Experimental investigation of surface morphology of a chemical vapor deposition-grown graphene monolayer mediating with a gap-plasmonic system and the related ripple shape study
- Title
- Experimental investigation of surface morphology of a chemical vapor deposition-grown graphene monolayer mediating with a gap-plasmonic system and the related ripple shape study
- Author
- 주재범
- Keywords
- ENHANCED RAMAN-SCATTERING; SUSPENDED GRAPHENE; HIGH-PERFORMANCE; TRANSPARENT; FILMS; FIELD; PLATFORM; SERS
- Issue Date
- 2018-12
- Publisher
- AMER INST PHYSICS
- Citation
- JOURNAL OF APPLIED PHYSICS, v. 124, no. 22, Article no. 223101
- Abstract
- We report a method to characterize z-directional surface roughness of chemical vapor deposition-grown graphene monolayers with the aid of surface-enhanced Raman scattering spectral signatures of "out-of-plane" phonon modes observed at Au nanoparticle (NP)-graphene-Au thin film junctions. This method reveals that intensities of the out-of-plane mode (Radial Breathing Like Mode) are strongly correlated with the Full Width at Half Maximum (FWHM) of the de-convoluted 2D peak. On the basis of our findings, in-plane 2D peak shape can be used as a straightforward, quantitative indicator in estimating surface roughness of graphene without loading Au NPs by calculating the FWHM [ 2D-]/FWHM [2D+] value. Furthermore, we examine the different ripple (RP) shapes on graphene by employing atomic force microscopy-correlated Raman microscopy to identify "threading" and "surrounded" RP types for further investigation on the relationship between spectral features and structural aspects. Electrostatic force microscopy (EFM)-based investigation further substantiates that threading-type RPs in graphene show higher EFM amplitude, indicating that the threading domains tend to be more neutral with a few more sp(3) type defects than the surroundings. Published by AIP Publishing.
- URI
- https://aip.scitation.org/doi/10.1063/1.5066042https://repository.hanyang.ac.kr/handle/20.500.11754/121105
- ISSN
- 0021-8979; 1089-7550
- DOI
- 10.1063/1.5066042
- Appears in Collections:
- GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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