Optical Properties | Scientific.Net

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class="pagination-container"><ul class="pagination"><li class="active"><span>1</span></li><li><a href="/paper-keyword/optical-properties/2">2</a></li><li><a href="/paper-keyword/optical-properties/3">3</a></li><li><a href="/paper-keyword/optical-properties/4">4</a></li><li><a href="/paper-keyword/optical-properties/5">5</a></li><li class="PagedList-ellipses"><a class="PagedList-skipToNext" href="/paper-keyword/optical-properties/6" rel="next">…</a></li><li class="PagedList-skipToNext"><a href="/paper-keyword/optical-properties/2" rel="next">></a></li><li class="PagedList-skipToLast"><a href="/paper-keyword/optical-properties/20">>></a></li></ul></div> </div> <div class="block-volume-title normal-text-gray"> <p> Paper Title<span>Page</span> </p> </div> <div class="item-block"> <div class="item-link"> <a href="/DDF.437.21">Luminescence Properties of Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> Phosphors Powder with Solid State Method</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Ya Li Zhu, Xu Chao Song, Nan Ye Pan, Chen Hua Huang, Hexig Alata, Altan Bolag, Hascholu Oimod, Jun Ning, Bing Qin Zhou, Ojild Tegus </div> </div> <div id="abstractTextBlock608798" class="volume-info volume-info-text volume-info-description"> Abstract: The low-temperature solid-state method is utilized to prepare Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> phosphors powder by using the cesium iodide (CsI) and cuprous iodide (CuI) as the raw materials. The phase structures of samples were investigated by using X-ray spectrum and steady-state fluorescence spectrometer. The experimental results show that all of samples were crystallized in the orthorhombic structure with pnma space group at the annealing temperature of 100-400°C. Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> phosphors exhibits a strong blue photoluminescence emission with peak at 440nm under excitation at 310nm. With the increase of the annealing temperature in the range of 100-400°C, the photoluminescence quantum yield (PLQY) of Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> powder achieved the 79.95%. It is revealed that the prepared Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> powder phosphors potentially have the promising application in the blue light emitting materials. </div> <div> <a data-readmore="{ block: '#abstractTextBlock608798', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 21 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/SSP.358.109">Improvement of Reflectance Spectroscopy for Oxide Layers on 4H-SiC</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> <i class="inline-icon lock-open-red inline-icon-small" title="Open Access"></i> Authors: Julien Koerfer, Mathias Rommel, Alesa Fuchs, Oleg Rusch </div> </div> <div id="abstractTextBlock604829" class="volume-info volume-info-text volume-info-description"> Abstract: In this work, we investigate the use of reflectance spectroscopy as an accurate, fast, and non-destructive method for measuring the thickness of transparent layers, such as SiO<sub>2</sub>, with thicknesses below 200 nm for microelectronic applications. To this end, we fabricated different oxides and analyzed their reflectance spectra using reflectance spectroscopy. The results were compared to theoretical reflectance spectra to validate the method. We introduce key factors to ensure accurate measurement by modeling the reflectance spectra of thin oxide layers with thicknesses ≥ 15 nm on 4H-SiC using the transfer matrix method (TMM). </div> <div> <a data-readmore="{ block: '#abstractTextBlock604829', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 109 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/JBBBE.65.59">Preparation, Characterization and Optical Analysis of Chromium Doped 45S Bioactive Glass-Ceramic</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: İsmail Seçkin Çardaklı </div> </div> <div id="abstractTextBlock608949" class="volume-info volume-info-text volume-info-description"> Abstract: The 45S Bioactive glass-ceramic (BG) and Chromium (Cr)-doped BG materials were successfully produced in this study. XRD, FTIR, and ICP-MS techniques were used to characterize the prepared materials. The XRD testing showed that all samples contained pure BG. Increased Cr ion inclusion shifted the BG diffraction peaks to a lower value of 2 Theta and increased crystallinity. FTIR was used to detect Si-O, P-O, and Ca-O functional groups. Cr ions steadily decreased the Ca-vibration mode area. The ultraviolet-visible spectrophotometry was used to measure the optical characteristics of pure and Cr BG-doped materials. The Cr-doped BG was green in colour, whereas the lab-synthesized BG was white. Two additional bands formed at 433 and 615 nm when Cr ions were doped into the BG structure. These bands may be caused by <sup>4</sup>A<sub>2</sub> → <sup>4</sup>T<sub>1</sub> and <sup>4</sup>A<sub>2</sub> → <sup>4</sup>T<sub>2 </sub>electronic d-d transitions. The findings show that biomedical applications may exist for fluorescent probes manufactured from Cr-BG materials. </div> <div> <a data-readmore="{ block: '#abstractTextBlock608949', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 59 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/JNanoR.81.65">The Influence of Reaction Medium pH on the Structure, Optical, and Mechanical Properties of Nanosized Cu-Fe Ferrite Synthesized by the Sol-Gel Autocombustion Method</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Julia Mazurenko, Larysa Kaykan, A. K. Sijo, Mykola Moiseienko, Myroslav Kuzyshyn, Nataliia Ostapovych, Mariia Moklyak </div> </div> <div id="abstractTextBlock603552" class="volume-info volume-info-text volume-info-description"> Abstract: Nanoscale mixed ferrites with a spinel structure are highly versatile materials widely employed across diverse fields, including engineering, biomedicine, and ecology. This study explores the influence of pH on the structure, morphology, electrophysical, and mechanical properties of CuFe<sub>2</sub>O<sub>4</sub> spinel, synthesized using the sol-gel self-combustion method. The investigation reveals that the pH level significantly impacts the structure formation, even at the gel formation stage, thereby shaping the subsequent structure and properties of the synthesized ferrite. X-ray diffraction (XRD) analysis demonstrates that the dominant phase (>90%) corresponds to the cubic spinel phase with the chemical formula CuFe<sub>2</sub>O<sub>4</sub>, belonging to the Fd3m space group. Notably, the pH of the reaction medium exerts a profound influence on the distribution of iron and copper ions within the octahedral and tetrahedral sublattices of the spinel structure. This variation in cationic distribution manifests in notable changes in the synthesized ferrite's magnetic, mechanical, and degradation properties. Furthermore, the study delves into the impact of the synthesized CuFe<sub>2</sub>O<sub>4</sub> spinel as a photocatalyst for degrading organic dyes through the photo-Fenton process. It demonstrates that degradation efficiency is closely related to the ferrite's band gap width and particle size. This study aimed to determine how the pH of the reaction medium impacts the structure, morphology, optical, mechanical, and magnetic characteristics of the nanosized ferrites being synthesized. Furthermore, the synthesized materials were evaluated for their photocatalytic abilities in degrading organic dyes in water. The ferrite powders showcased remarkable dye degradation capabilities via the photo-Fenton process. Degradation efficiency largely hinged on the band gap width and the size of the particles. The most notable outcome was achieved with sample P1, which had particle sizes averaging 12.14 nm. By unraveling the complex relationship between pH, structure, and properties, this research enhances our understanding of the design and optimization of nanoscale mixed ferrites. </div> <div> <a data-readmore="{ block: '#abstractTextBlock603552', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 65 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/JNanoR.81.37">Effect of Deposition Time on the Properties of Cu<sub>x</sub>Zn<sub>y</sub>S Thin Films Synthesized by Ultrasonic Spray Pyrolysis</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Kenza Kamli, Zakaria Hadef, Ouarda Kamli, Baghdadi Chouial, Mohamed Salah Aida, Hani Hadjoudja, Samir Labiod </div> </div> <div id="abstractTextBlock601009" class="volume-info volume-info-text volume-info-description"> Abstract: Copper Zinc Sulfide Cu<sub>x</sub>Zn<sub>y</sub>S (CZS) thin films with different thicknesses were prepared by the ultrasonic spray pyrolysis method (USP). The influence of deposition time on the structural, morphological, and optical properties of the thin films has been investigated. XRD styles revealed the formation of ternary CZS films. Synchrotron X-ray diffraction measurements confirmed the presence of the two phases CuS and ZnS, which form the ternary compound CZS. Crystallite size increases from 75.29 nm to 105.46 nm as deposition time increases whereas the strain parameter decreases from 6.27*10<sup>-4</sup> to 3.28*10<sup>-4</sup>. The obtained SEM images show that CZS thin films have a dense and rough surface topography. Spectrometric analysis of the deposited films confirmed the alloy nature of the elaborated films, whereas the corresponding values of band gaps were in the range of 3.28 to 3.17 eV. Results show that increasing the deposition time enhances the optical properties. Furthermore, the electrical properties of CZS films are influenced by the deposition time and phase transition. Significant improvements on these properties were obtained when the thin film thickness increased: the resistivity decreased from 95.10 to 0.12 Ω cm the carrier centration increased from 4.03×10<sup>21</sup> to 14.07×10<sup>21</sup> cm<sup>−3</sup> and