Microstructure and Optical Properties of Au–Y2O3-stabilized ZrO2 Nanocomposite Films

2005 ◽  
Vol 20 (9) ◽  
pp. 2516-2522 ◽  
Author(s):  
George Sirinakis ◽  
Rezina Siddique ◽  
Christos Monokroussos ◽  
Michael A. Carpenter ◽  
Alain E. Kaloyeros
Keyword(s):  
Optical Properties ◽  
Au Nanoparticles ◽  
Annealing Temperature ◽  
Rutherford Backscattering Spectrometry ◽  
Nanocomposite Films ◽  
Au Nanoparticle ◽  
X Ray Diffraction ◽  
Working Pressure ◽  
Optical Absorption Band ◽  
Size Dependent

Nanocomposite films consisting of gold nanoparticles embedded in an yttria stabilized zirconia (YSZ) matrix were synthesized at room temperature by radio-frequency co-sputtering from YSZ and Au targets at a 5 mTorr working pressure. The films were subsequently annealed for 2 h in 1 atm argon, with the annealing temperature varied from 600 to 1000 °C in steps of 100 °C. The composition, microstructure, and optical properties of the films were characterized as a function of annealing temperature by Rutherford backscattering spectrometry, scanning electron microscopy, Auger electron spectroscopy, x-ray diffraction, and absorption spectroscopy. An optical absorption band due to the surface plasmon resonance (SPR) of the Au nanoparticles was observed around a wavelength of 600 nm. Furthermore, the SPR band full width at half-maximum exhibited an inverse linear dependence on the radius of the Au nanoparticle, with a slope parameter A = 0.18, indicating a weak interaction between the YSZ matrix and the Au nanoparticles. The experimentally observed SPR dependence on nanoparticle size is discussed within the context of the Mie theory and its size-dependent optical constants.

scholarly journals The Effect of Working Gases Mixing Ratios on the Synthesis and Characteristics of TiO2/SiO2 Nanocomposite via Closed-Field unbalanced DC Magnetron Co-Sputtering Technique

2021 ◽  
Vol 2114 (1) ◽  
pp. 012060
Author(s):  
N. H. Mutesher
Keyword(s):  
Optical Properties ◽  
Nanocomposite Films ◽  
Closed Field ◽  
Mixing Ratio ◽  
X Ray Diffraction ◽  
Energy Band Gap ◽  
Structural And Optical Properties ◽  
Mixing Ratios ◽  
Deposition Parameters ◽  
Nanocomposite Thin Films

Abstract The objective of this research is to study the influence of deposition parameters such as gases mixing ratio O2/Ar on the structural and optical properties of the TiO2/SiO2 nanocomposite films synthesized using closed field unbalanced dc magnetron co-sputtering technique. The nanocomposite thin films were characterized using x-ray diffraction (XRD) to determine the phase structure, and Fourier transform infrared (FTIR) spectroscopy to investigate Si-O-Si, Ti-O and Si–O–Ti. functional groups. The UV-VIS. absorption spectra of the synthesized films reveal that the indirect energy band gap was found to be 2.75 eV. The mixing ratio of Oxygen and Argon (O2/Ar) gases has a pronounced controlling effect on the structural and optical properties of such nanocomposite.

Size dependent nonlinear optical properties of spin coated zinc oxide-polystyrene nanocomposite films

2012 ◽  
Vol 285 (24) ◽  
pp. 5433-5439 ◽  
Author(s):  
Pullarkat P. Jeeju ◽  
S. Jayalekshmi ◽  
K. Chandrasekharan ◽  
P. Sudheesh
Keyword(s):  
Zinc Oxide ◽  
Optical Properties ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Nanocomposite Films ◽  
Size Dependent

Size-dependent optical properties of transparent, spin-coated polystyrene/ZnO nanocomposite films

2011 ◽  
Vol 60 (8) ◽  
pp. 1263-1268 ◽  
Author(s):  
Pullarkat P Jeeju ◽  
Augustine M Sajimol ◽  
Vallath G Sreevalsa ◽  
Sreekanth J Varma ◽  
S Jayalekshmi
Keyword(s):  
Optical Properties ◽  
Nanocomposite Films ◽  
Size Dependent

scholarly journals Photoluminescence Spectroscopy and Rutherford Backscattering Channeling Evaluation of Various Capping Techniques for Rapid Thermal Annealing of Ion-Implanted ZnSe

