Layer-by-layer assembly yields thin graphene films with near theoretical conductivity

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Oran Cassidy - , Trinity College Dublin (Author)
  • Kevin Synnatschke - , Center for Advancing Electronics Dresden (cfaed), Chair of Molecular Functional Materials (cfaed), Trinity College Dublin (Author)
  • Jose M. Munuera - , Trinity College Dublin (Author)
  • Cian Gabbett - , Trinity College Dublin (Author)
  • Tian Carey - , Trinity College Dublin (Author)
  • Luke Doolan - , Trinity College Dublin (Author)
  • Eoin Caffrey - , Trinity College Dublin (Author)
  • Jonathan N. Coleman - , Trinity College Dublin (Author)

Abstract

Thin films fabricated from solution-processed graphene nanosheets are of considerable technological interest for a wide variety of applications, such as transparent conductors, supercapacitors, and memristors. However, very thin printed films tend to have low conductivity compared to thicker ones. In this work, we demonstrate a simple layer-by-layer deposition method which yields thin films of highly-aligned, electrochemically-exfoliated graphene which have low roughness and nanometer-scale thickness control. By optimising the deposition parameters, we demonstrate films with high conductivity (1.3 × 105S/m) at very low thickness (11 nm). Finally, we connect our high conductivities to low inter-nanosheet junction resistances (RJ), which we estimate at RJ ~ 1kΩ.

Details

Original languageEnglish
Article number2
Journalnpj 2D materials and applications
Volume9
Issue number1
Publication statusPublished - Dec 2025
Peer-reviewedYes