Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : ZnO nanoparticles

Synthesis Nano Zinc Oxide Materials and Their Activity on Fungus Growth

A. J. Bohan; E.D. Alhtheal; Kh. S. Shaker

Engineering and Technology Journal, 2017, Volume 35, Issue 1B, Pages 76-84
DOI: 10.30684/etj.2017.136710

In this study Zinc oxide Nano particles was synthesized by employing sol-gel technique to explore novel antifungal agents to beat the developed of fungi resistance to many conventional fungicides .Prepared of Zinc oxide Nano particles were investigated via using Scanning Electron Microscopy (SEM, the VEGA Easy Probe), X ray powder diffraction (XRD) , FTIR spectrum, The antifungal properties of ZnO nanoparticles were tested against Fussarium spp., Alternaria spp. , Penicillium spp. , and Aspergillus spp. by using agar diffusion method. The percentage of growth was lowest comparison with control for all types of fungi when used zinc oxide Nano in different concentration.

Effect of (ZnO/MWCNTs) Hybrid Concentrations on Microbial Pathogens Removal

Duha S. Ahmed; Ali L. Abed; Azhar J. Bohan; Jhan Y. Rbat

Engineering and Technology Journal, 2015, Volume 33, Issue 8, Pages 1402-1411

In this study, hybridmaterial like ZnO coated multi-walled carbon nanotubes (ZnO/MWCNTs) was formation by a multistep chemical procedure and evaluated for their application potentials as an antimicrobial agent for slowing down bacterial growth as bacteriostatic and inactivating pathogenic bacteria as bactericidal. The prepared carbon nanotubes and ZnO nanoparticles were investigated by using X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). The antimicrobial properties of hybrid material (ZnO/MWCNTs) were tested against Salmonella typhi (S.typhi), Pseudomonas aeruginosa (P. aeruginosa) which are Gram-negative and Staphylococcus aureus (S. aureus) which is Gram-positive by using standard agar dilution (plate count) method.

Optoelectronic properties of ZnO/PS/n-Si Heterojunctions

Khawla S. Khashan

Engineering and Technology Journal, 2008, Volume 26, Issue 4, Pages 442-448

In this work a colloid of nanocrystalline ZnO particles is prepared by
chemical method, and then sprayed on porous silicon substrate which is prepared
by electrochemical etching under a current density of 15mA/cm2 for 10 min. The
initial radius of the ZnO particles is found to be (2.2 nm). FTIR spectra exhibit the
presence of Zn – O bond which indicates the formation of ZnO particles. Also
spectra reveals the formation of SiHx (x=1-2) and Si-O bond which indicates the
presence of porous layer. High performance rectifying was obtained, with high
photoresponsivety of 0.54 A/W at 400 nm. The corresponding quantum efficiency
was 166.7%.The results show that ZnO on porous silicon (PS) structures will act as
good candidates for making highly efficient photodiodes.