1994 ◽  
Vol 340 ◽  
Author(s):  
E.L. Allen ◽  
F.X. Zach ◽  
K.M. Yu ◽  
E.D. Bourret
Keyword(s):  
Optical Properties ◽  
Point Defects ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Rutherford Backscattering Spectrometry ◽  
Liquid Nitrogen Temperature ◽  
Rutherford Backscattering ◽  
Photoluminescence Spectroscopy ◽  
Photoluminescence Spectra ◽  
Ion Implanted

ABSTRACTWe report on the effectiveness of proximity caps and PECVD Si3N4 caps during annealing of implanted ZnSe films. OMVPE ZnSe films were grown using diisopropylselenide (DIPSe) and diethylzinc (DEZn) precursors, then ion-implanted with 1 × 1014 cm−2 N (33 keV) or Ne (45 keV) at room temperature and liquid nitrogen temperature, and rapid thermal annealed at temperatures between 200°C and 850°C. Rutherford backscattering spectrometry in the channeling orientation was used to investigate damage recovery, and photoluminescence spectroscopy was used to investigate crystal quality and the formation of point defects. Low temperature implants were found to have better luminescence properties than room temperature implants, and results show that annealing time and temperature may be more important than capping material in determining the optical properties. The effects of various caps, implant and annealing temperature are discussed in terms of their effect on the photoluminescence spectra.

Plasmon Enhanced Emission of Perovskite Quantum Dot Films

MRS Advances ◽  
2018 ◽  
Vol 3 (14) ◽  
pp. 733-739 ◽  
Author(s):  
Seyma Dadı ◽  
Yemliha Altıntas ◽  
Emre Beskazak ◽  
Evren Mutlugun
Keyword(s):  
Quantum Dot ◽  
Au Nanoparticles ◽  
Au Nanoparticle ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Transmission Electron ◽  
Coating Method ◽  
Photoluminescence Enhancement ◽  
Time Resolved Photoluminescence

ABSTRACTWe propose and demonstrate the photoluminescence enhancement of CsPbBr3 perovskite quantum dot films in the presence of Au nanoparticles. Embedded into a polymer matrix, Au nanoparticle- quantum dot film assemble prepared by an easy spin coating method enabled the photoluminescence enhancement of perovskite quantum dot films up to 78%. The properties of the synthesized perovskite QDs and gold nanoparticles have been analysed using high resolution transmission electron microscopy, X-ray diffraction, energy dispersive X- ray spectroscopy, UV-Vis absorption spectrophotometer, steady state and time-resolved photoluminescence spectrometer.

Optical Properties of CulnSi Nanocomposite Thin Film Deposited by Magnetron Co-Sputtering

2011 ◽  
Vol 403-408 ◽  
pp. 1089-1093
Author(s):  
Jian Sheng Xie ◽  
Jin Hua Li ◽  
Luan Ping
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Optical Absorption ◽  
Nanocomposite Films ◽  
Nanocomposite Thin Film ◽  
X Ray Diffraction ◽  
X Ray ◽  
Double Beam ◽  
Absorption Studies ◽  
Xrd Studies

Thin CuInSi nanocomposite films were prepared by magnetron co-sputtering. The structures of CuInSi nanocomposite films were detected by X-ray diffraction(XRD); XRD studies of the annealed films indicate the presence of CuInSi, the main crystal phase peak is at 2θ=42.400°. The transmittance (T) spectra of the films were measured by Shimadzu UV-2450 double beam spectrophotometer. The band gap has been estimated from the optical absorption studies and found to be about 1.40 eV, but changes with purity of CuInSi.

scholarly journals Effect of sample thickness on the structural and optical properties of Polyvinyl Chloride/Zinc Oxide Nanocomposite Films for photocatalysis application

2021 ◽  
Author(s):  
aimane guedri ◽  
Mourad ZAABAT ◽  
Boubekeur BOUDINE ◽  
Abdelkader HAFDALLAH
Keyword(s):  
Zinc Oxide ◽  
Optical Properties ◽  
Polyvinyl Chloride ◽  
Spin Coating ◽  
Visible Region ◽  
Nanocomposite Films ◽  
Structural Defects ◽  
X Ray Diffraction ◽  
Lower Efficiency ◽  
X Ray

