Laser-induced structure transition of diamond-like carbon coated on cemented carbide and formation of reduced graphene oxide

Abdelrahman Zkria, Ariful Haque, Mohamed Egiza, Eslam Abubakr, Koki Murasawa, Tsuyoshi Yoshitake, Jagdish Narayan

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We report on the structural evolution of diamond-like carbon (DLC) films by the nanosecond pulsed laser annealing process. DLC film is coated on cemented carbide (WC-Co) by cathodic arc ion plating, which is then annealed by ArF laser (193 nm, 20 ns) at different laser fluences (0.9-1.7 J/cm2). Upon laser annealing, Raman spectra divulge higher sp3 fractions accompanied by a blue shift in the G-peak position, which indicates the changes of sp2 sites from rings to chains. At higher fluence (>1.2 J/cm2), the film converts into reduced graphene oxide confirmed by its Raman-active vibrational modes: D, G, and 2D.

Original languageEnglish
Pages (from-to)910-915
Number of pages6
JournalMRS Communications
Volume9
Issue number3
DOIs
Publication statusPublished - Sep 1 2019

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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