Raman and Micro‐Raman Spectroscopy

Faggio, G.; Grillo, Rossella; Messina, G.

doi:10.1002/9781119698029.ch6

Cited by 3 publications

(1 citation statement)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The D to G integrated intensity ratio (A D /A G ) is a key indicator for the crystalline quality of graphitized carbon materials [26,27]. Additionally, for ordered graphene-based materials, the 2D to G intensity ratio (I 2D /I G ) serves as a criterion to determine the number of graphene layers [28], for single or bilayers I 2D /I G > 1, while for multilayers I 2D /I G < 1 [29]. In the poly-Gr spectrum, bands typically associated with defects (D or D ′ ) are notably absent.…”

Section: Resultsmentioning

confidence: 99%

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

Faggio,

Politano,

Lisi

et al. 2024

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

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 (R6G) 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.

show abstract