Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : TEM


Fabrication and Characterization for Phosphate Nanofertilizer through Polymer Coating Technique

Azhar M. Haleem

Engineering and Technology Journal, 2020, Volume 38, Issue 1B, Pages 34-40
DOI: 10.30684/etj.v38i1B.576

Many organic and inorganic materials were used to enhance plant growth and soil fertility, in the present study phosphate and polyvinyl alcohol ( PVA) was used to prepare nanocapsules fertilizer by using Emulsification Solvent Diffusion Method (ESDM), nanocapsules of phosphate and polymer provide long-term sustained-release preparations, ensure long existence of fertilizer in attach with the plant. Particle size distribution was evaluated in addition to particle shapes were characterized by Transmission Electron Microscope (TEM), the activity of Nano-fertilizer was studied on Nigella sativa production and its extracts activity. The emulsification solvent diffusion method (ESDM) provided a good yield of P-nanofertilizer, nanoparticles size distribution ranged 40-150nm with particle size range 74.23nm

Fabrication Solar Cell Device From CdTe Nanoparticles Suspension

Mayyadah H. Mohsin; Amenah Ali Salman

Engineering and Technology Journal, 2015, Volume 33, Issue 8, Pages 1513-1521

In the present study ,nanoparticles cadmium telluride (cdte) on si p-type substrates heterojunction solar cell has been made byusingpulse laser ablation PLA.Q-switching, Nd:YAG laser (500mj,9ns),wavelength 532nm with number of pluses(60 and 120)pulseusingofthe bulk materials target in methanol solution. Optical, structure characterization of Nanoparticles suspensions studies by using UV-Vis spectrophotometry, X-ray diffraction (XRD), transmission electron microscopy (TEM).The photovoltaic characteristics included short circuit current and open circuitvoltage (ISC –VOC), where the maximum (Jsc) and(voc)obtained were 25.3 mAcm-2 and 144.9mv respectively. The fill factor(ff) was( 0.42) and the conversion efficiency(1.5% ).

Synthesis and Studying Dielectric Properties of Mixed Nanoferrites

Zainab I. Dhary; Mohammed S. Hamza; Fadhil A. Chyad

Engineering and Technology Journal, 2015, Volume 33, Issue 1, Pages 154-164

Based on a low temperature route (sol-gel autocombustion) a nano-ferrite CoFe2O4and Li0.5Fe2.5O4 and different percentages of cobalt-ferrite are synthesized. The crystalline structure by XRD and dielectric properties with TEM micrographs are presented. The XRD (crystallite size and lattice parameter) are determined which affected by cobalt content. TEM micrographs show a nano-particles in the range of (8-20) nm which correlate with crystallite size. Dielectric properties (dielectric constant, loss tangent and dielectric loss factor) are decreased with frequency and cobalt content.

Synthesis and Studying SomeMechanical Properties of Nanocomposite

Fadhil A. Chyad; Abdul-Raheem K.Abid Ali; Auday A. Mehatlaf

Engineering and Technology Journal, 2013, Volume 31, Issue 7, Pages 1221-1228

This study aims to synthesis a nanocomposite from Al2O3 – Cr2O3 and studying some of its mechanical properties like microhardness and fracture strength.
X-Ray diffraction patterns shows a good crystallinity of the composite with very sharp and neat peaks. TEM photographs shows the good distribution of the particles which have an average particle size of (3-6 nm). The microhardness is increased with the increasing of sintering temperatures having the height value at 15% chromia while the fracture strength behaves as a bell shape having again the height value at 15% chromia.

Synthesis of Carbon Nanomaterials in Deionized Water with and without Catalyst Using Arc Discharge Technique

Abdul Qader D. Faisal; Mufeed A. Jaleel; Aysar S. Keiteb

Engineering and Technology Journal, 2011, Volume 29, Issue 2, Pages 240-252

Simple and economical technique was used for synthesis of carbon
nanomaterials without using vacuum equipment. The used technique implied an
arc discharge between two pure graphite rods with different diameters submerged
in deionized water at room temperature. These were also investigated with a new
type of metal catalyst process for the first time. Plasma arc discharge was
produced using D.C power supply with current (30-90 amp.) and voltage (30-
50volt). The nanomaterials were produced in the form of nanoparticles (floated),
nanotubes and nanofibers (sank), and carbon nanocolloidal (dispersed) through the
water. The results of these experiments were examined by high resolution optical
microscope, scanning electron microscope SEM and transmission electron
microscope TEM. The results revealed different types of carbon nanomaterials.