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Adsorption properties of dopamine derivatives using carbon nanotubes: A first-principles study

机译:碳纳米管对多巴胺衍生物的吸附特性:第一性原理研究

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Detecting dopamine is of great biological importance because the molecule plays many roles in a human body. For instance, lack of dopamine release is the cause of Parkinson's disease. Although many researchers have carried out experiments on dopamine detection using carbon nanotubes (CNTs), there are only a few theoretical studies on this topic. We study the adsorption properties of dopamine and its derivatives, L-DOPA and dopamine o-quinone, adsorbed on a semiconducting (10, 0) CNT, using density functional theory calculations. Our computational simulations reveal that localized states originating from dopamine o-quinone appear in the bandgap of the (10, 0) CNT, but those originating from dopamine and L-DOPA do not appear in the gap. Therefore, dopamine o-quinone is expected to be detectable using an external electric field but dopamine and L-DOPA should be difficult to detect.
机译:检测多巴胺具有重要的生物学重要性,因为该分子在人体中起着许多作用。例如,缺乏多巴胺释放是帕金森氏病的原因。尽管许多研究人员已经进行了使用碳纳米管(CNT)进行多巴胺检测的实验,但有关该主题的理论研究很少。我们使用密度泛函理论计算研究了多巴胺及其衍生物L-DOPA和多巴胺邻醌在半导电(10,0)CNT上的吸附性能。我们的计算仿真表明,源自多巴胺邻醌的局域态出现在(10,0)CNT的带隙中,但是源自多巴胺和L-DOPA的局域态没有出现在间隙中。因此,期望可以使用外部电场检测多巴胺邻醌,但是应该难以检测多巴胺和L-DOPA。

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