Low-temperature Raman studies of graphene oxide: Analysis of structural properties

Glamazda, A.Yu. та Linnik, A.S. та Литвин, Оксана Степанівна та Karachevtsev, V.A. (2024) Low-temperature Raman studies of graphene oxide: Analysis of structural properties AIP Advances, 14 (2). 025033-1-025033-7. ISSN 21583226

Текст O_Lytvyn_et_all_AIP Adv_2024_FITM.pdf Download (7MB)

Анотація

This work is devoted to the low-temperature Raman studies of a bright representative of 2D materials—graphene oxide (GO) film in the range of 5–325 K. The performed analysis of the temperature evolution of the peak positions as well as linewidths of two Raman modes D (∼1300 cm−1) and G (∼1600 cm−1) was described in terms of the anharmonic model. The temperature behavior of the G mode demonstrated a slight deviation from the anharmonic model below ∼50 K in contrast to the D mode, which could be explained by involving an additional phonon decay channel. The analysis of the linewidth of the Raman modes showed that the distribution of defects in GO is inhomogeneous and surface functionalization effectively separates neighboring layers. The average value of the distance between defects and the defect density was estimated. The obtained results can be useful for understanding phonon dynamics for the development of nanodevices based on 2D materials where confinement of propagation of phonon excitations plays a key role.

Тип елементу :	Стаття
Ключові слова:	carbon low-dimensional materials; graphene oxide; low-temperature Raman study; Atomic-force microscopy
Типологія:	Статті у базах даних > Scopus Статті у базах даних > Web of Science
Підрозділи:	Факультет інформаційних технологій та математики > Кафедра математики і фізики
Користувач, що депонує:	Оксана Степанівна Литвин
Дата внесення:	02 Квіт 2024 11:04
Останні зміни:	02 Квіт 2024 11:04
URI:	https://elibrary.kubg.edu.ua/id/eprint/48517

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