Single femtosecond laser pulse-single crystal formation of glycine at the solution surface
Single femtosecond laser pulse-single crystal formation of glycine at the solution surface
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DOI：
10.1016/j.jcrysgro.2012.11.018
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发表时间：
2013-03-01
影响因子：
1.8
通讯作者：
Chen, Chun-Jung
中科院分区：
文献类型：
--
作者：
Liu, Tsung-Han;Uwada, Takayuki;Chen, Chun-Jung
我们展示了飞秒激光诱导结晶甘氨酸从其过饱和溶液依赖于激光可调谐参数（脉冲能量和重复率）和焦点位置，并检查结晶概率，晶体形态，和晶体多晶型。水的多光子吸收产生的空化泡取决于输入激光脉冲的能量和重复频率，这强烈地决定了所获得的晶体的形态和数量。通过将飞秒激光脉冲照射到空气/溶液界面，观察到结晶概率的显著增加，并且成功地实现了单脉冲诱导的单晶形成。从空化气泡产生引起的不均匀机械应力和表面分子组装特性的角度讨论了结晶机理。(C)2012爱思唯尔有限公司版权所有。
We demonstrate femtosecond laser-induced crystallization of glycine from its supersaturated solution depending on laser tunable parameters (pulse energy and repetition rate) and focal position, and examine the crystallization probability, crystal morphology, and crystal polymorph. The generation of cavitation bubble through multiphoton absorption of water depends on input laser pulse energy and repetition rate, which strongly determine morphology and number of the obtained crystals. Significant increase in the crystallization probability is observed by irradiating the femtosecond laser pulses to the air/solution interface, and single pulse-induced single crystal formation is successfully achieved. The crystallization mechanism is discussed in view of inhomogeneous mechanical stress induced by cavitation bubble generation and molecular assembly characteristics of the surface. (C) 2012 Elsevier B.V. All rights reserved.