Li Shuai, Xie Xiongfei, Liu Yao
Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, People's Republic of China.
Sci Rep. 2024 Apr 5;14(1):8051. doi: 10.1038/s41598-024-58558-x.
Non-photochemical laser-induced nucleation (NPLIN) in supersaturated potassium bromide (KBr) solutions with the addition of acidic polymers is reported here for the first time. Upon absorbing the incident laser, crystallites are immediately induced along the laser pathway in the solution, eventually growing into needle-shaped crystals of varying sizes. When comparing induction time, nucleation probability, and crystal habits with spontaneous nucleation, the results suggest that NPLIN creates a distinct morphological pathway, transforming cubic crystals into needle-like structures. Additionally, it improves crystallization probability and growth rate. This paper aims to realize control from crystal nucleation to crystal growth by adding acidic polymers to the process of laser-induced nucleation, potentially influencing crystal morphology modification in NPLIN. With 19 wt% acidic polymers added to the solution as additives, control over both crystal growth and morphological modifications was observed: cubic KBr crystals with square patterns were produced through laser irradiation, and there was a varying reduction in both the number and growth rate of the crystals. The influence of acidic polymers on the solution environment was analyzed to determine the reasons for the variations in crystal quantity and growth speed. The underlying mechanisms responsible for the changes in crystal shape were also discussed.
本文首次报道了在添加酸性聚合物的过饱和溴化钾（KBr）溶液中进行的非光化学激光诱导成核（NPLIN）。吸收入射激光后，溶液中会立即沿激光路径诱导微晶形成，最终生长成不同尺寸的针状晶体。将诱导时间、成核概率和晶体习性与自发成核进行比较时，结果表明NPLIN创造了一种独特的形态学途径，将立方晶体转变为针状结构。此外，它还提高了结晶概率和生长速率。本文旨在通过在激光诱导成核过程中添加酸性聚合物来实现从晶体成核到晶体生长的控制，这可能会影响NPLIN中的晶体形态修饰。当向溶液中添加19 wt%的酸性聚合物作为添加剂时，观察到对晶体生长和形态修饰的控制：通过激光照射产生了具有方形图案的立方KBr晶体，并且晶体的数量和生长速率均有不同程度的降低。分析了酸性聚合物对溶液环境的影响，以确定晶体数量和生长速度变化的原因。还讨论了晶体形状变化的潜在机制。
