scholarly journals The Influence of Temperature on the Formation of Cubic Structured CdO Nanoparticles and Their Thin Films from Bis(2-hydroxy-1-naphthaldehydato)cadmium(II) Complex via Thermal Decomposition Technique

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Thokozani Xaba ◽  
Makwena J. Moloto ◽  
Mohammad A. Malik ◽  
Nosipho Moloto
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Thermal Decomposition ◽  
Metal Oxide Nanoparticles ◽  
Cadmium Oxide ◽  
Oxide Nanoparticles ◽  
Glass Substrates ◽  
Vis Spectroscopy ◽  
Cdo Nanoparticles ◽  
Cdo Thin Films

Recently, researchers have developed a great interest in the synthesis of metal oxide nanoparticles due to their potential applications in various fields of science and industry, especially in catalysis, due to their high activity. Bis(2-hydroxy-1-naphthaldehydato)cadmium(II) complexes were prepared and used as precursors for the synthesis of cadmium oxide nanoparticles via thermal decomposition method using HDA as a stabilizing agent. The prepared complexes were also used as single source precursors to prepare CdO thin films onto the glass substrates by spin coating and were annealed at 250, 300, and 350°C, respectively. The precursors were characterized by Fourier transform infrared (FTIR) spectroscopy, elemental analysis, nuclear magnetic resonance (NMR), and thermogravimetric analysis (TGA). The synthesized CdO nanoparticles and CdO thin films were characterized by ultraviolet-visible (UV-vis) spectroscopy, photoluminescence (PL), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and atomic force microscopy (AFM).

Enhancing resistive-type hydrogen gas sensing properties of cadmium oxide thin films by copper doping

2018 ◽  
Vol 42 (2) ◽  
pp. 1457-1466 ◽  
Author(s):  
K. Sankarasubramanian ◽  
P. Soundarrajan ◽  
T. Logu ◽  
K. Sethuraman ◽  
K. Ramamurthi
Keyword(s):  
Thin Films ◽  
Gas Sensing ◽  
Spray Pyrolysis Technique ◽  
Cadmium Oxide ◽  
Hydrogen Gas ◽  
Chemical Spray Pyrolysis ◽  
Glass Substrates ◽  
Gas Sensing Properties ◽  
Amorphous Glass ◽  
Cdo Thin Films

The pure and Cu-doped CdO thin films with various doping concentrations (0.5 to 2 wt%) were deposited on amorphous glass substrates by a chemical spray pyrolysis technique for hydrogen gas sensor application.

scholarly journals EFFECT OF THICKNESS ON THE STRUCTURE AND OPTICAL PROPERTIES OF LASER-INDUCED PLASMA CDO THIN FILMS

2021 ◽  
Vol 03 (03) ◽  
pp. 41-50
Author(s):  
Hiyam Ch. MAJED
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Energy Gap ◽  
Plasma Deposition ◽  
Cadmium Oxide ◽  
Laser Wavelength ◽  
Dielectric Constants ◽  
Laser Induced Plasma ◽  
Glass Substrates ◽  
Cdo Thin Films

Thin films of cadmium oxide (CdO) deposited on glass substrates using Nd-YAG laser wavelength (alpha= 532 nm) and period time (10ns) via laser-induced plasma deposition technique (PLD). The structural properties of these films have been described as a change in thickness (200 , 400 ,and 1000) nm) at substrate temperature of (400 ° C) and energy flounce of (0.4 J / cm2). The X-ray diffraction results show that he mean size of crystallite measured using Scherer formula to adjust the thickness of 200 nm, 400 nm and 1000 nm of CdO thin films is 47 nm, 64 nm and 78 nm respectively .Also the optical properties which included transmittance, absorbance , energy gap and optical constant such as the Refractive index, extinction coefficient real and imaginary parts of dielectric constants were determined .

Antibacterial Activity of Photocatalytic Metal Oxide Thin Films Deposited by Layer-by-Layer Self-Assembly

2021 ◽  
Vol 21 (5) ◽  
pp. 2855-2863
Author(s):  
Pedro J. Rivero ◽  
Joseba Esparza ◽  
Ricardo San Martín ◽  
Ana I. Vitas ◽  
Gonzalo G. Fuentes ◽  
...  
Keyword(s):  
Thin Films ◽  
Antibacterial Activity ◽  
Metal Oxide ◽  
Self Assembly ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Layer By Layer ◽  
Water Contact ◽  
Vis Spectroscopy ◽  
Polymeric Chains

