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Sensors 2016, 16(4), 521; doi:10.3390/s16040521

Stretchable Metamaterial Absorber Using Liquid Metal-Filled Polydimethylsiloxane (PDMS)

School of Electrical and Electronics Engineering, Chung-Ang University, Seoul 156-756, Korea
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Author to whom correspondence should be addressed.
Academic Editors: Ferran Martín and Jordi Naqui
Received: 2 February 2016 / Revised: 25 March 2016 / Accepted: 6 April 2016 / Published: 11 April 2016
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Abstract

A stretchable metamaterial absorber is proposed in this study. The stretchability was achieved by liquid metal and polydimethylsiloxane (PDMS). To inject liquid metal, microfluidic channels were fabricated using PDMS powers and microfluidic-channel frames, which were built using a three-dimensional printer. A top conductive pattern and ground plane were designed after considering the easy injection of liquid metal. The proposed metamaterial absorber comprises three layers of PDMS substrate. The top layer is for the top conductive pattern, and the bottom layer is for the meandered ground plane. Flat PDMS layers were inserted between the top and bottom PDMS layers. The measured absorptivity of the fabricated absorber was 97.8% at 18.5 GHz, and the absorption frequency increased from 18.5 to 18.65 GHz as the absorber was stretched from its original length (5.2 cm) to 6.4 cm. View Full-Text
Keywords: liquid metal; metamaterial absorber; microfluidics; strain sensor; stretchable liquid metal; metamaterial absorber; microfluidics; strain sensor; stretchable
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Kim, K.; Lee, D.; Eom, S.; Lim, S. Stretchable Metamaterial Absorber Using Liquid Metal-Filled Polydimethylsiloxane (PDMS). Sensors 2016, 16, 521.

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