scholarly journals Studying the Effect of Annealing on Optical and Structure Properties of Zno Nanostructure Prepared by Laser Induced Plasma

2019 ◽  
pp. 2168-2176
Author(s):  
Safa Kamal Mustafa ◽  
Raied K. Jamal ◽  
Kadhim Abdulwahid Aadim
Keyword(s):  
Glass Substrate ◽  
Annealing Temperature ◽  
Energy Gap ◽  
Hexagonal Structure ◽  
X Ray Diffraction ◽  
Force Microscopy ◽  
Laser Induced Plasma ◽  
Zno Nanostructure ◽  
Atomic Force ◽  
Uv Visible

In this paper, Zinc oxide were deposited on a glass substrate at room temperature (RT) and two annealing temperatures 350ºC and 500ºC using laser induced plasma technique. ZnO nanofilms of 200nm thickness have been deposited on glass substrate. X-RAY diffraction (XRD), atomic force microscopy and UV-visible spectrophotometer were used to analyze the results. XRD forms of ZnO nanostructure display hexagonal structure with three recognized peaks (100), (002), and (101) orientations at 500ºC annealing temperature. The optical properties of ZnO nanostructure were determined spectra. The energy gap was 3.1 eV at 300 oC and 3.25eV at 500ºC annealing temperature.

Preparation and Characterization of CuO Nanoparticles Prepared by Chemical Method

2021 ◽  
Vol 1021 ◽  
pp. 68-77
Author(s):  
Rashed T. Rasheed ◽  
Liblab S. Jassim ◽  
Hamsa A. Easa ◽  
Shaymaa H. Khazaal
Keyword(s):  
Annealing Temperature ◽  
Energy Gap ◽  
Copper Chloride ◽  
Sol Gel ◽  
Ammonium Hydroxide ◽  
Cuo Nanoparticles ◽  
X Ray Diffraction ◽  
Force Microscopy ◽  
Atomic Force ◽  
Different Temperatures

Copper oxide (CuO) nanoparticles were prepared by the sol-gel method, by the reaction of copper chloride and ammonium hydroxide as procurers. Nanopowders are annealing at different temperatures (100 °C, 200 °C, and 600 °C) for 120 min and confirmed the monoclinic phase by X-ray diffraction analysis of the metal oxide with lattice parameters a = 4.694 Å, b = 3.456 Å and c = 5.165Å for annealing temperature 400°C. Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), and UV-Visible Spectroscopy spectrum was used to determine the structure, average crystallize, and morphology. We found increasing in size and energy gap (Eg) from (62.95 nm to 106.84 nm) and from (1.72 eV to 1.49 eV), when annealing temperature increasing from 200 °C to 600 °C, respectively.

scholarly journals Laser induced plasma of cadmium oxide: structural, morphological and optical properties

2021 ◽  
Vol 2114 (1) ◽  
pp. 012012
Author(s):  
Tamara S. Hussein ◽  
Ala F. Ahmed
Keyword(s):  
Optical Properties ◽  
Energy Gap ◽  
Cadmium Oxide ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Optical Energy Gap ◽  
X Ray ◽  
Laser Induced Plasma ◽  
Atomic Force ◽  
Doping Ratio

Abstract In this study, the effect of grafting with Iron (Fe) ratios (0.1, 0.3 and 0.5) on the structural and optical properties of cadmium oxide films (CdO) was studied, as these films were prepared on glass bases using the method of pulse laser deposition (PLD). The crystallization nature of the prepared films was examined by X-ray diffraction technique (XRD), which showed that the synthesis of the prepared films is polycrystalline, and Atomic Force Microscope (AFM) images also showed that the increased vaccination with Iron led to an increase in the crustal size ratio and a decrease in surface roughness, The absorption coefficient was calculated and the optical energy gap for the prepared thin films. It was found the absorption decreases and the energy gap decreases with the increase of doping ratio.

scholarly journals The effect of replacing iron atoms instead of zinc of the quaternary compound CZTS

2021 ◽  
Vol 2114 (1) ◽  
pp. 012033
Author(s):  
Abubaker.S. Mohammed
Keyword(s):  
Full Width Half Maximum ◽  
Energy Gap ◽  
Film Surface ◽  
X Ray Diffraction ◽  
Quaternary Compound ◽  
Force Microscopy ◽  
Atomic Force ◽  
Coating Method ◽  
Degree Of Crystallization ◽  
High Degree

