**6. Antioxidant Functionalized Nanoparticles**

Bacteria, algae, fungi, lichens and plants are known to contain diverse bioactive compounds like terpenoids, alkaloids, polyphenols, phenolic acids etc. These bioactive compounds show potential antioxidant activity, and are known to reduce and stabilize the metallic ions. The diverse types of antioxidant functionalized nanoparticles derived from various biological extracts (Table 3) are discussed in the following sections.



**Table 3.**

*Cont*.


**Table**

**3.**

*Cont*.



#### *Nanomaterials* **2020**, *10*, 1334

**Antioxidant Source**


**Table3.***Cont*. RT–room temperature; Uiv-vis—ultraviolet–visible spectroscopy; TEM—transmission electron microscopy; SEM—scanning electron microscopy; FT-IR—Fourier-transform infraredspectroscopy; XRD—X-ray powder diffraction; EDX—energy dispersive X-ray spectroscopy; DLS—dynamic light scattering; HRTEM—high-resolution transmission electron microcopy;AFM—atomic force microscopy; ND—not defined; NS—not specified; Nd—not determ.

#### *Nanomaterials* **2020**, *10*, 1334
