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首页> 外文期刊>Chemistry: A European journal >Enhanced Peroxidase-Like Properties of Graphene-Hemin-Composite Decorated with Au Nanoflowers as Electrochemical Aptamer Biosensor for the Detection of K562 Leukemia Cancer Cells
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Enhanced Peroxidase-Like Properties of Graphene-Hemin-Composite Decorated with Au Nanoflowers as Electrochemical Aptamer Biosensor for the Detection of K562 Leukemia Cancer Cells

机译：纳米金修饰的石墨烯-血红素复合物的过氧化物酶样特性作为电化学适体生物传感器，用于检测K562白血病癌细胞

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Graphene composites with hemin and gold nanoparticles show a better performance for hydrogen peroxide decomposition compared to that of the three components alone or duplex/hybrid complexes. Our previous studies showed that the morphology of the Au nanoparticles may greatly influence the catalytic activity of graphene-family peroxidase mimics. Recently, we found that Au nanoflowers could grow in situ and form on the surface of hemin/RGO (reduced graphene oxide). The prickly morphology of this Au nanoflower brought a higher catalytic ability with enhanced kinetic parameters than traditional Au nanoparticles that showed a smooth surface. Therefore, based on this discovery, a smart electrochemical aptamer biosensor for K562 leukemia cancer cells was further presented with good performance in selectivity and sensitivity attributed to the excellent mimetic peroxidase catalytic activity of this newly synthesized Au nanoflower decorated graphene-hemin composite (H-RGO-Au NFs).
机译：与单独的三种组分或双链/杂化复合物相比，具有血红素和金纳米颗粒的石墨烯复合材料表现出更好的过氧化氢分解性能。我们以前的研究表明，金纳米颗粒的形态可能极大地影响石墨烯家族过氧化物酶模拟物的催化活性。最近，我们发现Au纳米花可以原位生长并在hemin / RGO（还原的氧化石墨烯）表面上形成。与传统的表面光滑的金纳米颗粒相比，这种金纳米花的刺状形态具有更高的催化能力和增强的动力学参数。因此，基于这一发现，归因于这种新合成的金纳米花修饰的石墨烯-血红素复合物（H-RGO）的优异的模拟过氧化物酶催化活性，进一步提出了一种用于K562白血病细胞的智能电化学适体生物传感器，在选择性和灵敏度方面均具有良好的性能。 -Au NFs）。

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