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首页> 外文期刊>RSC Advances >DNA mediated electrocatalytic enhancement of alpha-Fe2O3-PEDOT-C-MoS2 hybrid nanostructures for riboflavin detection on screen printed electrode
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DNA mediated electrocatalytic enhancement of alpha-Fe2O3-PEDOT-C-MoS2 hybrid nanostructures for riboflavin detection on screen printed electrode

机译：DNA介导的α-Fe2O3-PEDOT-C-MoS2杂化纳米结构的电催化增强，可用于丝网印刷电极上的核黄素检测

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摘要

A facile synthesis of iron oxide nanorods and PEDOT(poly(3,4-ethylenedioxythiophene)) nanospheres on carbon supported MoS2 (C-MoS2) is reported for riboflavin (RF) sensing. Furthermore, a novel aqueous-based DNA wrapped on an alpha-Fe2O3-PEDOT-C-MoS2 scaffold shows high electrocatalytic activity compared to that of the alpha-Fe(2)O3(-)PEDOT-C-MoS2 composite in biosensing. alpha-Fe2O3-PEDOT-C-MoS2/GCE demonstrates the linear response of RF in the concentration range from 800 nM to 700 mu M, with a detection limit of 79 nM (S/N = 3 sigma/b), whereas the alpha-Fe2O3-PEDOT-C-MoS2-DNA/GCE composite shows a wider range from 300 nM to 1 mM with a comparatively low detection limit of 5 nM. Similarly, alpha-Fe2O3-PEDOT-C-MoS2-DNA/SPE exhibits a still wider range from 100 nM to 1 mM, with a detection limit of 12 nM. Interestingly, it is also observed that alpha-Fe2O3-PEDOT-C-MoS2-DNA/GCE reduces the oxidation potential of RF by 30 mV. Thus, the excellent behavior of the proposed biosensor can be attributed to the unique behavior of DNA, which provides a wider detection range and good electrocatalytic behavior towards RF. The fabricated sensor exhibited highly sensitive and selective detection of RF. Real sample analysis was also executed for human urine, milk powder and pharmaceutical drugs without any preliminary treatment.
机译：据报道，在碳负载的MoS2（C-MoS2）上可以轻松合成氧化铁纳米棒和PEDOT（聚（3,4-乙撑二氧噻吩））纳米球，以进行核黄素（RF）传感。此外，与生物传感中的α-Fe（2）O3（-）PEDOT-C-MoS2复合材料相比，包裹在α-Fe2O3-PEDOT-C-MoS2支架上的新型水基DNA显示出较高的电催化活性。 alpha-Fe2O3-PEDOT-C-MoS2 / GCE在800 nM至700μM的浓度范围内显示了RF的线性响应，检出限为79 nM（S / N = 3 sigma / b），而alpha -Fe2O3-PEDOT-C-MoS2-DNA / GCE复合材料的显示范围从300 nM到1 mM，检测限为5 nM，相对较低。同样，α-Fe2O3-PEDOT-C-MoS2-DNA/ SPE的显示范围从100 nM到1 mM仍然更宽，检测极限为12 nM。有趣的是，还观察到α-Fe2O3-PEDOT-C-MoS2-DNA/ GCE将RF的氧化电位降低了30 mV。因此，所提出的生物传感器的优良行为可以归因于DNA的独特行为，其提供了更宽的检测范围和对RF的良好的电催化行为。所制造的传感器表现出对RF的高度敏感和选择性检测。无需任何初步处理，还可以对人尿，奶粉和药物进行真实样品分析。

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