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Issue 39, 2018
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Enhanced electromagnetic wave absorption induced by void spaces in hollow nanoparticles

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Abstract

We developed a facile method for the growth of hollow structured NiCo2O4 nanoparticles on a graphene sheet (NiCo2O4-h/G). The hollow NiCo2O4 nanoparticles have an average diameter of approximately 10.0 nm and a shell thickness of merely 2.5 nm. The NiCo2O4-h/G hybrid exhibited excellent electromagnetic wave absorption with minimal reflection loss below −20 dB at absorber thickness ranging from 2.0 to 5.0 mm, outperforming the solid NiCo2O4 nanoparticles on the graphene sheet. Remarkably, even for a thickness as small as 1.5 mm, the efficient absorption bandwidth and the minimal reflection loss of the hybrid can reach 2.6 GHz and −20.3 dB, respectively. Experimental results and theoretical calculations indicate that the void space in the hollow NiCo2O4 nanoparticles plays a crucial role in the excellent electromagnetic wave absorption property, which greatly increases the dielectric loss and impedance matching characteristics. Our results demonstrate that growing the hollow nanoparticles on a graphene sheet is an efficient way to produce high-performance electromagnetic wave absorbers.

Graphical abstract: Enhanced electromagnetic wave absorption induced by void spaces in hollow nanoparticles

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Publication details

The article was received on 10 Sep 2018, accepted on 17 Sep 2018 and first published on 18 Sep 2018


Article type: Paper
DOI: 10.1039/C8NR07338D
Citation: Nanoscale, 2018,10, 18742-18748
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    Enhanced electromagnetic wave absorption induced by void spaces in hollow nanoparticles

    F. Yan, J. Kang, S. Zhang, C. Li, C. Zhu, X. Zhang and Y. Chen, Nanoscale, 2018, 10, 18742
    DOI: 10.1039/C8NR07338D

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