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Control of Organic Crystal Shape by Femtosecond Laser Ablation

机译:通过飞秒激光烧蚀控制有机晶体形状

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摘要

Control of organic crystal shape is crucial for various scientific and industrial fields, while it is still very challenging even with systematic optimization of environmental parameters such as temperature and concentration. Here we report an innovative approach for spatiotemporal control of organic crystal growth by directly modifying local crystal structures via femtosecond laser ablation. We found that a crystal face that is locally ablated only with a single laser pulse shows enhanced growth without the loss of crystal quality. The underlying mechanism can be explained by the generation of energetically favorable crystal growth mode (spiral growth mode), which is a fundamental growth mode for various organic crystals. We demonstrated that various crystal shapes can be achieved by femtosecond laser ablation. The fine-tuned, spatiotemporal cue given by femtosecond laser ablation will provide a facile means to obtain organic crystals with desired shape.
机译:控制有机晶体形状对于各种科学和工业领域至关重要,而且仍然非常具有挑战性,即使环境参数如温度和浓度,也仍然非常具有挑战性。 在这里,我们通过飞秒激光烧蚀直接改变局部晶体结构来报告一种创新的有机晶体生长的时尚控制。 我们发现仅用单个激光脉冲局部消融的晶体面显示增强的生长而不会损失晶体质量。 潜在的机制可以通过产生能量良好的晶体生长模式(螺旋生长模式)来解释,这是各种有机晶体的基本生长模式。 我们证明,通过飞秒激光消融可以实现各种晶体形状。 由Femtosecond激光消融给出的微调的时空辐射将提供一种容易装置,用于获得具有所需形状的有机晶体。

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