中文摘要：

一种DNA-金纳米粒子导电复合物被成功的制备并应用于癌胚抗原（CEA）的早期检测中。该导电复合物网状结构的制备主要基于DNA中呈负电性的磷酸骨架与带正电荷的金纳米粒子之间的静电自组装技术。测试结果显示，该纳米复合物可以很好的检测癌胚抗原，且检测浓度达到了5ng／mL，从而为癌症的早期检测奠定了基础。

英文摘要：

The polyaniline coated gold nanoparticles with positive charges were synthesized by a simple chemical reduction and used for detection of early carcinoma. The gold nanoparticles with positive charges could be assembled along λ-DNA molecules via electrostatic interaction. The results of detection of carcinoemhryonic antigen （CEA） indicated that the synthesized DNA-gold nanoparticles networks could be a possible candidate of detecting early cancer.