Structural evolution of laser-irradiated ultrananocrystalline diamond/amorphous carbon composite films prepared by coaxial arc plasma. (23rd September 2020)

• Record Type: Journal Article
• Authors: Zkria, Abdelrahman; Abubakr, Eslam; Egiza, Mohamed; Haque, Ariful; Narayan, Jagdish; Yoshitake, Tsuyoshi
• Is Part Of: Applied physics express. Volume 13:Number 10(2020)
• Publication Date: 2020-09-23
• Subjects: ultrananocrystalline diamond -- Nanosecond laser irradiation -- Arc plasma deposition -- X-ray photoemission (XPS) -- near-edge X-ray absorption fine-structure (NEXAFS); Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.35848/1882-0786/abb871
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: Ultrananocrystalline diamond/hydrogenated amorphous carbon films were synthesized by coaxial arc plasma deposition. The morphological and structural evolutions of the films driven by laser irradiation (ArF, 193 nm, 20 ns) are examined at different laser energies (0.4–1 J cm −2 ). Up on laser irradiation, the films revealed hydrogen effusions accompanied by the transformation of sp 3 into sp 2 -hybridization carbon. However, the film irradiated at 0.8 J cm −2 exhibited higher sp 3 fractions, which can be attributed to that: a specific value of laser energy density (0.8 J cm −2 ) can provide a suitable amount of heating that is enough to quench the film and increase the sp 3 contents.