Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Nanostructure


Preparation of Carbon Nanotube by Pulse Laser Ablation of Graphite Target in Demonized Water

Khawla S. khashan; Mayyadah H. Mohsin

Engineering and Technology Journal, 2014, Volume 32, Issue 1, Pages 61-71

In the present work, carbon nanotube was synthesis by pulse laser ablation of graphite target in deionize-water. Fourier Transform Infrared Spectroscopy (FTIR), UV-Visible Spectrophotometer and Transmission electron Microscopy (TEM) were used to study chemical bonding, optical absorption, particle size, structure and morphology of the carbon nanotube. The FTIR absorption peaksat 2092.6
cm-1, 2150 and 1641.3 cm-1is due to the C ≡ C and C = C stretching vibration bondrepresents, which suggest the formation of carbon nanoparticles suspend in this suspension, UV absorption peaks coincide with the electronic transitions corresponding to linear hydrogen – capped polyyne (Cn+1H2), polyynes are important precursor molecular components in the formation of carbon nanotubes. The TEM show the aggregation of the carbon nanoparticles with size ranges from (9.4 – 70.5 nm), the structure and morphology of thenanotube can be observed with diameters (12.5 -25) nm andlength(500 -708.3) nm.

Carbon Nanotube Prepared by Pulse Laser Ablation of Graphite Target in Iso-Propanol Solution

Khawla S. khashan; Mayyadah H. Mohsin

Engineering and Technology Journal, 2013, Volume 31, Issue 16, Pages 3078-3089

In this work carbon nanotube was synthesis by pulse laser ablation of graphite
target in Iso-propanol solution. Fourier Transform Infrared Spectroscopy (FTIR),
UV-Visible Spectrophotometer and Transmission Electron Microscopy (TEM)
were used to study chemical bonding, optical absorption, particle size, structure
and morphology of the carbon nanotube. The FTIR absorption peak at 2335.6,
1647.1 cm-1& 1269.1 cm-1 stretching vibration bond, it is inferred that the C ≡ C ,
C = C and C-C, respectively. Bonds suggests the formation carbon nanoparticles
suspend in this solvent, UV absorption peaks coincide with the electronic
transitions corresponding to linear hydrogen – capped polyyne (Cn+1H2), polyynes
are important precursor molecular components in the formation of carbon
nanotubes. The TEM show the aggregation of the carbon nanoparticles with size
ranges from (1.66 to 41.6 nm), the structure and morphology of the CNT’s with
diameter at range 11.1 – 46.15 nm and length at range 261.1 - 592.3 nm.

Study on the Effect of Annealing on Structural and SensingProperties of CdO Thin Films for (CO2 ,H2S) Gases

Hayder Mohammed Ajeel; Shatha Shammon Batros; Ashwaq Abdul Hussin Jabor; Karamh Abd Ali

Engineering and Technology Journal, 2012, Volume 30, Issue 19, Pages 3410-3420

Cadmium oxide (CdO) thin films have been deposited by Successive Ionic
Layer Adsorption and Reaction (SILAR) method by using cadmium acetate at
concentration 0.03 M and based solution from ammonium hydroxide on glass
substrate. The structural and sensing properties of the as -deposited and annealed
films are studied in details. The XRD and AFM analysis for its structural
characteristic has been preformed .The average grain size of deposited film are
increased after annealing . The sensing properties also are calculated and it is
found that the sensitivity are increasing after annealing, and for CO2 gas are
better than the sensitivity for H2S gas . The I-V properties are calculated for the
films before and after annealing for the two gases.