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首页> 外文期刊>Crystal growth & design >Laser-induced morphology control and epitaxy of dipara-anthracene produced from the photochemical reaction of anthracene
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Laser-induced morphology control and epitaxy of dipara-anthracene produced from the photochemical reaction of anthracene

机译：蒽的光化学反应产生的对二蒽的激光诱导形貌控制和外延

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摘要

Laser-induced crystal growth and morphology control were observed by irradiation of anthracene in saturated acetonitrile solution. The crystal was composed of dipara-anthracene (DPA), which is a product of intermolecular [4+4] photocycloaddition of anthracene. Polyhedral, skeletal, and dendrite morphologies were controlled by laser fluence. In a suspension system with anthracene microcrystals, laser-induced epitaxy of the photoproduct on the mother anthracene substrate was observed. The a and b axes of the (001) surface of DPA are parallel to the b and a axes of the monoclinic anthracene (001) surface. EpiCalc calculations indicated that almost perfect lattice matching exists between the (1 x 2) supercell dimension at an angle 90 degrees, which is in good agreement with the experimental results. Epitaxy was formed by 2-D nucleation of DPA, which was produced in the solution phase and was brought about by diffusion.
机译：通过在饱和乙腈溶液中照射蒽，观察到激光诱导的晶体生长和形貌控制。该晶体由二对蒽（DPA）组成，该分子是蒽的分子间[4 + 4]光环加成反应的产物。多面，骨骼和枝晶形态受激光能量密度控制。在具有蒽微晶的悬浮系统中，观察到母蒽基质上光产物的激光诱导外延。 DPA（001）表面的a轴和b轴平行于单斜蒽（001）表面的b轴。 EpiCalc计算表明，（1 x 2）超级单元尺寸之间以90度角存在几乎完美的晶格匹配，这与实验结果非常吻合。外延是由DPA的2D成核作用形成的，DPA是在固溶相中产生的，并通过扩散而产生。

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