Abstract In this article, the quaternary compound Cu2MSnS4 was prepared in a simple and inexpensive approach, where M is the iron (Fe) and zinc (Zn) atoms by the spin coating method on a glass substrate at room temperature (RT), as a result of replacing Zn atoms by Fe. Quaternary Cu2ZnSnS4 (CZTS) and Cu2FeSrS4 (CFTS) structural and optical properties have been studied successfully. The material has been identified by X-ray diffraction, and it was discovered that CZTS has a polycrystalline Tetragonal (kesterite) structure, whereas CFTS has a Tetragonal (stannite) structure. A reduction in the full width half maximum (FWHM) of the preferred plane implies a high degree of crystallization. The structural properties of the film surface, such as grain size and roughness, were studied by Atomic force microscopy (AFM). The results explain an increase in nanoparticle size and surface roughness when Fe is substituted by Zn in the CZTS structure. The absorption coefficient values of all designed compounds in visible regions are greater than 104/cm, and the results show that the absorbance coefficient increases with Fe add. The CZTS films showed an energy gap of 1.88 eV, and this value became 1.69 eV with substituted Fe instead of Zn.

Dielectric Properties of Sol-Gel Derived MgAl2O4 Thin Films

2012 ◽  
Vol 151 ◽  
pp. 314-318
Author(s):  
Ching Fang Tseng ◽  
Cheng Hsing Hsu ◽  
Chun Hung Lai
Keyword(s):  
Thin Films ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Dissipation Factor ◽  
X Ray Diffraction ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Preheating Temperature ◽  
Surface Morphologies

This paper describes microstructure characteristics of MgAl2O4 thin films were deposited by sol-gel method with various preheating temperatures and annealing temperatures. Particular attention will be paid to the effects of a thermal treatment in air ambient on the physical properties. The annealed films were characterized using X-ray diffraction. The surface morphologies of treatment film were examined by scanning electron microscopy and atomic force microscopy. At a preheating temperature of 300oC and an annealing temperature of 700oC, the MgAl2O4 films with 9 μm thickness possess a dielectric constant of 9 at 1 kHz and a dissipation factor of 0.18 at 1 kHz.

Morphology and orientation of thin poly(3-hexylthiophene) (P3HT) films on differently silanized silicon oxide

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Guido Scavia ◽  
William Porzio ◽  
Silvia Destri ◽  
Alberto Giacometti Schieroni ◽  
Fabio Bertini
Keyword(s):  
Annealing Temperature ◽  
Silicon Oxide ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Thin Layers ◽  
X Ray Diffraction ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Xrd Techniques

AbstractThe morphology and structure of the overlying poly(3-hexylthiophene) (P3HT) layer onto differently silanized silicon oxide has been studied by Atomic Force Microscopy (AFM) and X-Ray Diffraction (XRD) techniques. By increasing the silanizer alkyl chain length, the layer morphology evolves from a filament like to globular needle like as a consequence of the different SAM organization, while the P3HT conformation remains edge-on. For each case the effect of the annealing temperature has been studied. For all the cases a particular attention has been paid to the first thin layers close to the interface P3HT/SiOx. The effect of a polar substituent and presence of aromatic ring has been also studied.

scholarly journals A study of nickel and cobalt silicides formed in the Ni/Co/Si(1 0 0) system by thermal annealing

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
C. Sedrati ◽  
A. Bouabellou ◽  
A. Kabir ◽  
R. Haddad ◽  
M. Boudissa ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Sheet Resistance ◽  
Annealing Temperature ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Sheet Resistance Measurement ◽  
Cobalt Silicides

AbstractIn this work, the Ni/Co/Si system was annealed at temperatures ranging from 300 °C to 800 °C. The samples were characterized by means of X-ray diffraction (XRD), Raman spectroscopy, Rutherford backscattering spectroscopy (RBS), atomic force microscopy (AFM) and sheet resistance measurement. The XRD and Raman spectroscopy results showed that the formation of nickel and cobalt silicides (CoSi, Co2Si, Ni2Si, NiSi, NiSi2, CoSi2) is an annealing temperature dependent diffusion process. The diffusion phenomenon was evidenced by RBS. The low values of the sheet resistance which were correlated with the films surface roughness were attributed to the formation of both CoSi and NiSi phases.

scholarly journals Investigation of WO3 Electrodeposition Leading to Nanostructured Thin Films

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1493
Author(s):  
G. Mineo ◽  
F. Ruffino ◽  
S. Mirabella ◽  
E. Bruno
Keyword(s):  
Energy Gap ◽  
Rutherford Backscattering Spectrometry ◽  
Low Cost ◽  
Tungstic Acid ◽  
X Ray Diffraction ◽  
Cathodic Current ◽  
Force Microscopy ◽  
Atomic Force ◽  
Gap Measurement ◽  
Instantaneous Nucleation

