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Nucleation And Growth Of Cuso_4·5h_2o Crystals On The Liquid State Stearic Acid Langmuir-blodgett Film

机译:液态硬脂酸Langmuir-blodgett膜上Cuso_4·5h_2o晶体的成核与生长

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Oriented crystallization of CuSO_4·5H_2O on a Langmuir-Blodgett (LB) film of stearic acid has been studied in the temperature ranges of 73-68℃ and 53-20℃, respectively. This is the first time that the LB film at temperature above its melting point has been served as a template to induce nucleation and growth of crystals. The experimental results demonstrated that the LB film in the liquid state has the ability of directing the nucleation and growth of crystals. Moreover, X-ray diffraction patterns of the as-prepared crystals revealed that the orientation of the attached crystals on the LB film is affected by temperature greatly. The (122) peak is very strong in crystals grown at higher temperature but absent at lower temperature. These results implied that structural changes in the LB film tuned by temperature determine the orientation of the attached crystals. The morphologies of the crystals showed that the orientation changes of the attached crystals influence the shapes and colors of CuSO_4·5H_2O crystals strongly.
机译:分别在73-68℃和53-20℃的温度范围内研究了CuSO_4·5H_2O在硬脂酸的Langmuir-Blodgett(LB)膜上的定向结晶。这是第一次将LB膜在高于其熔点的温度下用作诱导晶体成核和生长的模板。实验结果表明,液态的LB膜具有引导晶体成核和生长的能力。此外,所制备晶体的X射线衍射图表明,LB膜上附着的晶体的取向受温度的影响很大。 (122)峰在较高温度下生长的晶体中非常强,但在较低温度下不存在。这些结果表明,LB膜的结构变化受温度调节决定了所附着晶体的取向。晶体的形貌表明,附着的晶体的取向变化强烈影响CuSO_4·5H_2O晶体的形状和颜色。

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