通过X射线XRD、红外光谱FTIR、扫描电镜SEM、透射电镜TEM等分析手段，研究了十六胺有机膜对羟基磷灰石（HA）晶体结构、形核、晶体形貌和结晶学定向生长的调控作用及其机理。结果表明：无有机膜时，生成物为磷酸八钙（OCP）和羟基磷灰石（HA）的混合物，其生长速率很慢且晶体排列无一定规则；而在十六胺有机膜调控下，生成物为规则排列的、沿<0001>定向生长的、结晶良好的纳米片状羟基磷灰石晶体，且其形核和生长速度均很快。分析表明：十六胺有机膜上带有大量极性强、电荷密度高的-NH3基团，它们通过静电作用在有机膜/溶液界面处形成局域过饱和浓度，促进羟基磷灰石晶体形核；另一方面，十六胺有机膜的二维晶格尺寸与HA（0001）面的晶格参数具有非常良好的匹配关系，构造了一个有利于HA 以（0001）面形核生长的结构框架，从而促进了HA相沿<0001>方向定向生长。
The crystal growth of hydroxyapatite (HAp) in the presence of hexadecylamine was investigated by the patterns of X-ray diffractions (XRD), Fourier transformed infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and selected-area diffraction (SAD) in this work. Results show that: due to its high polarity and high charged density, the organic film could increased the ions supersaturation on its surface, thus leading to a fast growth of pure HAp crystals. Moreover, the positive headgroups in the organic film could act as recognized nucleation sites and orient the growth of HAp crystals along <0001> direction.
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