Synthesis and characterization of intercalated few-layer graphenes

• Shogo Sato

• Hiroaki Ichikawa

• Nobuyuki Iwata

• Hiroshi Yamamoto

Abstract

Toward achieving room-temperature superconductivity, FeCl 3 -intercalated few-layer graphenes (FeCl 3 -FLGs) and Ca-intercalated few-layer graphenes (Ca-FLGs) were synthesized. FeCl 3 -FLGs were synthesized by the two-zone method and Ca-FLGs were synthesized using Ca–Li alloy. The Raman spectra of the FeCl 3 -FLGs showed a lower-intensity peak at 1607 cm −1 than that of the corresponding bare G. The peak at 1607 cm −1 suggested that the sample was stage 4–5 FeCl 3 -FLGs. The room-temperature electrical resistivity of FeCl 3 -FLGs was 2.65 × 10 −5 Ω·m, which linearly decreased with decreasing temperature with a marked change occurring at approximately 200 K. From a XRD pattern of Ca-FLGs, we concluded that Ca is intercalated in FLGs. The room-temperature resistivity of Ca-FLGs was 3.45 × 10 −5 Ω·m, which increased with decreasing temperature.

Journal

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 53 (2S), 02BD04-, 2014-01-29

  IOP Publishing

Keywords

• General Physics and Astronomy
• General Engineering

Details

• CRID: 1360847874818757120
• NII Article ID: 210000143375
• DOI: 10.7567/jjap.53.02bd04
• ISSN: 13474065
• ISSN: 00214922
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.53.02BD04
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.53.02BD04/pdf
• Data Source:
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  • CiNii Articles
  • KAKEN