Table 2.

Overview of silica structures obtained with different silica precipitating biomolecules.

	Silica Morphology		Conditions	References
silaffin-1A	spherical particles		pH 5–5.5	[57]
mixture of native silaffins	cluster of small spheres		pH 5–5.5	[57]
R5 peptide	spherical particles		phosphate buffered solution, neutral pH, static conditions	[60,81,82,169,170]
	arch-shaped		nitrogen stream bubbling through reaction mixture	[169]
	fibrillar		mechanical shear force; electrostatic/hydrodynamic force	[169]
	sheet-like		presence of polyhydroxy compounds (e.g., glycerol)	[170]
poly-l-lysine (PLL)	spherical particles		static conditions	[171,172]
	hexagons		phosphate induced self-assembly of long-chain PLL	[173,174]
	fibrous		electrostatic field, long-chain PLL	[170]
	dendrite-like		hydrodynamic field	[170]
poly(l-cysteine30-b-l-lysine200)	spheres		nitrogen atmosphere	[178]
	packed columns		air-oxidation
lanreotide	double-walled nanotubes		calcination of peptide template after silica formation	[180]
A6K, V6K	fibers		electrostatic field, flow field	[181]