70
K. Illath et al.
Table 2
(continued)
S. No
Metal
Shape
Size (nm)
Type of
microorganism/bioreductants
Location of
synthesis
References
13
Au
Spherical and hexagonal 20
Hovenia dulcis
fruit extract
Extracellular
[115]
14
Au, Ag
Spherical
5–65
anaerobic enriched mixed
bacteria (AEMB)
Extracellular
[116]
15
Au
Spherical and triangular 5–30
Scutellaria barbata
D. Don
Extracellular
[117]
16
Au
Spherical
4–24
Psidium guajava
leaves extract Extracellular
[118]
17
Au
Spherical
10–50
Brevibacterium casei
18
Ag
Spherical
20–30
leaf extract of Aca- lypha indica
Extracellular
[119]
19
Au
Quasi-spherical
21
Apiin extracted from henna
leaves
Extracellular
[120]
20
Ag
Spherical, triangular
39
Apiin extracted from henna
leaves
Extracellular
[21]
21
Au, Ag &
Ag-Au alloy
Spherical, triangular and
hexagonal
5–35 & 50–100
Azadirachta indica
leaf
Extracellular
[121]
22
Pd
–
3.2–6.0
broth of Cinnamomum
camphora
leaf
Extracellular
[122]
23
Pt
Pd
–
–
Desulfovibrio vulgaris
Periplasmic
space/cellular
surface
[123]
24
Pt
Cuboidal
2–3
Acinetobacter calcoaceticus
PUCM 1011
Intracellular
[124]
25
Pt
hexagons, pentagons,
circles, squares and
rectangles
10–100
Fusarium oxysporum
Intracellular and
extracellular
[125]
(continued)