中文摘要：

以单壁碳纳米管作为电极材料,基于减压过滤和电聚合方法制备了一种薄膜型一氧化氮（NO）电化学传感器。扫描电镜、红外光谱和电化学交流阻抗表征表明,减压过滤可以制备出导电性好、电分析性能优良的薄膜电极,而罗丹明B能通过电聚合在其表面形成高比表面的纳米敏感结构。这种薄膜型电化学传感器对NO具有灵敏的电化学响应,其安培氧化电流与NO浓度在7.2×10-8~2.5×10-5mol/L范围内呈良好的线性关系,检出限（S/N=3）达3.6×10-8mol/L。将该传感器紧贴在麻醉豚鼠的肝脏表面,成功实现了肝组织细胞在L-精氨酸刺激下NO释放的实时监测。

英文摘要：

A simple strategy for fabricating a sensitive thin-film electrochemical sensor of nitric oxide（NO） based on single-walled carbon nanotube（SWNT） conducting films was proposed.The sensor was prepared by depositing a SWNT film on a mixed cellulose membrane through vacuum filtration and coating the SWNT film with a polyrhodamine B（PRhB） sensing film by electropolymerization.Scanning electron microscopic and electrochemical characterizations suggested that the electrochemical activation of SWNTs and the formation of a PRhB nanostructural film are responsible for the sensitive oxidation response of NO at this sensor.Under optimal working conditions,the amperometric response was linearly increased with NO concentration in the range of 7.2×10-8~2.5×10-5 mol/L,along with a low detection limit of 3.6×10-8 mol/L（S/N=3）.This thin-film sensor was successfully applied to the real-time monitoring of NO release from liver tissues of an anaesthetized guinea pig.