This paper reports the use of the Layer-by-Layer self-assembly (LbL) as an efficient technique for the fabrication of thin-films with antibacterial activity. The LbL coatings are composed of a positive polyelectrolyte such as Poly(allylamine hydrochloride) (PAH) and an anionic polyelectrolyte such as Poly(sodium 4-styrene sulfonate) solution (PSS). In addition, these polyelectrolytes can be also used as an adequate encapsulating agent of specific metal oxide precursors such as titanium dioxide (TiO2) and iron oxide (Fe2O3) nanoparticles, making possible the fabrication of hybrid thin films composed of organic polymeric chains related to the polyelectrolytes and inorganic structure associated to the metal oxide nanoparticles. Four different LbL coatings have been fabricated and a comparative study about the resultant topographical, optical and wettability properties is presented by using light interferometry, atomic force microscopy (AFM), UV-Vis spectroscopy and water contact angle (WCA) measurements. In addition, X-ray fluorescence (XRF) has been also employed in order to corroborate the presence of metal oxide precursors inside the polymeric chains of the polyelectrolytes. Finally, the antibacterial tests have demonstrated that LbL coatings composed of metal oxide nanoparticles produce an enhancement in the efficacy and antibacterial activity.

scholarly journals Preparation of CuCrO2 Anisotropic Dela-fossite-Type Thin Film by Electrospinning on Glass Substrates

Ceramics ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 364-377
Author(s):  
Chung-Lun Yu ◽  
Chia-Hsuan Weng ◽  
Rong-Jun Huang ◽  
Subramanian Sakthinathan ◽  
Te-Wei Chiu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Rotation Speed ◽  
Optical Transmittance ◽  
Structural Formation ◽  
X Ray ◽  
Glass Substrates ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Electrospinning Method

Anisotropic CuCrO2 thin films were successfully prepared on glass substrate by the electrospinning method followed by annealing at 600 °C. The directionality of the nanowires increased with increases in rotation speed. In addition, the structural formation and optoelectronic behavior of the CuCrO2 thin films have been studied by X-ray powder diffraction studies, transmission electron microscopy, field emission scanning electron microscopy, and UV-vis spectroscopy. The X-ray diffraction studies revealed a delafossite properties of the CuCrO2. The electrical conductivity in the parallel and vertical directions of the films produced at 2000–3000 rpm differed by two to three orders of magnitude. The optical transmittance properties of the CuCrO2 thin films were improved by increasing the rotation speed.

scholarly journals Effect of doping concentration on the structural, morphological, optical and electrical properties of Mn-doped CdO thin films

2015 ◽  
Vol 33 (4) ◽  
pp. 774-781 ◽  
Author(s):  
N. Manjula ◽  
M. Pugalenthi ◽  
V.S. Nagarethinam ◽  
K. Usharani ◽  
A.R. Balu
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Doping Concentration ◽  
Cadmium Oxide ◽  
Optical And Electrical Properties ◽  
Cubic Crystal ◽  
Mn Doping ◽  
Glass Substrates ◽  
Cdo Thin Films ◽  
Mn Doped

AbstractThin films of manganese-doped cadmium oxide (CdO:Mn) with different Mn-doping levels (0, 1, 2, 3 and 4 at.%) were deposited on glass substrates by employing an inexpensive, simplified spray technique using a perfume atomizer at 375 °C. The influence of Mn incorporation on the structural, morphological, optical and electrical properties of CdO films has been studied. All the films exhibit cubic crystal structure with a (1 1 1) preferential orientation. Mn-doping causes a slight shift of the (1 1 1) diffraction peak towards higher angle. The crystallite size of the films is found to decrease from 34.63 nm to 17.68 nm with an increase in Mn doping concentration. The CdO:Mn film coated with 1 at.% Mn exhibit a high transparency of nearly 90 % which decreases for higher doping concentration. The optical band gap decreases with an increase in Mn doping concentration. All the films have electrical resistivity of the order of 10−4 Ω·cm.

scholarly journals Characterisation of Zinc Oxide and Cadmium Oxide Nanostructures Obtained from the Low Temperature Thermal Decomposition of Inorganic Precursors

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
K. Kalpanadevi ◽  
C. R. Sinduja ◽  
R. Manimekalai
Keyword(s):  
Electron Microscopy ◽  
Thermal Decomposition ◽  
Zinc Oxide ◽  
Low Temperature ◽  
Cadmium Oxide ◽  
Oxide Nanoparticles ◽  
Average Particle ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Infrared Spectral

