Enhancement Effect of Low-Frequency Raman Modes in Graphene Nanoscrolls

Shiqi Yang; Xu Han; Yang Qin; Jiahao Yan; Zihao Guo; Yehua Yang; Tongtong Xue; Jiakai Wang; Jinghan Zhao; Xinyu Shi; Ming Lei; Jun Zhang; Qinghua Zhang; Miao Ling Lin; Liwei Liu; Ping Heng Tan; Xia Liu; Yunyun Dai; Yeliang Wang; Yuan Huang

doi:10.1021/acsami.4c22050

Enhancement Effect of Low-Frequency Raman Modes in Graphene Nanoscrolls

Shiqi Yang, Xu Han, Yang Qin, Jiahao Yan, Zihao Guo, Yehua Yang, Tongtong Xue, Jiakai Wang, Jinghan Zhao, Xinyu Shi, Ming Lei, Jun Zhang, Qinghua Zhang, Miao Ling Lin, Liwei Liu, Ping Heng Tan, Xia Liu^*, Yunyun Dai^*, Yeliang Wang^*, Yuan Huang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Graphene nanoscrolls (GNSs) are unique structures with interlayer coupling modes distinct from those in graphene and carbon nanotubes, exhibiting potential physical properties yet to be explored. Here we investigated the low-frequency Raman modes in GNSs formed from 1 to 3 layer graphene (1-3LG). The results of the Raman spectroscopy show that both shear (C) and layer breathing (LB) modes have appeared in monolayer graphene nanoscrolls (1L-GNSs), although these modes never exist in the flat 1LG. Remarkably, both 2L- and 3L-GNSs exhibited multiple low-frequency modes linked to other layer numbers, revealing the emergence of additional interlayer coupling. Annealing significantly enhanced low-frequency Raman signals and introduced additional modes, with the C₂₁ mode intensity increasing nearly 3-fold and LBM₆₁ intensity rising 16-fold. Transmission electron microscopy (TEM) imaging showed reduced ∼0.3 Å interlayer spacing after annealing, indicating stronger interlayer coupling. This work provides important scientific evidence for understanding the interlayer coupling in GNSs.

Original language	English
Pages (from-to)	14415-14424
Number of pages	10
Journal	ACS Applied Materials and Interfaces
Volume	17
Issue number	9
DOIs	https://doi.org/10.1021/acsami.4c22050
Publication status	Published - 5 Mar 2025

Keywords

annealing
graphene nanoscrolls
interlayer coupling
low-frequency Raman modes
Raman spectroscopy

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10.1021/acsami.4c22050

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Yang, S., Han, X., Qin, Y., Yan, J., Guo, Z., Yang, Y., Xue, T., Wang, J., Zhao, J., Shi, X., Lei, M., Zhang, J., Zhang, Q., Lin, M. L., Liu, L., Tan, P. H., Liu, X., Dai, Y., Wang, Y., & Huang, Y. (2025). Enhancement Effect of Low-Frequency Raman Modes in Graphene Nanoscrolls. ACS Applied Materials and Interfaces, 17(9), 14415-14424. https://doi.org/10.1021/acsami.4c22050

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title = "Enhancement Effect of Low-Frequency Raman Modes in Graphene Nanoscrolls",

abstract = "Graphene nanoscrolls (GNSs) are unique structures with interlayer coupling modes distinct from those in graphene and carbon nanotubes, exhibiting potential physical properties yet to be explored. Here we investigated the low-frequency Raman modes in GNSs formed from 1 to 3 layer graphene (1-3LG). The results of the Raman spectroscopy show that both shear (C) and layer breathing (LB) modes have appeared in monolayer graphene nanoscrolls (1L-GNSs), although these modes never exist in the flat 1LG. Remarkably, both 2L- and 3L-GNSs exhibited multiple low-frequency modes linked to other layer numbers, revealing the emergence of additional interlayer coupling. Annealing significantly enhanced low-frequency Raman signals and introduced additional modes, with the C21 mode intensity increasing nearly 3-fold and LBM61 intensity rising 16-fold. Transmission electron microscopy (TEM) imaging showed reduced ∼0.3 {\AA} interlayer spacing after annealing, indicating stronger interlayer coupling. This work provides important scientific evidence for understanding the interlayer coupling in GNSs.",

