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Non-enzymatic Fructose Sensor Based on Co3O4 Thin Film

机译：基于CO3O4薄膜的非酶促果糖传感器

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摘要

In this study, we report on the selective of fructose on Co3O4 thin film electrode surface. A facile chemical solution deposition technique was used to fabricate Co3O4 thin film on fluorine doped tin oxide, FTO, glass. Electrode characterization was done using XRD, HRTEM, SEM, AFM, and EIS. The constructed sensor exhibited two distinctive linear ranges (0.021-1.74mM; 1.74-approximate to 15mM) covering a wide linear range of up to approximate to 15mM at an applied potential of +0.6V vs Ag/AgCl in 0.1M NaOH solution. The sensor demonstrated high, reproducible and repeatable (R.S.D of <5%) sensitivity of 495 (lower concentration range) & 53 (higher concentration range) Acm(-2)mM(-1). The sensor produced a low detection limit of approximate to 1.7M (S/N=3). The electrode was characterised by a fast response time of <6s and long term stability. The repeatability and stability of the electrode resulted from the chemical stability of Co3O4 thin film. The sensor was highly selective towards fructose compared to the presence of other key interferences i.e. AA, AC, UA. The ease of the electrode fabrication coupled with good electrochemical activity makes Co3O4 thin film, a promising candidate for non-enzymatic fructose detection.
机译：在本研究中，我们报告了CO3O4薄膜电极表面果糖的选择性。用于在氟掺杂氧化锡，FTO，玻璃上制造Co3O4薄膜的CO 3 O 4薄膜。使用XRD，HRTEM，SEM，AFM和EIS进行电极表征。构造的传感器表现出两个独特的线性范围（0.021-1.74mm; 1.74-近似为15mm），覆盖0.1M NaOH溶液中+ 0.6V Vs Ag / AgCl的施加电位的宽线性范围达到15mm。传感器显示出高，可重复和可重复的（R.S.D的<5％）495（较低浓度范围）和53（较高浓度范围）ACM（-2）mm（-1）的敏感性。传感器产生近似的低检测限度为1.7M（S / N = 3）。电极的特征在于<6s和长期稳定性的快速响应时间。电极的可重复性和稳定性是由CO3O4薄膜的化学稳定性产生的。与其他关键干扰的存在相比，传感器对果糖具有高度选择性，而AA，AC，UA。电极制造耦合的电极制造具有良好的电化学活性使得CO3O4薄膜，是非酶促果糖检测的有希望的候选者。

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