Electromagnetic wave absorption and compressive behavior of a three-dimensional metamaterial absorber based on 3D printed honeycomb

Jiang, Wei; Yan, Leilei; Ma, Hua; Yang, Fan; Wang, Jiafu; Feng, Ming; Qu, Shaobo

doi:10.1038/s41598-018-23286-6

Cited by 129 publications

(66 citation statements)

References 33 publications

(29 reference statements)

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“…U ltra-black materials, those with both exceptionally low reflectance and high absorbance, have the potential to increase photovoltaic cell efficiency, improve stray light capture in telescopes, and inform the design of infrared or radar camouflage, among other applications [1][2][3][4] . Currently, most synthetic ultra-black materials are made from nano-patterned metals or carbon nanotubes 5,6 .…”

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confidence: 99%

Diverse nanostructures underlie thin ultra-black scales in butterflies

2020

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Recently, it has been shown that animals such as jumping spiders, birds, and butterflies have evolved ultra-black coloration comparable to the blackest synthetic materials. Of these, certain papilionid butterflies have reflectances approaching 0.2%, resulting from a polydisperse honeycomb structure. It is unknown if other ultra-black butterflies use this mechanism. Here, we examine a phylogenetically diverse set of butterflies and demonstrate that other butterflies employ simpler nanostructures that achieve ultra-black coloration in scales thinner than synthetic alternatives. Using scanning electron microscopy, we find considerable interspecific variation in the geometry of the holes in the structures, and verify with finite-difference time-domain modeling that expanded trabeculae and ridges, found across ultra-black butterflies, reduce reflectance up to 16-fold. Our results demonstrate that butterflies produce ultra-black by creating a sparse material with high surface area to increase absorption and minimize surface reflection. We hypothesize that butterflies use ultra-black to increase the contrast of color signals.

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confidence: 99%

Diverse nanostructures underlie thin ultra-black scales in butterflies

2020

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“…The electromagnetic wave absorptivity can be expressed as [11,26]:A=1−|S11|2−|S21|2 where A represents the electromagnetic wave absorptivity, while |S11|2 and |S21|2 represent the reflectivity and the transmissivity, respectively. Note that, in this calculation, S11 and S21 are linear values.…”

Section: Resultsmentioning

confidence: 99%

Enhancement by Metallic Tube Filling of the Mechanical Properties of Electromagnetic Wave Absorbent Polymethacrylimide Foam

et al. 2019

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By the addition of a carbon-based electromagnetic absorbing agent during the foaming process, a novel electromagnetic absorbent polymethacrylimide (PMI) foam was obtained. The proposed foam exhibits excellent electromagnetic wave-absorbing properties, with absorptivity exceeding 85% at a large frequency range of 4.9–18 GHz. However, its poor mechanical properties would limit its application in load-carrying structures. In the present study, a novel enhancement approach is proposed by inserting metallic tubes into pre-perforated holes of PMI foam blocks. The mechanical properties of the tube-enhanced PMI foams were studied experimentally under compressive loading conditions. The elastic modulus, compressive strength, energy absorption per unit volume, and energy absorption per unit mass were increased by 127.9%, 133.8%, 54.2%, and 46.4%, respectively, by the metallic tube filling, and the density increased only by 5.3%. The failure mechanism of the foams was also explored. We found that the weaker interfaces between the foam and the electromagnetic absorbing agent induced crack initiation and subsequent collapses, which destroyed the structural integrity. The excellent mechanical and electromagnetic absorbing properties make the novel structure much more competitive in electromagnetic wave stealth applications, while acting simultaneously as load-carrying structures.

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“…Honeycomb and its composite structures have attracted tremendous attention because of their significant benefits on energy absorption, thermal buckling resistance, and electromagnetic absorption properties. The height, maximum inner radius, and thickness of the honeycomb are considered the main factors affecting RAM properties [ 18 , 19 , 20 , 21 ]. Sandwich structures with honeycomb cores have also been widely investigated and applied as engineering structures for their excellent mechanical and EMW absorption performance [ 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Wave Absorption Properties of Structural Conductive ABS Fabricated by Fused Deposition Modeling

Lai

Wang

2020

Polymers

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To obtain excellent electromagnetic wave (EMW) absorption materials, the design of microstructures has been considered as an effective method to adjust EMW absorption performance. Owing to its inherent capability of effectively fabricating materials with complex various structures, three-dimensional (3D) printing technology has been regarded as a powerful tool to design EMW absorbers with plentiful microstructures for the adjustment of EMW absorption performance. In this work, five samples with various microstructures were prepared via fused deposition modeling (FDM). An analysis method combining theoretical simulation calculations with experimental measurements was adopted to investigate EMW absorbing properties of all samples. The wood-pile-structural sample possessed wider effective absorption bandwidth (EAB; reflection loss (RL) < − 10 dB, for over 90% microwave absorption) of 5.43 GHz and generated more absorption bands (C-band and Ku-band) as compared to the honeycomb-structural sample at the same thickness. Designing various microstructures via FDM proved to be a convenient and feasible method to fabricate absorbers with tunable EMW absorption properties, which provides a novel path for the preparation of EMW absorption materials with wider EAB and lower RL.

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Electromagnetic wave absorption and compressive behavior of a three-dimensional metamaterial absorber based on 3D printed honeycomb

Cited by 129 publications

References 33 publications

Diverse nanostructures underlie thin ultra-black scales in butterflies

Diverse nanostructures underlie thin ultra-black scales in butterflies

Enhancement by Metallic Tube Filling of the Mechanical Properties of Electromagnetic Wave Absorbent Polymethacrylimide Foam

Electromagnetic Wave Absorption Properties of Structural Conductive ABS Fabricated by Fused Deposition Modeling

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