中文摘要：

通过两步还原法制备了导电石墨烯薄膜。采用XPS、Raman等表征了薄膜的结构；采用四探针电阻仪表征了薄膜电学性能。结果表明：用两步法制备的石墨烯薄膜具有更高的还原程度，其碳和氧的原子比达8．9：1；薄膜的方块电阻为0．42kΩ／□，而同等厚度的一次还原薄膜的方块电阻为5．57kΩ／□。

英文摘要：

The grahene film with high electrical conductivity was fabricated via two-step reduction method. The structure of the films were studied by means of XPS, Raman, and the electrical property was investigated by four probe resistance measurement instrument. The results show that graphene film fabricated through the two-step reduction method has higher reduction degree than that only reduced by hydrazine hydrate. The atomic ratio of C to O in the graphene film is 8. 9. The sheet resistance of graphene film is 0.42 kΩ/□, which is much lower than that of the film reduced by hydrazine hydrate with the same thickness （5.57 kΩ/□）.