Fig. 5. Elemental mapping of Ag NPs/CS-Starch bio-composite.
The crystalline nature, phase behavior and purity of the Ag NPs/CS-Starch nanocomposite was ascertained by XRD investigations. A broad diffraction signal found in Fig. 6 in the 2θ region up to 2θ = 20o was contributed from poorly crystalline CS-Starch composite. The further region is however fairly crystalline, attributed to Ag fcc unit cell. It displays the characteristic Bragg’s diffraction peaks at 2θ = 38.4°, 44.5°, 65.2° and 78.1° related to the Ag fcc (111), (200), (220) and (311) crystalline planes. These signals resemble closely to the standard (JCPDS No.87-0717).