Abstract This study reports a new habit for the hexadecanoic-acid crystal, which was obtained using slow evaporation method from mixture of L-lysine hydrochloride and hexadecanoic acid in ethanol solution. All the morphological, structural, vibrational and thermal characteristics were investigated through scanning electron microscopy (SEM), X-ray diffraction, Fourier-transform infrared (FT-IR) and Raman spectroscopy, and differential scanning calorimetry techniques. The crystals were grown with transparent thin blade-like shapes, as indicated by the SEM images. From the spectroscopic analyses, we observed that hexadecanoic-acid molecules within the unit cell have adopted all-trans conformations between dimer groups formed through the hydrogen bonds, thus indicating that during the growth process the crystal has acquired a new habit which is different from those previously reported by literature.

中文翻译：

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通过 SEM 结合 XRD、FT-IR 和拉曼研究观察到的十六烷酸晶体的新叶片习性

摘要 本研究报道了一种十六烷酸晶体的新习性，它是由L-赖氨酸盐酸盐和十六烷酸在乙醇溶液中的混合物采用缓慢蒸发法获得的。通过扫描电子显微镜 (SEM)、X 射线衍射、傅里叶变换红外 (FT-IR) 和拉曼光谱以及差示扫描量热技术研究了所有的形态、结构、振动和热特性。如 SEM 图像所示，晶体生长成透明的薄叶片状形状。从光谱分析中，我们观察到晶胞内的十六烷酸分子在通过氢键形成的二聚体之间采用全反式构象，