The structure of chemical vapor deposited graphene substrates for graphene-enhanced Raman spectroscopy

被引：13

作者：

Faggio, G. ^{[1
]}

Politano, G. G. ^{[1
]}

Lisi, N. ^{[2
]}

Capasso, A. ^{[3
]}

Messina, G. ^{[1
]}

机构：

[1] Univ Mediterranea Reggio Calabria, Dept Informat Engn Infrastruct & Sustainable Energ, I-89122 Calabria, Italy

[2] Agenzia Nazl Nuove Tecnol Energia & Sviluppo Econ, Casaccia Res Ctr, I-00123 Rome, Italy

[3] Int Iberian Nanotechnol Lab INL, P-4715330 Braga, Portugal

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2024年 / 36卷 / 19期

关键词：

GERS; graphene defects; nanocrystalline CVD graphene; GRAPHITE; DISORDER;

D O I：

10.1088/1361-648X/ad238a

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Defects and nanocrystalline grain structures play a critical role in graphene-enhanced Raman spectroscopy (GERS). In this study, we selected three types of few-layer, polycrystalline graphene films produced by chemical vapor deposition (CVD), and we tested them as GERS substrates. The graphene structure was controlled by decreasing the CVD temperature, thus obtaining (i) polycrystalline with negligible defect density, (ii) polycrystalline with high defect density, (iii) nanocrystalline. We applied rhodamine 6G as a probe molecule to investigate the Raman enhancement. Our results show that nanocrystalline graphene is the most sensitive GERS substrate, indicating that the GERS effect is primarily connected to the nanocrystalline structure, rather than to the presence of defects.

引用

页数：6

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