Microwave Absorption and Radiation from Large-area Multilayer CVD Graphene
Tuncer, Hatice M
Milne, William Ireland
Bian Wu, Hatice M. Tuncer, Anestis Katsounaros, Weiping Wu, Matthew T. Cole, Kai Ying, Lianhong Zhang, William I. Milne, Yang Hao, "Microwave absorption and radiation from large-area multilayer CVD graphene" Carbon, Available online 9 June 2014, ISSN 0008-6223, http://dx.doi.org/10.1016/j.carbon.2014.05.086.
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Wu, B., Tuncer, H. M., Katsounaros, A., Wu, W., Cole, M. T., Ying, K., Zhang, L., et al. (2015). Microwave Absorption and Radiation from Large-area Multilayer CVD Graphene. Carbon https://doi.org/10.1016/j.carbon.2014.05.086
Here we experimentally study the microwave absorption and near-field radiation behaviour of monolayer and few-layer, large-area CVD graphene in the C and X bands. Artificial stacking of CVD graphene reduces the sheet resistance, as verified by non-contact microwave cavity measurements and four-probe DC resistivity. The proposed multilayer stacked graphene exhibits increased absorption determined by the total sheet resistance. The underlying mechanism could enable us to apply nanoscale graphene sheets as optically transparent radar absorbers. Near-field radiation measurements show that our present few-layer graphene patches with sheet resistance more than 600 /sq exhibit no distinctive microwave resonance and radiate less electromagnetic power with increasing layers; however, our theoretical prediction suggests that for samples to be significant as microwave antennas, doped multilayer graphene with sheet resistance less than 10 /sq is required.
This work was funded by the Graphene Research Centre, University of Cambridge, and the Engineering and Physical Sciences Research Council (EPSRC), UK under a Program Grant (EP/K01711X/1). M.T.C thanks the Winston Churchill Trust and the International Young Scientist Research Fellowship, National Natural Science Foundation of China, for generous financial support. B.W. acknowledges the fund support from the China Scholarship Council and National Natural Science Foundation of China No. 61271017.
External DOI: https://doi.org/10.1016/j.carbon.2014.05.086
This record's URL: https://www.repository.cam.ac.uk/handle/1810/245500
Attribution-NonCommercial-NoDerivs 2.0 UK: England & Wales, Creative Commons Attribution Non-Commercial No-Derivatives License 2.0 UK
Licence URL: http://creativecommons.org/licenses/by-nc-nd/2.0/uk/
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