keywords = "annealing, graphene nanoscrolls, interlayer coupling, low-frequency Raman modes, Raman spectroscopy",

author = "Shiqi Yang and Xu Han and Yang Qin and Jiahao Yan and Zihao Guo and Yehua Yang and Tongtong Xue and Jiakai Wang and Jinghan Zhao and Xinyu Shi and Ming Lei and Jun Zhang and Qinghua Zhang and Lin, {Miao Ling} and Liwei Liu and Tan, {Ping Heng} and Xia Liu and Yunyun Dai and Yeliang Wang and Yuan Huang",

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doi = "10.1021/acsami.4c22050",

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T1 - Enhancement Effect of Low-Frequency Raman Modes in Graphene Nanoscrolls

AU - Yang, Shiqi

AU - Han, Xu

AU - Qin, Yang

AU - Yan, Jiahao

AU - Guo, Zihao

AU - Yang, Yehua

AU - Xue, Tongtong

AU - Wang, Jiakai

AU - Zhao, Jinghan

AU - Shi, Xinyu

AU - Lei, Ming

AU - Zhang, Jun

AU - Zhang, Qinghua

AU - Lin, Miao Ling

AU - Liu, Liwei

AU - Tan, Ping Heng

AU - Liu, Xia

AU - Dai, Yunyun

AU - Wang, Yeliang

AU - Huang, Yuan

PY - 2025/3/5

Y1 - 2025/3/5

N2 - Graphene nanoscrolls (GNSs) are unique structures with interlayer coupling modes distinct from those in graphene and carbon nanotubes, exhibiting potential physical properties yet to be explored. Here we investigated the low-frequency Raman modes in GNSs formed from 1 to 3 layer graphene (1-3LG). The results of the Raman spectroscopy show that both shear (C) and layer breathing (LB) modes have appeared in monolayer graphene nanoscrolls (1L-GNSs), although these modes never exist in the flat 1LG. Remarkably, both 2L- and 3L-GNSs exhibited multiple low-frequency modes linked to other layer numbers, revealing the emergence of additional interlayer coupling. Annealing significantly enhanced low-frequency Raman signals and introduced additional modes, with the C21 mode intensity increasing nearly 3-fold and LBM61 intensity rising 16-fold. Transmission electron microscopy (TEM) imaging showed reduced ∼0.3 Å interlayer spacing after annealing, indicating stronger interlayer coupling. This work provides important scientific evidence for understanding the interlayer coupling in GNSs.

AB - Graphene nanoscrolls (GNSs) are unique structures with interlayer coupling modes distinct from those in graphene and carbon nanotubes, exhibiting potential physical properties yet to be explored. Here we investigated the low-frequency Raman modes in GNSs formed from 1 to 3 layer graphene (1-3LG). The results of the Raman spectroscopy show that both shear (C) and layer breathing (LB) modes have appeared in monolayer graphene nanoscrolls (1L-GNSs), although these modes never exist in the flat 1LG. Remarkably, both 2L- and 3L-GNSs exhibited multiple low-frequency modes linked to other layer numbers, revealing the emergence of additional interlayer coupling. Annealing significantly enhanced low-frequency Raman signals and introduced additional modes, with the C21 mode intensity increasing nearly 3-fold and LBM61 intensity rising 16-fold. Transmission electron microscopy (TEM) imaging showed reduced ∼0.3 Å interlayer spacing after annealing, indicating stronger interlayer coupling. This work provides important scientific evidence for understanding the interlayer coupling in GNSs.

KW - annealing

KW - graphene nanoscrolls

KW - interlayer coupling

KW - low-frequency Raman modes

KW - Raman spectroscopy

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Enhancement Effect of Low-Frequency Raman Modes in Graphene Nanoscrolls

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