中文摘要：

碳是最常见的电极材料之一，具有较宽的电势窗范围和丰富的表面化学反应．近年来，一维的纳米碳纤维由于具有较高的电子传导能力和表面活性以及较大的比表面积等优点，被视为制备性能优良的新型电化学生物传感器的电极材料而受到广泛关注。

英文摘要：

In this paper we describe a new method to fabricate TiO2@C core-shell nanofiber arrays for electrochemical sensing.The TiO2@C nanofiber arrays have been produced directly on titanium surface under acetone vapor at 800 ℃.This TiO2@C core-shell nanofiber arrays have the 40 nm TiO2 core in diameter and 5—10 nm carbon shell in thickness and show good electrochemical behaviors.The cyclic voltammogram in 1.0×10-3 mol/L K3Fe（CN）6 is quasi-reversible.The amperometric response increases linearly with the increase of the concentration of dopamine in the range of 1.0×10-7—1.0×10-4 mol/L.The detection limit（S/N=3）of dopamine is 2.45×10-8 mol/L.