量密度和脉冲持续时间对锆石纳米颗粒直径的影响。结果表明，飞秒激光诱导的锆石纳米粒子的直径随着激光能量密度的增加而增加，并且这些粒子小于具有相同激光能量密度的纳秒激光诱导的粒子。此外，还讨论了激光烧蚀诱导锆石纳米颗粒形成的机制。爆炸机制是纳米粒子产生的主要机制。特别是，飞秒激光诱导的锆石纳米粒子是库仑爆炸的结果，而纳秒激光诱导的锆石纳米粒子则是相爆炸的结果。因此，激光烧蚀诱导的锆石纳米粒子的性质主要由脉冲持续时间决定。