中文摘要：

利用水热合成方法,在含有氨基酸结构的阴离子表面活性剂N-酰基十二烷基肌氨酸钠（Sar-Na）的控制下,合成具有较大长径比（aspect ratio）的片状纳米羟基磷灰石晶体.采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射（XRD）和傅立叶变换红外（FTIR）光谱表征,并分析了合成产物的形貌、结构和组成.结果表明,在Sar-Na的调控下合成了长度0.5-1.0μm、宽约30nm的片状羟基磷灰石晶体,其长径比约为20：1.考察了表面活性剂Sar-Na的用量对羟基磷灰石形貌的影响.随着Sar-Na的添加及用量的增加,羟基磷灰石由椭圆形变为长片状,并且片的两端逐渐变尖.结果显示了Sar-Na对羟基磷灰石形貌的控制作用,为合成具有较大长径比的羟基磷灰石纳米片提供了一个新的途径.

英文摘要：

By hydrothermal reaction method with the control of anionic amino acid surfactant N-lauroylsarcosine sodium（Sar-Na）,single crystal hydroxyapatite（HAP） nanoplates were synthesized and different synthetic conditions were carefully studied.The products were characterized by scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,X-ray diffraction（XRD）,and Fourier transform infrared（FTIR） spectroscopy.Results showed that hydroxyapatite nanocrystals with lengths of 0.5-1.0 μm,a width of 30 nm,and a high aspect ratio（20：1） were obtained.By increasing the concentration of N-lauroylsarcosine sodium,the morphology of the hydroxyapatite varied from oval to plate-like.These results show that N-lauroylsarcosine sodium can induce the formation of hydroxyapatite with different morphologies.The current work provides a new approach to tune the aspect ratio of hydroxyapatite nanoplates.