Cost-Efficient Printing of Graphene Nanostructures on Smart Contact Lenses

Haodong Tang, Bader Alqattan, Tim Jackson, Zoe Pikramenou, Xiao Wei Sun, Kai Wang, Haider Butt

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Smart contact lenses have been put forward for years, but there is still no commercial product in the market; the high cost due to expensive fabrication techniques could be one of the reasons. In this paper, first, a cost-efficient and reliable route to fabricate graphene grating on contact lens was designed and demonstrated based on the direct laser interference patterning graphene film on commercial contact lenses using an Nd:YAG laser. The thickness of the film and the interference angle have been taken into consideration. Optical characterization and simulation have been applied to evaluate the quality of our final achieved grating patterns with a grating size from 0.92 to 3.04 μm. Two-dimensional (2D) patterns could also be obtained through double-time laser interference. Contact angles for samples with different interference angles were presented considering the service environment of smart contact lenses. Of course, the conductivity of the samples was evaluated using a four-probe method. The most conductive sample had the sheet resistance lower than 30 ω/sq. This research study highlighted the possibility of patterning graphene with the laser ablation method and provided a candidate solution for the fabrication of smart contact lenses under controlled cost.

Original languageBritish English
Pages (from-to)10820-10828
Number of pages9
JournalACS Applied Materials and Interfaces
Volume12
Issue number9
DOIs
StatePublished - 4 Mar 2020

Keywords

  • ablation
  • diffraction grating, nanopatterning
  • direct laser interference patterning
  • graphene
  • smart contact lens

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