TY - EJOUR
AU - Mohagheghpour, Elham
AU - Rajabi, Marjan
AU - Gholamipour, Reza
AU - Hosseinabadi, Sakineh
PY - 2024
DA - February
TI - Optical properties and surface growth mechanism of amorphous Carbon nanolayers
T2 - International Journal of Nano Dimension (Int. J. Nano Dimens.)
VL - 12
L1 - https://oiccpress.com/international-journal-of-nano-dimension/article/optical-properties-and-surface-growth-mechanism-of-amorphous-carbon-nanolayers-2/
DO - 10.22034/ijnd.2021.683690
N2 - In this article, the growth kinetic and optical property of amorphous carbon (a-C) nanolayers deposited by ion beam sputtering deposition technique on glass substrates are investigated. The atomic force microscopy is used to measure the variation of surface roughness versus deposition time. According to the calculations, the roughness of thin films increases during the growth process as a fractal scaling law. The Hurst exponent (α) has a value higher than 0.5, and the growth exponent (β) changes in the range of 0.02 to 0.22. These fractal exponents predict that the growth process of amorphous carbon nanolayers obeys the rules of the Wolf-Villain model belonging to the Edwards-Wilkinson universality class, in which the relaxation and surface diffusion happen during the growth process. The results indicate that the optical band gap decreases by reducing the surface roughness, Hurst exponent and the correlation length during thin film growth which is the first observation of this trend.
IS - 4
PB - OICC Press
KW - Thin Film, Wolf-Villain Model, Amorphous Carbon, Ion Beam Sputtering Deposition, Surface Growth Mechanism 
EN -