• 文献标题:   Driving forces for the self-assembly of graphene oxide on organic monolayers
  • 文献类型:   Article
  • 作  者:   KIRSCHNER J, WANG ZX, EIGLER S, STEINRUCK HP, JAGER CM, CLARK T, HIRSCH A, HALIK M
  • 作者关键词:  
  • 出版物名称:   NANOSCALE
  • ISSN:   2040-3364 EI 2040-3372
  • 通讯作者地址:   Univ Erlangen Nurnberg
  • 被引频次:   7
  • DOI:   10.1039/c4nr02527j
  • 出版年:   2014

▎ 摘  要

Graphene oxide (GO) flakes were self-assembled from solution on surfaces of self-assembled monolayers (SAMs), varying in the chemical structure of their head groups. The coverage density of GO relates to strength of attractive interaction, which is largest for Coulomb interaction provided by positively charged SAM head groups and negatively charged GO. A rough surface enhances the coverage density but with the same trend in driving force dependency. The self-assembly approach was used to fabricate field-effect transistors with reduced GO (rGO) as active layer. The SAMs as attractive layer for self-assembly remain almost unaffected by the reduction from GO to rGO and serve as ultra-thin gate dielectrics in devices, which operate at low voltages of maximum 3 V and exhibit a shift of the Dirac voltage related to the dipole moment of the SAMs.