Laser Raman micro-spectroscopy as an effective non-destructive method of detection and identification of various sp2 carbon modifications in industry and in nature

Abstract

** Dedicated to the 90 th anniversary of the Raman effect (modified-frequency scattering of monochromatic light) discovered simultaneously and independently by Raman (India) and academicians Mandel'stam and Landsberg (USSR).

Observation of Graphite-Like and Diamond-Like Nanostructures in the Raman Spectra of Natural and Synthesized MoS2 Crystals with Small Carbon Additives

“…It is known that in the Raman spectra of fragments of the "Chelyabinsk" meteorite (2013) with a carbon content of 0.11 % a narrow diamond line with a frequency of 1332 ± 1 cm -1 and a FWHM δν = 3.5 cm -1 was clearly observed [30], that indicates on the prospects of using Raman scattering spectroscopy. Radiation of an Ar+ laser with a wavelength of λL = 488 nm (near the electron absorption edge) and a He-Ne laser λL = 632.8 nm (resonant with the exciton states of 2H-MoS2) were used.…”

Observation of Diamond- and Graphite-Like Nanostructures in the Raman Spectra of MoS2–C Nanoheterostructures

“…По данным прецизионных рентгеновских исследований (полнопрофильный метод, с использованием программ компьютерных структурных расчётов WinCSD [12]) микронные порошки MoS 2гомогенные, кристаллографические данные и параметры элементарной ячейки соответствуют известным литературным данным [13]: пр. группа -P6 3 /mmc; a0,315956 (2) ) чётко наблюдалась узкая линия алмаза с частотой 13321 см 1 с полушириной  3,5 см 1 при содержании углерода 0,11% [16], что указывает на перспективность использования спектроскопии КР.…”