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arXiv 2201.01242cond-mat.mes-hall
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用密度泛函理论计算评价膦用于DNA电子测序的可行性

Evaluation of the Feasibility of Phosphorene for Electronic DNA Sequencing Using Density Functional Theory Calculations

Matthew B. Henry, Mukesh Tumbapo, Kolby Wilson, Benjamin O. Tayo

摘要:

使用诸如石墨烯的二维(2D)材料的电子DNA测序最近已经作为下一代DNA测序技术出现。由于其商业可用性和显著的物理和导电性能,石墨烯已被多个理论和实验小组广泛研究用于DNA测序。尽管取得了这一进展,使用石墨烯进行测序仍然是一个重大挑战。这是由于石墨烯的疏水性,导致DNA碱基通过强π-π相互作用粘附在其表面,降低了易位速度并增加了错误率。为了规避这一挑战,科学界将注意力转向石墨烯以外的其他2D材料。一种这样的材料是磷烯。在这篇文章中,我们进行了第一性原理计算研究,使用密度泛函理论(DFT)来评估磷烯区分单个DNA碱基的能力,使用两种检测原理,即纳米孔和纳米取向模式。我们观察到,与石墨烯相比,磷烯中DNA碱基的结合能较低。与石墨烯相比,由于与DNA碱基的相互作用而引起的能隙调制在磷烯中非常显著。我们的研究表明磷烯优于石墨烯,因此是电子DNA测序的一种有前途的替代品。

英文摘要:

Electronic DNA sequencing using two-dimensional (2D) materials such as graphene has recently emerged as the next-generation of DNA sequencing technology. Owing to its commercial availability and remarkable physical and conductive properties, graphene has been widely investigated for DNA sequencing by several theoretical and experimental groups. Despite this progress, sequencing using graphene remains a major challenge. This is due to the hydrophobic nature of graphene, which causes DNA bases to stick to its surface via strong π-π interactions, reducing translocation speed and increasing error rates. To circumvent this challenge, the scientific community has turned its attention to other 2D materials beyond graphene. One such material is phosphorene. In this article, we performed first-principle computational studies using density functional theory (DFT) to evaluate the ability of phosphorene to distinguish individual DNA bases using two detection principles, namely, nanopore and nanoribbon modalities. We observe that binding energies of DNA bases are lower in phosphorene compared to graphene. The energy gap modulations due to interaction with DNA bases are very significant in phosphorene compared to graphene. Our studies show that phosphorene is superior to graphene, and hence a promising alternative for electronic DNA sequencing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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