Surface patterning of multilayer graphene by ultraviolet laser irradiation in biomolecule sensing devices

Tien-Li Chang, Zhao Chi Chen

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The study presents a direct process for surface patterning of multilayer graphene on the glass substrate as a biosensing device. In contrast to lithography with etching, the proposed process provides simultaneous surface patterning of multilayer graphene through nanosecond laser irradiation. In this study, the multilayer graphene was prepared by a screen printing process. Additionally, the wavelength of the laser beam was 355 nm. To perform the effective laser process with the small heat affected zone, the surface patterns on the sensing devices could be directly fabricated using the laser with optimal control of the pulse overlap at a fluence threshold of 0.63 J/cm 2 . The unique patterning of the laser-ablated surface exhibits their electrical and hydrophilic characteristics. The hydrophilic surface of graphene-based sensing devices was achieved in the process with the pulse overlap of 90%. Furthermore, the sensing devices for controlling the electrical response of glucose by using glucose oxidase can be used in sensors in commercial medical applications.

Original languageEnglish
Pages (from-to)543-549
Number of pages7
JournalApplied Surface Science
Volume359
DOIs
Publication statusPublished - 2015 Dec 30

Keywords

  • Laser irradiation
  • Multilayer graphene
  • Sensing devices
  • Surface patterning

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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