Low temperature syntheses of zinc oxide and cadmium oxide nanoparticles are reported in this paper. The inorganic precursor complexes were prepared and characterised by hydrazine and metal analyses, infrared spectral analysis, and thermal analysis. Using appropriate annealing conditions, zinc oxide and cadmium oxide nanoparticles of average particle sizes around 13 nm and 30 nm were synthesised from the precursors by a simple thermal decomposition route. The synthesised nanoparticles were characterised for their size and structure using X-Ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), and scanning electron microscopy (SEM) techniques.

scholarly journals Revealing a room temperature ferromagnetism in cadmium oxide nanoparticles: an experimental and first-principles study

RSC Advances ◽  
2015 ◽  
Vol 5 (42) ◽  
pp. 33233-33238 ◽  
Author(s):  
Mohamed Bououdina ◽  
Aqeel Aziz Dakhel ◽  
Mohammad El-Hilo ◽  
Dalaver H. Anjum ◽  
Mohammed Benali Kanoun ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
First Principles ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Cadmium Oxide ◽  
Oxide Nanoparticles ◽  
First Principles Study ◽  
Oxygen Defects ◽  
Cdo Nanoparticles

CdO nanoparticles obtained from a thermal decomposition, show a room temperature ferromagnetism due to the cadmium and oxygen defects.

scholarly journals Preparation of CuCrO2 anisotropic delafossite-type thin film by electrospinning on glass substrates

2021 ◽  
Author(s):  
Chia-Hsuan Weng ◽  
Rong-JUN Huang ◽  
Subramanian Sakthinathan ◽  
Te-Wei Chiu ◽  
Chaofang Dong
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Rotation Speed ◽  
Hall Effect Measurement ◽  
Optical Transmittance ◽  
Structural Formation ◽  
X Ray ◽  
Glass Substrates ◽  
Transmission Electron ◽  
Vis Spectroscopy

Abstract Anisotropic CuCrO2 thin films were successfully prepared on glass substrate by the electrospinning method followed by annealing at 600°C. The directionality of the nanowires increased with increases in rotation speed. In addition, the structural formation and optoelectronic behavior of the CuCrO2 thin films have been studied by X-ray powder diffraction studies, transmission electron microscopy, field emission scanning electron microscopy, Hall effect measurement and UV-vis spectroscopy. The X-ray diffraction studies revealed a delafossite properties of the CuCrO2. The electrical conductivity in the parallel and vertical directions of the films produced at 2000–3000 rpm differed by two to three orders of magnitude. The optical transmittance properties of the CuCrO2 thin films was improved by increasing the rotation speed.

scholarly journals Phytosynthetic Fabrication of Lanthanum Ion-Doped Nickel Oxide Nanoparticles Using Sesbania grandiflora Leaf Extract and Their Anti-Microbial Properties

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 124
Author(s):  
Srihasam Saiganesh ◽  
Thyagarajan Krishnan ◽  
Golla Narasimha ◽  
Hesham S. Almoallim ◽  
Sulaiman Ali Alhari ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Optical Properties ◽  
Rare Earth ◽  
Nickel Oxide ◽  
Photoelectron Spectroscopy ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Nio Nanoparticles ◽  
X Ray ◽  
Sesbania Grandiflora

Over the past few years, the photogenic fabrication of metal oxide nanoparticles has attracted considerable attention, owing to the simple, eco-friendly, and non-toxic procedure. Herein, we fabricated NiO nanoparticles and altered their optical properties by doping with a rare earth element (lanthanum) using Sesbania grandiflora broth for antibacterial applications. The doping of lanthanum with NiO was systematically studied. The optical properties of the prepared nanomaterials were investigated through UV-Vis diffuse reflectance spectra (UV-DRS) analysis, and their structures were studied using X-ray diffraction analysis. The morphological features of the prepared nanomaterials were examined by scanning electron microscopy and transmission electron microscopy, their elemental structure was analyzed by energy-dispersive X-ray spectral analysis, and their oxidation states were analyzed by X-ray photoelectron spectroscopy. Furthermore, the antibacterial action of NiO and La-doped NiO nanoparticles was studied by the zone of inhibition method for Gram-negative and Gram-positive bacterial strains such as Escherichia coli and Bacillus sublitis. It was evident from the obtained results that the optimized compound NiOLa-04 performed better than the other prepared compounds. To the best of our knowledge, this is the first report on the phytosynthetic fabrication of rare-earth ion Lanthanum (La3+)-doped Nickel Oxide (NiO) nanoparticles and their anti-microbial studies.

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