Raman Spectroscopic Studies of Doped Graphene

김안나,; 이몽룡,; 한승호,; 강성준,; 송기국,

doi:10.7317/pk.2015.39.6.956

Cited by 7 publications

(4 citation statements)

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“…IR absorbance [55][56][57][58] and Raman scattering [50,59] have been used to identify the presence of (gauche-gauche-trans-trans), (ggtt) n , helical and all-trans, (tttt) n , planar zigzag conformed chains in sPP [50,[60][61][62][63][64][65]. However, up to date, there are no works concerning the Raman analysis of short chain branched copolymers of syndiotactic polypropylene.…”

Section: Syndiotactic Propylene Copolymersmentioning

confidence: 99%

Morphological Raman analysis of short chain branched ethylene and propylene metallocenic copolymers

et al. 2018

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Section: Syndiotactic Propylene Copolymersmentioning

confidence: 99%

Morphological Raman analysis of short chain branched ethylene and propylene metallocenic copolymers

et al. 2018

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“…Figure 10 shows the Raman spectroscopy specimens, and the results of the spectrum analysis using the Raman spectrometer are provided in Figure 11. The MWCNT-added specimen exhibited a peak at 1350 cm −1 , which was the same as in the graphite spectrum (called G band, with a range of 1330-1360 cm −1 ) [37]. The intensity of the spectrum was the highest (about 78) in the MW-L MWCNTs, indicating that relatively homogeneous dispersion was achieved in the cement composite, compared with the powder MWCNTs.…”

Section: Porositymentioning

confidence: 79%

Influence of Powder and Liquid Multi-Wall Carbon Nanotubes on Hydration and Dispersion of the Cementitious Composites

2020

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Two types of multi-walled carbon nanotubes (MWCNTs), powder and liquid, were added to cementitious composites to build self-sensing concrete. To properly evaluate and quantify the effect of MWCNTs on electrical resistance, various tests, including isothermal conduction calorimetry, were carried out. One of primary issues of self-monitoring concrete is dispersion, so ultrasonication was used to properly mix the CNTs in the dispersion solution, and silica fume was employed to make the specimens. Scanning electron microscopy (SEM), Raman spectroscopy, and porosity analyses were performed to investigate the physical properties of the composites and to confirm uniform dispersion. The distance of the electrical resistance was also measured, and the dosages and types of MWCNTs were analyzed.

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“…It has been reported that the shift in the G peaks from 1581 cm −1 to a longer wavelength (e.g. 1600 cm −1 ) implies the existence of highly disordered graphite and the formation of aromatic clusters [20,32]. To evaluate a relative concentration of amorphous carbon, the ratio between the intensities of the D and G peaks, i.e.…”

Section: Resultsmentioning

confidence: 99%

Carrier transport of all carbonized β-glucosic eco-materials

Lim¹,

Ahn²,

Song³

2020

Nanotechnology

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Attempts have been made to bring eco-friendly biomaterials into high-end electronic devices that require both high performance and durability. Polysaccharides, glycosidically linked monosaccharide units, are of particular interest because they serve as a promising material, owing to their environmentally friendly and adaptable features. We used a carbonized polysaccharide eco-material encompassing nanoparticles and chitosan to study the carrier-transport behavior of β-glucosic materials. Chitosan composites incorporating nanoparticles were prepared and then carbonized to control the crystal structure of the material. Three kinds of metal-insulator-metal devices were fabricated using carbonized materials, and their carrier-transport properties were analyzed. The results showed that the addition of cellulose nano-whiskers (CNWs) into chitosan leads to a more ordered carbon structure, increasing the charge transport in the carbonized material. We anticipate that carbonizing nanoparticle dispersed green composites provides a new pathway for the development of sustainable and environmentally benign material systems.

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Raman Spectroscopic Studies of Doped Graphene

Cited by 7 publications

References 0 publications

Morphological Raman analysis of short chain branched ethylene and propylene metallocenic copolymers

Morphological Raman analysis of short chain branched ethylene and propylene metallocenic copolymers

Influence of Powder and Liquid Multi-Wall Carbon Nanotubes on Hydration and Dispersion of the Cementitious Composites

Carrier transport of all carbonized β-glucosic eco-materials

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