Fig. 1(Color online) Schematic drawing of the growth of hexagonal Ge microcrystals by a method similar to the formation of dew in spider silk. (a) Al-based nano absorber. (b) Adsorption of various molecules. (c) Formation of Ge dew. (d) Enlarged figure of dotted line area in
(c). (e) Formation of hexagonal Ge microcrystals. (f) Falling of hexagonal Ge microcrystals.
