TABLE 1.

General characterization of protein-based nanohydrogels.

Type of characterization	Rheological characterization	Chemical functionality	Morphology and porosity	Thermal stability
Parameters/properties	Viscoelastic character and other relevant parameters like gel strength, gelation time, and yield-strain	Molecular structure and elemental composition	Shape, surface morphology, pore size, pore size distribution, and information of inside the matrix and its nanomaterial	Change in structural strength, physical state, glass transition temperature, and melting point
Techniques/instruments	Strain sweep test, frequency sweep test, time sweep test, temperature sweep test	FT-IR	SEM, TEM, STEM, LSCM, FESEM, AND	DSC
		NMR		TGA
		UV-visible spectroscopy, EDS