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Pan G, Zhu J, Ma S, et al. Enhancing the electromagnetic performance of Co through the phase-controlled synthesis of hexagonal and cubic Co nanocrystals grown on graphene. ACS Appl Mater Interfaces. 2013;5(23):12716-24doi: 10.1021/am404117v.
Pan, G., Zhu, J., Ma, S., Sun, G., & Yang, X. (2013). Enhancing the electromagnetic performance of Co through the phase-controlled synthesis of hexagonal and cubic Co nanocrystals grown on graphene. ACS applied materials & interfaces, 5(23), 12716-24. https://doi.org/10.1021/am404117v
Pan, Guohua, et al. "Enhancing the electromagnetic performance of Co through the phase-controlled synthesis of hexagonal and cubic Co nanocrystals grown on graphene." ACS applied materials & interfaces vol. 5,23 (2013): 12716-24. doi: https://doi.org/10.1021/am404117v
Pan G, Zhu J, Ma S, Sun G, Yang X. Enhancing the electromagnetic performance of Co through the phase-controlled synthesis of hexagonal and cubic Co nanocrystals grown on graphene. ACS Appl Mater Interfaces. 2013 Dec 11;5(23):12716-24. doi: 10.1021/am404117v. Epub 2013 Nov 22. PMID: 24266516.
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ACS Appl Mater Interfaces. 2013 Dec 11;5(23):12716-24. doi: 10.1021/am404117v. Epub 2013 Nov 22.

Enhancing the electromagnetic performance of Co through the phase-controlled synthesis of hexagonal and cubic Co nanocrystals grown on graphene.

ACS applied materials & interfaces

Guohua Pan, Jia Zhu, Shulan Ma, Genban Sun, Xiaojing Yang

Affiliations

  1. Beijing Key Laboratory of Energy Conversion and Storage Materials and College of Chemistry, Beijing Normal University , Beijing 100875, China.

PMID: 24266516 DOI: 10.1021/am404117v

Abstract

Cobalt is a promising soft metallic magnetic material used for important applications in the field of absorbing stealth technology, especially for absorbing centimeter waves. However, it frequently presents a weak dielectric property because of its instability, aggregation, and crystallographic form. A method for enhancing the electromagnetic property of metal Co via phase-controlled synthesis of Co nanostructures grown on graphene (GN) networks has been developed. Hexagonal close-packed cobalt (α-Co) nanocrystals and face-centered cubic cobalt (β-Co) nanospheres with uniform size and high dispersion have been successfully assembled on GN nanosheets via a facile one-step solution-phase strategy under different reaction conditions in which the exfoliated graphite oxide (graphene oxide, GO) nanosheets were reduced along with the formation of Co nanocrystals. The as-synthesized Co/GN nanocomposites showed excellent microwave absorbability in comparison with the corresponding Co nanocrystals or GN, especially for the nanocomposites of GN and α-Co nanocrystals (the reflection loss is -47.5 dB at 11.9 GHz), which was probably because of the special electrical properties of the cross-linked GN nanosheets and the perfect electromagnetic match in their microstructure as well as the small particle size of Co nanocrystals. The approach is convenient and effective. Some magnetic metal or alloy materials can also be prepared via this route because of its versatility.

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