Fig. 3. (Color online) FE-SEM images of hexagonal Ge micro crystals formed by Ge dew on Al-based nano absorber and the size of Ge dew vs growth time. (a) Linear type Al-based nano absorber. (b) Crystallization of Al-based nano absorber. (c) Formation of Ge microcrystal. The inset shows an inner image of Ge dew. (d) Size of Ge dews vs growth time.
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