The atoms condense on the cold surface and, under a range of conditions (usually a high rate of deposition and a low substrate temperature), an amorphous solid is formed as a thin film. Pure silicon can be prepared as an amorphous solid in this manner.

What is an amorphous solid and how does it form?

Amorphous solid, any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice pattern. Such solids include glass, plastic, and gel. Solids and liquids are both forms of condensed matter; both are composed of atoms in close proximity to each other.

How is a crystalline solid converted into amorphous solid?

A crystalline solid can be converted into an amorphous solid by melting it followed by cooling the melt rapidly.