the mobility varied from 0.83 to 18.75 cm<sup>2</sup> V<sup>−1</sup> S<sup>−1</sup>. </div> <div> <a data-readmore="{ block: '#abstractTextBlock601009', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 37 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/KEM.971.151">Stability Evaluation of Nanofluids Suitable for Enhanced Oil Recovery</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Lengu Peter Tuok, Marwa F. El Kady, Tsuyoshi Yoshitake, Usama Nour Eldemerdash </div> </div> <div id="abstractTextBlock603148" class="volume-info volume-info-text volume-info-description"> Abstract: The evaluation of metal oxides nanoparticles stability in the base fluids has become a major aspect in enhanced oil recovery process in recent years. Physical and chemical properties of ZnO nanofluids have caught attention of many researchers because they are easily dispersed in the base fluids, better convective coefficient of heat transfer, and wider bandgap which make them remarkable nanofluids candidate compared to other metal oxides. In this study, the stability of nanofluid of zinc oxide nanoparticles was evaluated using different stability tests and analysis. However, ZnO nanoparticles were synthesized using sol-gel method and nanofluids of different concentrations were prepared. The prepared nanoparticles were characterized using various characterization techniques such as XRD, FTIR, TEM, and Zeta sizer. The stability of prepared nanofluids was investigated using sedimentation test, UV-vis spectrophotometer, and zeta analyzer. Based on physical investigation and UV-vis spectra observations, ZnO nanoparticles in base fluids have shown a good colloidal stability in addition to their high zeta potential values of-43.7 (mV) after seven days which makes it a successful potential candidate for enhanced oil recovery applications. </div> <div> <a data-readmore="{ block: '#abstractTextBlock603148', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 151 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/SSP.350.83">A Study on the Inclusion of Higher Dopant Proportion on ZrO<sub>2 </sub>Thin Film Deposited by Spray Pyrolysis Method</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: M. Jothibas, B. Arunkumar, T. Meganathan, P. Arivazhagan, P. Arunkumar </div> </div> <div id="abstractTextBlock599987" class="volume-info volume-info-text volume-info-description"> Abstract: In this present work, Pristine and 10 at.% of In-doped ZrO<sub>2</sub>thin films were deposited by spray pyrolysis technique at optimized substrate temperature [Ts=450°C]. The greater the proportion of Indium ion dopant, significantly influences the structural, optical, morphological, and electrical properties of deposit thin films. The deposited thin films were characterized with XRD, UV-Vis, PL, HR-TEM with EDAX, and I-V characterization Studies. The crystallinity of Zirconium dioxide thin film was improved and size of crystals were decreased by Indium ion substitution. Optical study revealed that the film's optical transmittance enhanced from 80.3 percent to 86.5% as a result of the dopant. The energy bandgap increased at 4.93eV - 4.57eV, systematically. HR-TEM studies show the homogeneous particle distribution and denser surface texture at 22nm and 19nm of average particle agglomerations. The study of PL emission shows an increase in intensity on the blue emission band with enriched crystalline quality. The conductivity of the ZrO<sub>2</sub> was higher affected by Indium ion may result in increased conductivity, with low resistivity property. </div> <div> <a data-readmore="{ block: '#abstractTextBlock599987', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 83 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/JNanoR.80.123">Investigating the Effects of Biaxial Strain on the Electronic, Optical and Thermoelectric Properties of the Puckered Si<sub>2</sub>SeTe Monolayer</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Hamza Rghioui, Adil Marjaoui, Mohamed Ait Tamerd, Mohamed Zanouni </div> </div> <div id="abstractTextBlock600325" class="volume-info volume-info-text volume-info-description"> Abstract: In this paper, we have investigated the electronic, optical and thermoelectric properties of the puckered Si<sub>2</sub>SeTe monolayer when subjected to various levels of biaxial strain ranging from −10% to +10%. The structural stability, as determined by the cohesive energy, shows that the puckered Si<sub>2</sub>SeTe structure is energetically stable. The results reveal that the unstrained Si<sub>2</sub>SeTe monolayer is an indirect band gap semiconductor with an energy gap of 0.5 eV, which can be effectively adjusted with biaxial strain. The semiconductor–metal phase transition occurs when the monolayer is compressed by −4% biaxial strain. Moreover, the optical properties, including the real ε<sub>1</sub>(ω) and imaginary ε<sub>2</sub>(ω) components of the dielectric function, extinction coefficient K(ω), reflectivity