Characterization of chemical vapor deposition-grown graphene films with various etchants
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서지정보
ㆍ발행기관 : 한국탄소학회
ㆍ수록지정보 : Carbon Letters / 13권 / 1호
ㆍ저자명 : HongKyw Choi, Jong Yun Kim, Hu Young Jeong, Choon-Gi Choi1 , Sung-Yool Choi
ㆍ저자명 : HongKyw Choi, Jong Yun Kim, Hu Young Jeong, Choon-Gi Choi1 , Sung-Yool Choi
목차
1. Introduction2. Experimental
3. Results and Discussion
4. Conclusions
Acknowledgements
References
한국어 초록
We analyzed the effect of etchants for metal catalysts in terms of the characteristics of resulting graphene films, such as sheet resistance, hall mobility, transmittance, and carrier concentration. We found the residue of FeCl3 etchant degraded the sheet resistance and mobility of graphene films. The residue was identified as an iron oxide containing a small amount of Cl through elemental analysis using X-ray photoelectron spectroscopy. To remove this residue, we provide an alternative etching solution by introducing acidic etching solutions and their combinations (HNO3, HCl, FeCl3 + HCl, and FeCl3 + HNO3). The combination of FeCl3 and acidic solutions (HCl and HNO3) resulted in more enhanced electrical properties than pure etchants, which is attributed to the elimination of left over etching residue, and a small amount of amorphous carbon debris after the etching process.영어 초록
We analyzed the effect of etchants for metal catalysts in terms of the characteristics of resulting graphene films, such as sheet resistance, hall mobility, transmittance, and carrier concentration. We found the residue of FeCl3 etchant degraded the sheet resistance and mobility of graphene films. The residue was identified as an iron oxide containing a small amount of Cl through elemental analysis using X-ray photoelectron spectroscopy. To remove this residue, we provide an alternative etching solution by introducing acidic etching solutions and their combinations (HNO3, HCl, FeCl3 + HCl, and FeCl3 + HNO3). The combination of FeCl3 and acidic solutions (HCl and HNO3) resulted in more enhanced electrical properties than pure etchants, which is attributed to the elimination of left over etching residue, and a small amount of amorphous carbon debris after the etching process.참고 자료
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