Ultrananocrystalline diamond-like carbon (UN-DLC) assembled on epitaxial ZnO film by PLD technique and SIMS Raman Rutherford spectroscopic fingerprint investigation

Elayaperumal, M and Gnanasekaran, K and Moodley, MK and Mwakikunga, BW and Gaur, R and Umapathy, S and Ladchumananandasivam, R and Maaza, M (2021) Ultrananocrystalline diamond-like carbon (UN-DLC) assembled on epitaxial ZnO film by PLD technique and SIMS Raman Rutherford spectroscopic fingerprint investigation. In: Journal of Raman Spectroscopy .

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Abstract

Nanocomposite materials coating opens up tremendous opportunities in the development of commercial products for household to industrial applications. In this present article, we are reporting the formation of 10-nm carbon (C) layer underneath the 6-nm ZnO epitaxial thin-film grown on simple quarts or Si(100) substrate by pulsed laser deposition. As-obtained nanocrystalline carbon layers between the Si(100) and ZnO and above ZnO epitaxial film were studied by micro-Raman, secondary ion mass (SIMS), and resonant Rutherford backscattering (RRBS) spectroscopic methods. The carbon diffusivity analysis revealed that the diffusion at nanoscale is governed predominantly by a nonlinear Fick's law rather than the Soret-Ludwig law. Quantum diffusion dominates the classical diffusion and carbon diffusivity into ZnO layer and was found to be ~7.8 � 10�12 cm2 s�1. This diffusion explains the doping profiles of ZnO layer up to its surface where carbon packing suggests presence of ultrananocrystalline-diamond-like-carbon (UN-DLC) thin films revealed by Raman spectroscopy. © 2021 John Wiley & Sons, Ltd.

Item Type:	Journal Article
Publication:	Journal of Raman Spectroscopy
Publisher:	John Wiley and Sons Ltd
Additional Information:	The copyright for this article belongs to John Wiley and Sons Ltd
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	21 Nov 2021 16:27
Last Modified:	21 Nov 2021 16:27
URI:	http://eprints.iisc.ac.in/id/eprint/69928

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