Fig. 2(Color online) FE-SEM and high-resolution optical 3D surface analyzer (KEYENCE's VHX-7000) images for the phenomenon of Ge dew forming on the actually formed Al-based nano absorber. (a) FE-SED image. (b) High-resolution optical 3D surface analyzer image. (c) Ge dews irregularly adsorbed on Al-based nano absorber. (d) Enlarged figure of
(c). (e) Real spider web image.
