• Korean Journal of Optics and Photonics
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• v.24 no.3
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• pp.143-147
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• 2013

A Raman spectrometer is essential for analyzing the characteristics of graphene. The commercial micro-Raman spectrometer is useful for measuring small areas, but due to the small measuring area, it has limited use in industry, as a sampling measure. This paper suggests a Raman spectrometer able to get a large area image of graphene. By using this image, we can get information on defects and on the presence of graphene. Therefore, this equipment can be used for quality assessment for production of graphene.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.2
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• pp.167-171
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• 2014

Using chemical vapor deposition(CVD), the synthesis of graphene was performed on poly and single crystalline Cu substrates. The growth behavior of graphene and its characterization were shown utilizing the optical microscopic image and its image analysis. As a result in the analysis of graphene growth, it was found out the graphene is growing always in particular direction in relation to the crystalline direction of a single grain in polycrystalline Cu substrate. With the image analysis it was possible to show the characterization of graphene, such as the growth direction and the number of layers showing single, double and triple layers, within the neighboring single grains in polycrystalline Cu. In addition, the relatively large area of graphene with about $3mm^2$ on Cu(111) having high quality, single layer, and single crystalline was shown along with its characterization.