Zhao Min, Zhao Jianwei, Qin Lirong, Jiang Zhengyan, Jia Hongliang
School of Physical Science and Technology, Southwest University.
Anal Sci. 2018;34(11):1225-1230. doi: 10.2116/analsci.18P056.
A hierarchical CuO array film was fabricated by electrochemical deposition with the aid of a colloidal monolayer as a template, followed by oxidation at high temperature. The prepared CuO film with a granular structure was arranged with ordered, hexagonal close-packed, and bowl-like pores. Combined with a gold layer sputtered on a glass substrate, this CuO array film was used as an electrochemical electrode in the amperometric detection of l-ascorbic acid. The array film exhibited a high sensitivity of 3484 μA mM cm, a wide linear range from 1 μM to 7 mM, and a detection limit of 0.2 μM. Excellent stability was also achieved. The results demonstrate that the hierarchical CuO bowl-like array film is a promising new platform for the construction of non-enzymatic ascorbic acid sensors.
以胶体单层为模板，通过电化学沉积法制备了分级CuO阵列薄膜，随后进行高温氧化。制备的具有颗粒结构的CuO薄膜具有有序的、六方密堆积的碗状孔。将这种CuO阵列薄膜与溅射在玻璃基板上的金层相结合，用作安培检测L-抗坏血酸的电化学电极。该阵列薄膜表现出3484 μA mM cm的高灵敏度、1 μM至7 mM的宽线性范围以及0.2 μM的检测限。还实现了优异的稳定性。结果表明，分级CuO碗状阵列薄膜是构建非酶抗坏血酸传感器的一个有前途的新平台。
