Table 6.

Bark mediated synthesis of gold nanoparticles.

S. No	Scientific name	Family	Common name	Characterization	Size (nm)	Shape	Reference
1.	Cassia fistula	Fabaceae	Golden rain tre	FTIR, UV−650 spectrophotometer, FTIR, SEM	55.2–98.4	–	[87]
2.	Eucommia ulmoides	Eucommiaceae	Hardy rubber tree	UV–Visible spectroscopy, HRTEM, EDX, XRD, RA-FTIR	16.4	Spherical	[88]
3.	Acacia nilotica	Fabaceae	Prickly acacia	UV–vis, FT-IR, XRD, TEM,	10–50	Quasi-spherical	[89]
4.	Ficus religiosa	Moraceae	Peepal tree	UV-Vis, XRD, TEM and FTIR	20–30	Triangle,Pentagon's and hexagons	[90]
5.	Pistia stratiotes L	Araceae	Arum	UV–visible spectroscopy, EDAX, SEM, TEM	2–40	Spherical	[26]
6.	Hypericum hookerianum	Guttiferae	St. John's wort	UV-Vis, XRD, FESEM,	S1−10–70, S2−10–50	Spherical shape	[41]