Speaker
Description
H. V. Vasilyan*, H. I. Badalyan, T. V. Ohanyan, S. J. Sedrakyan, E. Aleksanyan, N. B. Margaryan
A.I. Alikhanyan National Science Laboratory (Yerevan Physics Institute), 2 Alikhanyan Brothers, Yerevan, Republic of Armenia, 0036
Graphene was synthesized via an efficient, low-temperature liquid-phase exfoliation technique and then characterized using a suite of analytical methods. Raman spectroscopy provided insight into its structural features and the effects of subsequent thermal treatment on defect signatures and residual impurities. Atomic force microscopy revealed a fractal surface topology with an average roughness of approximately 0.33 nm. By computing fractal dimensions from the AFM data, we derived a theoretical surface potential of 370 meV, which aligns within 8 % of the 400 meV measured experimentally by the Kelvin probe method. These results underscore the power of fractal analysis for accurately probing graphene’s surface morphology and electronic behavior.
The research was supported by The Higher Education and Science Committee of MESCS RA (Research project No2424LCG-1C015)
Reference.
1 N. Margaryan, N. Kokanyan, E. Kokanyan, Low-temperature synthesis and characteristics of fractal graphene layers, J. Saudi Chem. Soc. 23 (2019) 13–20.
2 N. Margaryan et al, “15.5 MeV proton irradiation treatment of liquid phase exfoliated graphene,” Diamond and Related Materials V 146, (2024), 111224.
3 N. Margaryan, E. Aleksanyan, V. Harutyunyan, A. Hovhannisyan, N. Margaryan, Thermal reduction and fractal analysis of liquid phase exfoliated graphene, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 1075, 2025, 170407.
