Carbon nanolayer-mounted single metal sites enable dipole polarization loss under electromagnetic field

Siyao Cheng, Daohu Sheng, Soumya Mukherjee, Wei Dong, Yuanbiao Huang, Rong Cao, Aming Xie (), Roland A. Fischer and Weijin Li ()
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Siyao Cheng: Nanjing University of Science and Technology
Daohu Sheng: Nanjing University of Science and Technology
Soumya Mukherjee: University of Limerick
Wei Dong: Nanjing University of Science and Technology
Yuanbiao Huang: Chinese Academy of Sciences
Rong Cao: Chinese Academy of Sciences
Aming Xie: Nanjing University of Science and Technology
Roland A. Fischer: Lichtenbergstrasse 4
Weijin Li: Nanjing University of Science and Technology

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract Surface modulation strategies have spurred great interest with regard to regulating the morphology, dispersion and flexible processability of materials. Unsurprisingly, customized modulation of surfaces is primed to offer a route to control their electronic functions. To regulate electromagnetic wave (EMW) absorption applications by surface engineering is an unmet challenge. Thanks to pyrolyzing surface-anchored metal-porphyrin, here we report on the surface modulation of four-nitrogen atoms-confined single metal site on a nitrogen-doped carbon layer (sM(N4)@NC, M = Ni, Co, Cu, Ni/Cu) (sM=single metal; NC= nitrogen-doped carbon layer) that registers electromagnetic wave absorption. Surface-anchored metal-porphyrins are afforded by attaching them onto the polypyrrole surface via a prototypical click reaction. Further, sM(N4)@NC is experimentally found to elicit an identical dipole polarization loss mechanism, overcoming the handicaps of conductivity loss, defects, and interfacial polarization loss among the current EMW absorber models. Importantly, sM(N4)@NC is found to exhibit an effective absorption bandwidth of 6.44 and reflection loss of −51.7 dB, preceding state-of-the-art carbon-based EMW absorbers. This study introduces a surface modulation strategy to design EMW absorbers based on single metal sites that enable fine-tunable and controlled absorption mechanism with atomistic precision.

Date: 2024
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DOI: 10.1038/s41467-024-53465-1

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