N
O
O
O
O
N
O
O
O
O
O
O
OH
OH
HO
HO
O
NH 2
NH
O
n
x
50% Triflouroacetic Acid
H 2 O
Heat at 80° C
for 25 min
O
O
O
OH
OH
HO
HO
O
N
NH
O
n
x
N
O
O
S
S
OH
O
+
NaBH4
QD
Lipoic acid
O
O
O
OH
OH
HO
HO
O
NH 2
NH
O
n
x
O
O
O
OH
OH
HO
OH
O
NH 3
NH
O
n
x
S
S
O
O
Chitosan
CBD
O
O
O
OH
OH
HO
OH
O
NH 3
NH
O
n
x
HS
HS
O
O
O
O
O
OH
OH
HO
HO
O
NH 3
NH
O
n
x
HS
HS
O
O
QD
(c) Fullerene-based chitosan derivative [198]
(d) Immobilization of gold nanoparticles onto thiol-functionalized chitosans
Fig. 1 Preparation of chitosan-based functional nanomaterials. (a) Preparation of quantum dot
(QD). (b) Chitosan-GNP derivative. (c) Fullerene-based chitosan derivative [198]. (d) Immobilization of gold nanoparticles onto thiol-functionalized chitosans
36
P. Dutta et al.