[16a-315-1~10] 8.5 Plasma nanotechnology

[16a-315-10] Tailoring of nanostructures on porous tungsten skeleton by helium plasma irradiation

〇Shin Kajita¹, Hirohiko Tanaka², Noriyasu Ohno² (1.IMaSS, Nagoya Univ., 2.Nagoya Univ.)

Keywords:metallic nanostructures, helium bubbles, helium plasmas

Porous tungsten skeleton, which was fabricated by sintering of tungsten powder, was exposed to helium plasmas, and the surface was tailored with tungsten nanostructures. The hemispherical optical reflectance of the samples was measured at the wavelength of 633 nm. It was shown that the optical reflectance of the porous tungsten skeleton was lower than that of flat tungsten samples. The minimum reflectance was 0.4%, suggesting that the darkest tungsten was fabricated. The advantage of the porous tungsten skeleton with nanostructures for optical application is discussed.