Yonsei University

Hwanseong Lee

Hyung Hee Cho

Beom Seok Kim

Taeil Kim

Namkyu Lee

Donghwi Lee

Hoanju Yoo

Taehwan Kim

Dong Il Shim

Hokyu Moon

Ji-Yeul Bae

Geehong Choi

A technique of adjusting absorptivity of radar waves and emissivity of infrared waves by controlling the waves of the radar and infrared regions using a structure formed of a meta-material. A composite structure for controlling absorptivity and emissivity includes: a first anti-detection unit; and a second anti-detection unit stacked on the first anti-detection unit, wherein the first anti-detection unit is an absorber for absorbing electromagnetic waves of a first range input from an outside of the first anti-detection unit, and the second anti-detection unit is a selective emitter for selectively blocking emission of electromagnetic waves of a second range and selectively allowing emission of electromagnetic waves of a third range among electromagnetic waves that can be emitted to an outside of the second anti-detection unit.

Composite structure for controlling absorptivity of radar and emissivity of infrared regions

Provided are a carrier for a dry adsorbent for carbon dioxide, including spherical silica whose surface is engraved in the form of nanowires, and a method for preparing the same. Although the carrier for a dry adsorbent for carbon dioxide including spherical silica that has nanowires on the surface thereof has a very non-uniform shape, it serves better as a host structure adsorbing carbon dioxide as compared to the conventional carrier for a carbon dioxide adsorbent, and thus may be used for a host-guest adsorbent applicable to a fluidized bed process. In addition, the method for preparing a carrier for a carbon dioxide adsorbent provides nanowire-coated silicon spheres having an increased surface roughness and an increased surface area, thereby providing increased carbon dioxide capturing efficiency. Further, since the method for forming nanowires is simple, it is easy to carry out mass production without any separate process, thereby providing excellent cost efficiency.

Carrier for dry adsorbent for carbon dioxide including spherical silica whose surface is engraved in the form of nanowires and method for preparing the same

Growing community of inventors

Hongseong-gun, South Korea

Hwanseong Lee