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Large Rectification Effect of Single Graphene Nanopore Supported by PET Membrane

  • [设施]:兰州重离子研究装置
  • [期刊/会议名称]:ACS Applied Materials & Interfaces
  • [摘要]:Graphene is an ideal candidate for the development of solid state nanopores due to its thickness at the atomic scale and its high chemical and mechanical stabilities. A facile method was adopted to prepare single graphene nanopore supported by PET membrane (G/PET nanopore) within the three steps assisted by the swift heavy ion irradiation and asymmetric etching technology. The inversion of the ion rectification effect was confirmed in G/PET nanopore while comparing with bare PET nanopore in KCl electrolyte solution. By modifying the wall charge state of PET conical nanopore with hydrochloric acid from negative to positive, the ion rectification effect of G/PET nanopore was found to be greatly enhanced and the large rectification ratio up to 190 was obtained during this work. Moreover, the high ionic flux and high ion separation efficiency was also observed in the G/PET nanopore system. By comparing the “on” and “off” state conductance of G/PET nanopore while immersed in the solution with pH value lower than the isoelectric point of the etched PET (IEP, pH = 3.8), the voltage dependence of the off conductance was established and it was confirmed that the large rectification effect was strongly dependent on the particularly low off conductance at higher applied voltage.
  • [发表日期]:2017
  • [第一作者]:姚会军
  • [第一作者单位]:中科院近代物理研究所
  • [通讯作者]:姚会军
  • [通讯作者单位]:中科院近代物理研究所
  • [论文类型]:期刊
  • [期刊分类]:SCI1区
  • [学科分类]:材料科学
  • [影响因子]:6.589
  • [关键词]:graphene nanopore, PET membrane, ion rectification effect, inversion, ion irradiation
  • [卷号]:9
  • [期号]:12
  • [起止页码]:11000-11008
  • [简介]: