Hollow carbon spheres in microwaves: Bio inspired absorbing coating.

Authors :: Bychanok, D.
Li, S.
Sanchez-Sanchez, A.
Gorokhov, G.
Kuzhir, P.
Ogrin, F. Y.
Pasc, A.
Ballweg, T.
Mandel, K.
Szczurek, A.
Fierro, V.
Celzard, A.
Source :: Applied Physics Letters; 1/1/2016, Vol. 108 Issue 1, p1-5, 5p, 1 Black and White Photograph, 1 Diagram, 1 Chart, 5 Graphs
Publication Year :: 2016
Abstract: The electromagnetic response of a heterostructure based on a monolayer of hollow glassy carbon spheres packed in 2D was experimentally surveyed with respect to its response to microwaves, namely, the Ka-band (26-37 GHz) frequency range. Such an ordered monolayer of spheres mimics the well-known "moth-eye"-like coating structures, which are widely used for designing anti-reflective surfaces, and was modelled with the long-wave approximation. Based on the experimental and modelling results, we demonstrate that carbon hollow spheres may be used for building an extremely lightweight, almost perfectly absorbing, coating for Ka-band applications. [ABSTRACT FROM AUTHOR]