Umar Ahmad, Rahman M M, Hahn Yoon-Bong
School of Semiconductor and Chemical Engineering and BK21 Centre for Future Energy Materials and Devices, Nanomaterials Processing Research Centre, Chonbuk National University, Chonju 561-756, South Korea.
J Nanosci Nanotechnol. 2009 Aug;9(8):4686-91. doi: 10.1166/jnn.2009.1103.
Electrochemical sensor for the detection of hydrazine has been fabricated at the surface of gold electrode modified with ZnO nanorods. The ZnO nanorods were grown by non-catalytic simple thermal evaporation process by using metallic zinc powder in the presence of oxygen at low-temperature. The detailed structural studies revealed that the as-grown ZnO nanorods are well-crystalline with the wurtzite hexagonal phase and grown along the [0001] direction in preference. A good and reproducible sensitivity of 4.76 microA cm(-2) microM(-1) has been obtained from the fabricated hexagonal-shaped ZnO nanorods based electrochemical sensor. The response time of the fabricated sensor was less than 10 s with a linear range from 0.2 to 2.0 microM and correlation coefficient of R = 0.9914. The limit of detection (LOD), based on S/N ratio was estimated to be 2.2 microM.
用于检测肼的电化学传感器已在修饰有ZnO纳米棒的金电极表面制备而成。ZnO纳米棒是通过在低温下于氧气存在的条件下使用金属锌粉，采用非催化简单热蒸发工艺生长而成。详细的结构研究表明，生长出的ZnO纳米棒具有纤锌矿六方相，结晶良好，且优先沿[0001]方向生长。从所制备的基于六边形ZnO纳米棒的电化学传感器中获得了4.76微安厘米⁻²微摩尔⁻¹的良好且可重现的灵敏度。所制备传感器的响应时间小于10秒，线性范围为0.2至2.0微摩尔，相关系数R = 0.9914。基于信噪比估算的检测限（LOD）为2.2微摩尔。
