Structural and Optical Characterization of ZnO Nanoparticles Synthesized by Microemulsion Route

Abstract

ZnO nanoparticles were synthesized by microemulsion route in W/S ratio of 5 at room temperature. X-ray diffraction (XRD) pattern reveals wurtzite structure of ZnO nanoparticles. Rod shape of ZnO nanoparticles of average particle size 10.0 to 12.0 nm were observed by transmission electron microscopy. FT-IR spectra confirmed the adsorption of surfactant molecules at the surface of ZnO nanoparticles and presence of Zn-O bonding. Thermal studies were carried out by the differential scanning calorimeter (DSC) techniques. In addition, UV-Visible spectra were employed to estimate the band gap energy of ZnO nanoparticles.

Synthesis, Characterization and Antibacterial Study of Copper Oxide-Graphene Nanocomposites

“…The response of using graphene oxide on microorganisms has been studied extensively. However, the satisfactory results of metal oxide and graphene oxide nanocomposites have not been reported so far [17][18][19][20][21].In continuation to our earlier studies [22][23][24][25][26][27][28], in present study, we have focused on the synthesis of CuO nanoparticles by facile and cost effective sol-gel method and nanocomposite of copper were prepared with reduced graphene oxide. Antibacterial properties of the synthesized nanoparticles and nano- composites were investigated against Gram-positive and Gramnegative bacteria.…”

Improving the optical and electrical properties of Zinc Oxide thin film by Cupric Oxide dopant

“…The peak at 472 cm -1 is the characteristic absorption peak of Zn-O bond [17]. The peak observed at 3451and 1041 cm -1 are may be due to O-H stretching and deformation, respectively assigned to the water adsorption on the metal surface [18]. The topological properties of the thin films have been studied by atomic force microscope (AFM).…”

Effect of γ-Fe2O3 nanoparticles on rheological and volumetric properties of solutions containing polyethylene glycol

“…The obtained particle sizes for c-Fe 2 O 3 nanoparticles in nanofluids of cFe 2 O 3 -PEG400 and c-Fe 2 O 3 -PEG400-PEG6000 are much larger than 80 Å ; thereby, the blue shift of maximum absorption wavelength of UV-Vis cannot be due to the quantum effects. As we know, the optical properties of nanostructures depend on their shapes, sizes and the surrounding environment [24][25][26]. In this work, the preparation conditions are same for bulk-Fe 2 O 3 -PEG400 fluid and c-Fe 2 O 3 -PEG400 nanofluid; the two main differences are the particle size of Fe 2 O 3 in these fluids and interaction of PEG with the surface of c-Fe 2 O 3 nanoparticles which can be higher than the surface of bulk-Fe 2 O 3 .…”