Nanostructured WO3 represents a promising material for electrochromic and sensing devices. In this scenario, electrodeposition is a promising low-cost approach for careful production. The electrodeposition of tungsten oxide film from a peroxo-tungstic-acid (PTA) solution is investigated. WO3 is synthetized onto Indium doped Tin Oxide (ITO) substrates, in a variety of shapes, from a fragmentary, thin layer up to a thick continuous film. Samples were investigated by scanning electron (SEM) and atomic force microscopy (AFM), Rutherford backscattering spectrometry (RBS), X-ray Diffraction analysis (XRD), energy gap measurement. Electrodeposition current curves are compared with characterization results to model the growth process. Early stages of electrodeposition are characterized by a transient cathodic current revealing an instantaneous nucleation followed by a diffusion limited process. A quantitative analysis of W deposition rate and current at working electrode validates a microscopic model for WO3 electrodeposition driving the process towards nanostructured versus continuous WO3 film.

Structural and Optical Properties of Nanophotonic LiNbO3 under Stirrer Time Effect

2018 ◽  
Vol 39 (3) ◽  
pp. 297-306 ◽  
Author(s):  
Makram A. Fakhri ◽  
Y. Al-Douri ◽  
A. Bouhemadou ◽  
M. Ameri
Keyword(s):  
Optical Waveguides ◽  
Time Effect ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Optical Dielectric Constant ◽  
Optical Dielectric ◽  
Uv Visible

Abstract Lithium niobate (LiNbO3) nanostructures are synthesized on n-silicon substrate by spin coating technique with stirrer times; 8 h, 24 h and 48 h. LiNbO3 is characterized and analyzed by Scanning Electron Microscope (SEM), Atomic Force Microscopy (AFM), X-ray diffraction (XRD) and UV-visible and Photoluminescence (PL). The measurements show that as stirrer time increases, the structures start to crystallize to become more regular distribution, which helps to apply in optical waveguides. In addition, the calculated refractive index and optical dielectric constant are in agreement with experimental data.

Investigation of ZnFe2O4 Nanoparticles Prepared by High Energy Milling

2009 ◽  
Author(s):  
S. S. Srinivasan ◽  
N. Kislov ◽  
Yu. Emirov ◽  
D. Y. Goswami ◽  
E. K. Stefanakos
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Energy Gap ◽  
Blue Shift ◽  
High Energy ◽  
X Ray Diffraction ◽  
Force Microscopy ◽  
Atomic Force ◽  
Coefficient Estimation ◽  
Transmission Electron

Nanoparticles of Zinc Ferrite (ZnFe2O4) prepared by both wet- and dry- high-energy ball milling (HEBM), have been investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), atomic force microscopy (AFM), surface area and pore size distribution (BET) and wavelength-dependent diffuse reflectance and scattering turned into absorption coefficient estimation using the Kubelka-Munk theory. It was found that after 72 hours of HEBM, the particle size was decreased from 220 nm for the initial material to 16.5 nm and 9.4 nm for the wet- and dry-milled samples, respectively. The optical absorption analysis revealed that the energy gap is increased (blue shift) by 0.45 eV for wet-milled and decreased (“anomalous” red shift) by 0.15 eV for dry-milled samples of ZnFe2O4 as the particle size decreased.

scholarly journals Annealing Effects on the Some Optical Properties of Fe2O3 Thin Films Doped by NiO

2016 ◽  
Vol 8 ◽  
pp. 44-50 ◽  
Author(s):  
Nadir Fadhil Habubi ◽  
Sami Salman Chiad ◽  
Khalid Haneen Abass ◽  
Mahmood Muwafaq Abood
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Nickel Oxide ◽  
Spray Pyrolysis ◽  
Glass Substrate ◽  
Annealing Temperature ◽  
Energy Gap ◽  
Spray Pyrolysis Technique ◽  
Annealing Effects ◽  
Uv Visible

Nickel oxide doped Fe2O3thin films have been prepared by spray pyrolysis technique on glass substrate. The initial solution was including a 0.1 M/L for both NiCl2and FeCl3diluted with redistilled water and a few drops of HCl. The effect of annealing temperature on optical properties was studied, using UV-Visible spectrophotometer to determine absorption spectra at a thickness of 400 nm. The reflectance increased with increasing annealing temperature, such as α, k, and n.While the transmittance decreases with increasing annealing temperature and the energy gap decreased from 2.68 eV before annealing to 2.70 eV after 500°C annealing temperature.

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