• 文献标题:   Improving the Sensory Properties of Layered Phospholipid-Graphene Films Due to the Curvature of Graphene Layers
  • 文献类型:   Article
  • 作  者:   SLEPCHENKOV MM, GLUKHOVA OE
  • 作者关键词:   sensory propertie, phospholipidgraphene film, curvature, charge transfer, electrical conductivity, densityfunctional tightbinding method, electron charge density, currentvoltage characteristic
  • 出版物名称:   POLYMERS
  • ISSN:  
  • 通讯作者地址:   Saratov NG Chernyshevskii State Univ
  • 被引频次:   0
  • DOI:   10.3390/polym12081710
  • 出版年:   2020

▎ 摘  要

This article is devoted to the in silico study of the sensory properties of mono- and bilayer phospholipid-graphene films with planar and curved graphene sheets. The DPPC (dipalmitoylphosphatidylcholine) molecules are considered as phospholipid structures. These molecules are part of lipid bilayers, liposomes and cell membranes. To find a way to improve the sensory properties of phospholipid-graphene films, we studied the effect of the curvature of the graphene sheet on the charge transfer and electrical conductivity of the films. The distribution of the electron charge density over the film atoms was calculated using the self-consistent-charge density-functional tight-binding method (SCC-DFTB). The calculation of the current through phospholipid-graphene films was carried out within the framework of the Landauer-Buttiker formalism using the Keldysh nonequilibrium Green function technique. As a result of the calculations, the optimal configuration of the arrangement of DPPC molecules between two graphene layers was established. This configuration provides the maximum possible increase in current to 1 mu A at low voltages of similar to 0.2 V and is achieved for curved graphene with a radius of curvature of similar to 2.7 nm at individual points of graphene atomic network.