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Spatiotemporal Control of Crystal Growth of Organic Compounds by Femtosecond Laser Ablation II ~ Laser Energy Dependence~

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Abstract

Crystallization is crucial for various experimental processes such as purification, crystalline devices, and determination of molecular structures by X-ray/Neutron diffraction. The preparation of crystals with appropriate size and shape is one of the important factors for the success of the above-mentioned processes. In general, researchers try to make such crystals by optimizing the environmental parameters such as temperature, solvents, and additives. On the other hand, our group has recently succeeded in the control of protein crystal growth by directly modifying the local crystal structures via femtosecond laser ablation [1]. Here the key is to induce the spiral growth mode, which is energetically advantageous compared to the spontaneous 2D nucleation growth mode. In the previous account, we reported that this technique can also be applied to crystals of a low-weight organic compound, glycine [2]. In this work, we systematically investigated the dependence of laser energy on the organic crystal growth to explore the optimized condition for the preparation of crystals with desired size and shape.

© 2017 Japan Society of Applied Physics, Optical Society of America

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