Collaborative Research Centre for Sensors and Electronic Devices (CRCSED), Centre for Advanced Materials and Nano-Engineering (CAMNE), Najran University, P.O. Box 1988, Najran 11001, Saudi Arabia.
Talanta. 2012 Jan 30;89:155-61. doi: 10.1016/j.talanta.2011.12.006. Epub 2011 Dec 8.
This paper reports a very simple, reliable and facile methodology to fabricate ultra-high sensitive liquid ammonia chemical sensor using well-crystalline hexagonal-shaped ZnO nanopencils as an efficient electron mediator. A low-temperature facile hydrothermal technique was used to synthesize ZnO nanopencils. The synthesized nanopencils were characterized in detail in terms of their morphological, structural and optical properties which confirmed that the synthesized nanomaterial is well-crystalline, possessing wurtzite hexagonal phase and possess very good optical properties. A very high sensitivity of ≈ 26.58μAcm(-2)mM(-1) and detection limit of ≈ 5nM with a correlation coefficient (R) of 0.9965 and a response time of less than 10s were observed for the fabricated liquid ammonia by I-V technique. To the best of our knowledge, by comparing the literature, it is confirmed that the fabricated sensor based on ZnO nanopencils exhibits highest sensitivity and lowest detection limit for liquid ammonia. This research opens a way that simply synthesized nanomaterials could be used as efficient electron mediators for the fabrication of efficient liquid ammonia chemical sensors.
本文报道了一种非常简单、可靠和简便的方法，使用结晶良好的六方形状 ZnO 纳米笔作为有效的电子介质来制造超高灵敏度的液体氨化学传感器。采用低温简便水热技术合成 ZnO 纳米笔。从形态、结构和光学性质等方面对合成的纳米笔进行了详细的表征，证实了所合成的纳米材料具有结晶性，具有纤锌矿六方相，具有很好的光学性质。通过 I-V 技术观察到所制备的液体氨的灵敏度约为 26.58μAcm(-2)mM(-1)，检测限约为 5nM，相关系数 (R) 为 0.9965，响应时间小于 10s。据我们所知，通过与文献进行比较，可以确认基于 ZnO 纳米笔的制备传感器对液体氨具有最高的灵敏度和最低的检测限。这项研究为简单合成的纳米材料作为高效液体氨化学传感器的有效电子介质的制备开辟了一条途径。
