నానోమెడిసిన్ & నానోటెక్నాలజీ జర్నల్

నైరూప్య

Chemically Grown MoO3 Nanorods for Antibacterial Activity Study

Neha Desai, Sawanta Mali, Vijay Kondalkar, Rahul Mane, Chang Hong and Popatrao Bhosale

In the present investigation, sea urchin like morphology of h-MoO3 nanorods are successfully synthesized by chemical bath deposition (CBD) technique. The thermal stability, structural details, morphology and compositional analysis of MoO3 was done using thermogravimetry (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HR-TEM), selected area electron diffraction (SAED) and X-ray photoelectron spectroscopy (XPS) techniques respectively. The thermal analysis reveals presence of sharp exothermic peak at 409ºC indicating irreversible phase transition. X-ray diffraction pattern showed hexagonal to orthorhombic phase transition after annealing at 450ºC. As synthesized h-MoO3 shows well oriented hexagonal rods with sea urchin like architecture while that of annealed MoO3 sample revealed 2D layer by layer growth. The SAED pattern confirms single crystalline nature of as synthesized h-MoO3 and polycrystalline nature of annealed α-MoO3. While XPS study of both confirms Mo+6 and O2- oxidation states of elements. Furthermore, characteristic antibacterial properties of h-MoO3 and α- MoO3 against gram positive Bacillus megaterium, Streptococcus aureus and gram negative Escherichia coli is noted.