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Chloride-intercalated continuous chemical vapor deposited graphene film with discrete adlayers

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Abstract

Heteroatom doping can open the bandgap and increase the carrier density, thus extending the applications of graphene. Iron chloride (FeCl3) intercalation has proven to be an efficient method for the heavy doping of graphene. In this study, we prepared continuous chemical vapor deposited graphene (CVD-G) consisting of hexagonal adlayer domains to study the FeCl3 intercalation. The structure of the FeCl3-treated CVD-G was easily characterized via atomic force microscopy because of the change in the interlayer distance. FeCl3 crystals several nanometers thick were integrated with the graphene surface, and FeCl3 layer flakes were intercalated between the CVD-G adlayers. The G-band position and two-dimensional band shape in the Raman spectra confirmed the intercalation of the FeCl3 between the graphene layers. The FeCl3 intercalation increased the electrical conductivity of the CVD-G with a well-maintained transmittance, which could be beneficial for a sensitive photodetector.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 51372133 and 51672150) and China Postdoctoral Science Foundation (No. 2015M571019).

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Authors and Affiliations

  1. State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China

    Qiao Chen, Li Zhang & Hongwei Zhu

  2. Center for Nano and Micro Mechanics, Tsinghua University, Beijing, 100084, China

    Qiao Chen & Hongwei Zhu

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  1. Qiao Chen
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  2. Li Zhang
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  3. Hongwei Zhu
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Correspondence to Hongwei Zhu.

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Chen, Q., Zhang, L. & Zhu, H. Chloride-intercalated continuous chemical vapor deposited graphene film with discrete adlayers. Nano Res. 11, 440–448 (2018). https://doi.org/10.1007/s12274-017-1651-y

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