| CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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Polarization Raman spectra of graphene nanoribbons |
| Wangwei Xu(许望伟)1,†, Shijie Sun(孙诗杰)1,†, Muzi Yang(杨慕紫)2, Zhenliang Hao(郝振亮)1, Lei Gao(高蕾)3, Jianchen Lu(卢建臣)1, Jiasen Zhu(朱嘉森)2, Jian Chen(陈建)2,‡, and Jinming Cai(蔡金明)1,§ |
1 Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650000, China;
2 School of Materials Science and Engineering, Instrumental Analysis and Research Center, Sun Yat-sen University, Guangzhou 510275, China;
3 Faculty of Science, Kunming University of Science and Technology, Kunming 650000, China |
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Abstract The on-surface synthesis method allows the fabrication of atomically precise narrow graphene nanoribbons (GNRs), which bears great potential in electronic applications. Here, we synthesize armchair graphene nanoribbons (AGNRs) and chevron-type graphene nanoribbons (CGNRs) array on a vicinal Au(11 11 12) surface using 10,10'-dibromo-9,9'-bianthracene (DBBA) and 6,12-dibromochrysene (DBCh) as precursors, respectively. This process creates spatially well-aligned GNRs, as characterized by scanning tunneling microscopy. AGNRs show strong Raman linear polarizability for application in optical modulation devices. Different from the distinct polarization of AGNRs, only weak polarization exists in CGNRs polarized Raman spectrum, which suggests that the presence of the zigzag boundary in the nanoribbon attenuates the polarization rate as an important factor affecting the polarization. We analyze the Raman activation mode of CGNRs using the peak polarization to expand the application of the polarization Raman spectroscopy in nanoarray analysis.
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Received: 29 April 2022
Revised: 23 June 2022
Accepted manuscript online: 13 July 2022
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PACS:
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68.37.Ef
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(Scanning tunneling microscopy (including chemistry induced with STM))
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74.25.nd
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(Raman and optical spectroscopy)
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78.67.Wj
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(Optical properties of graphene)
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81.05.ue
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(Graphene)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61901200), the Yunnan Fundamental Research Projects (Grant Nos. 2019FD041, 202101AU070043, 202101AV070008, and 202101AW070010), the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. NXDB30010000), and the Dongguan Innovation Research Team Program. |
Corresponding Authors:
Jian Chen, Jinming Cai
E-mail: puscj@mail.sysu.edu.cn;j.cai@kust.edu.cn
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Cite this article:
Wangwei Xu(许望伟), Shijie Sun(孙诗杰), Muzi Yang(杨慕紫), Zhenliang Hao(郝振亮), Lei Gao(高蕾), Jianchen Lu(卢建臣), Jiasen Zhu(朱嘉森), Jian Chen(陈建), and Jinming Cai(蔡金明) Polarization Raman spectra of graphene nanoribbons 2023 Chin. Phys. B 32 046803
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