Abstract Considered Technique spin coating of the most important techniques used to prepare thin films because it is easy to use and inexpensive since it is closely dependent on the number of layers deposited. This work aims to study the effect of samples thickness for nanocomposites of polyvinyl chloride doped with zinc oxide nanoparticles on the structural, optical properties, and photocatalytic activities. Nanocomposite films of polyvinyl chloride (PVC) - zinc oxide (ZnO) with a different number of the deposited layers (15, 20, 25, and 30 layers) were synthesized by a sol-gel method (spin coating) using tetrahydrofuran as a solvent, and investigated by various techniques. X-ray diffraction measurements indicated in the case of 15, 20, and 25 layers do not clearly show the presence of diffraction peaks. On the other hand, in the case of 30 layers, the presence of several peaks is observed, which testify to the presence of ZnO crystallites of wurtzite structure in PVC films. The size of the crystallites is almost equal to 32 nm depending on the working conditions. Raman and infrared spectra confirmed the result of X-ray diffraction on the incorporation of ZnO crystallites in the films produced by showing peaks corresponding to the modes of vibration of the crystal lattice of the ZnO doping semiconductor. Optical transmittance spectra have shown that The layers obtained have an optical transmission varying from 75 to 86% in the visible region of the spectrum. The values of the band gap energies, determined from the transmission spectra for the films deposited on glass, vary between 3.45 and 3.94 eV. The Photoluminescence spectra of ZnO/PVC nanocomposites studied revealed a strong ultraviolet and green luminescence, attributed to structural defects in the zinc oxide. The photocatalytic reaction has been shown using MB in the UV irradiation action of films stacked in an MB solution. The result showed that the 30-layer (PVC / ZnO) sample gave an efficiency to remove MB of 79% at 60 min, Similar to other samples which gave a lower efficiency.

scholarly journals Influence of Laser Energy and Annealing on Structural and Optical Properties of CdS Films Prepared by Laser Induced Plasma

2020 ◽  
pp. 1307-1312
Author(s):  
Wadaa S. Hussein ◽  
Ala' Fadhil Ahmed ◽  
Kadhim A. Aadim
Keyword(s):  
Optical Properties ◽  
Annealing Temperature ◽  
Laser Energy ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Laser Induced Plasma ◽  
Visible Spectra ◽  
Uv Visible ◽  
Diffraction Patterns

The current study was achieved on the effects of laser energy and annealing temperature on x-ray structural and optical properties, such as the UV-Visible spectra of cadmium sulfide (CdS). The films were prepared using pules laser deposition technique (PLD) under vacuum at a pressure of 2.5×10-2 mbar with different laser energies (500-800 mJ) and annealing at a temperature of 473K. X-ray diffraction patterns and intensity curves for the CdS showed that the formation of CdS multi-crystallization films at all laser energies. The optical properties of the films were studied and the variables affecting them were investigated in relation to laser energy and changes in temperature.

Effect of Annealing Temperature on Structure and Optical Properties of Ta2O5 Thin Films Prepared by DC Magnetron Sputtering

2013 ◽  
Vol 770 ◽  
pp. 149-152 ◽  
Author(s):  
T. Plirdpring ◽  
M. Horprathum ◽  
C. Chananonnawathorn ◽  
P. Eiamchai ◽  
A. Harnwunggmoung ◽  
...  
Keyword(s):  
Optical Properties ◽  
Magnetron Sputtering ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Annealing Treatment ◽  
Orthorhombic Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dc Reactive Magnetron Sputtering ◽  
Deposited Films

Tantalum oxide (Ta2O5) films at 400 nm thickness were prepared at room temperature by DC reactive magnetron sputtering. The effect of annealing temperature on film crystallinity, microstructure and optical properties were investigated. In order to indentify the crystalline structure and film morphology, X-ray diffraction (XRD) and field-emission scanning electron microscope (FE-SEM) measurements were performance. The optical properties were determined by UV-Vis spectrophotometer and spectroscopic ellipsometry (SE). The result showed that, with the annealing treatment at high temperature (700-900°C), the as-deposited films were crystallized to orthorhombic phase of tantalum pentaoxide (β-Ta2O5). In addition, the transmittance spectrum percentage indicated 87%, which corresponded to the obtained optical characteristic. The refractive index varied at 550 nm from 2.17 to 2.21 with increased of the annealing temperature.

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