中文摘要：

制备了粒径均一的纳米金颗粒,再对其表面进行叶酸修饰,制得具有靶向性的纳米金探针.利用激光扫描共聚焦显微镜（LSCM）,对靶向性纳米金的细胞特异性散射成像进行研究.实验结果表明,人宫颈癌细胞（Hela）对纳米金-叶酸的摄取作用强于对纳米金的摄取,但随着时间的延长,两者的差别逐渐减小.表明在适当的时间内纳米金-叶酸探针对宫颈癌细胞具有良好的靶向性.

英文摘要：

The quantities and activities of folate receptor are higher in tumor cells than those in normal cells,so it has become the ideal ligand for targeted therapy of tumor.Due to the unique optical property of gold nanoparticles（AuNPs）,the scattering light from AuNPs can be detected when they are excited by a single laser.Based on these principles,in this study AuNPs with uniform size were prepared,then modified with folic acid（FA）,the resulting AuNPs-FA were used as targeting probes for imaging of cervical cancer cells（Hela）.The specific scattering imaging could be researched by laser scanning confocal microscopy（LSCM）.The results show that the effect of intaking of AuNPs-FA is stronger than that of AuNPs by the cervical cancer cells.However,with the extension of time,the difference will gradually decrease.So the AuNPs-FA has a good targeting property to label the cervical cancer cells in the right time.