R(ω), refractive index n (ω), and absorption coefficient α (ω), were evaluated as a function of the energy of light and under biaxial strain. We discovered that the puckered Si<sub>2</sub>SeTe monolayer is capable of absorbing light in the visible region of 64.7×10<sup>4</sup> cm<sup>−1</sup>, 73.8×10<sup>4</sup> cm<sup>−1</sup> for equilibrium state and under the compression strain (−8%), respectively. Lastly, the influence of biaxial strain on thermoelectric properties such as electrical conductivity (σ/τ), electronic thermal conductivity (k<sub>e</sub>/τ), Seebeck coefficients, and electronic figure of merit (ZT<sub>e</sub>) was studied. The calculated electronic figure of merit ZT<sub>e</sub> presents an improvement in the p-type doping (μ<0) under the tensile biaxial strain. Taking into account the optical and thermoelectric properties, the puckered Si<sub>2</sub>SeTe monolayer is a promising material for use in optoelectronic devices and energy conversion technologies. </div> <div> <a data-readmore="{ block: '#abstractTextBlock600325', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 123 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/MSF.1095.21">Theoretical Investigation of Optoelectronics Properties of Titanium Dichalcogenides Materials TiX<sub>2</sub> (X=S, Se, Te) Using Quantum Espresso</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Ibtissam Guesmi, Mohammed Amine Bouammali, Siham Malki, Zakariae Darhi, Allal Challioui, Larbi El Farh </div> </div> <div id="abstractTextBlock597261" class="volume-info volume-info-text volume-info-description"> Abstract: In this work, we present the results of the calculation of the electronic and optical properties of titanium dichalcogenide materials TiX<sub>2</sub> (X=S, Se, Te). These calculations were performed using the QUANTUM-ESPRESSO package, based on the density functional theory and the pseudopotential technique. The results obtained showed that TiS<sub>2</sub> is a semi-metallic compound, this character is due to a very small overlap between the density of states p-orbitals of S and d-orbitals of the Ti atom in the vicinity of the Fermi level. While TiSe<sub>2</sub> and TiTe<sub>2 </sub>indicate the metallic characters. At the Fermi level, the total density of states is 0.77 states/eV and 1.13 states/eV for both compounds respectively. On the other hand, the optical properties of these materials such as the real and imaginary parts of dielectric function ε<sub>1</sub> and ε<sub>2</sub>, respectively, the refractive index, the absorption, the reflectivity, and the loss function were investigated based on Kramers-Kroning relations in the energy range of 0 to 20 eV. In the infrared region, the reflectivity spectrum R(ω) is close to 100% for TiX<sub>2</sub> (X= S, Se, Te), suggesting their potential application as a good coating material. </div> <div> <a data-readmore="{ block: '#abstractTextBlock597261', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 21 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/MSF.1093.21">Electronic Structure of the Non-Stoichiometric <i>L</i>2<sub>1</sub>-Type Mn<sub>1.75</sub>Co<sub>1.25</sub>Al Heusler Alloy</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Alexey V. Lukoyanov, Elena I. Shreder, Vyacheslav V. Marchenkov </div> </div> <div id="abstractTextBlock597062" class="volume-info volume-info-text volume-info-description"> Abstract: Theoretical<i> ab initio </i>calculations of the electronic structure were performed for the non-stoichiometric Mn<sub>1.75</sub>Co<sub>1.25</sub>Al Heusler alloy and compared with the electronic structure of the stoichiometric Mn<sub>2</sub>CoAl full Heusler alloy. Both compounds are assumed to have the <i>L</i>2<sub>1</sub>-type crystal structure in the calculations, the non-stoichiometry is taken into account as a substitution of a Mn atom in a supercell. The calculation for the non-stoichiometric composition of Mn<sub>1.75</sub>Co<sub>1.25</sub>Al showed that taking non-stoichiometry into account leads to a decrease of the total magnetic moment. In comparison with the inverse type of Mn<sub>2</sub>CoAl, in both Mn<sub>2</sub>CoAl and Mn<sub>1.75</sub>Co<sub>1.25</sub>Al, the metallic type of the total density of states at the Fermi level was obtained in our calculations. In Mn<sub>1.75</sub>Co<sub>1.25</sub>Al, the total density of electronic states is found to be close to the one of the stoichiometric Mn<sub>2</sub>CoAl alloy in the majority spin projection, and in the minority spin projection spin polarization leads to the formation of the more intense peaks due to the appearance of an additional non-stoichiometric cobalt with a significant magnetic moment, as well as an increase in the magnetic moments of the other magnetic ions. </div> <div> <a data-readmore="{ block: '#abstractTextBlock597062', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 21 </div> </div> <div class="block-bottom-pagination"> <div class="pager-info"> Showing 1 to 10 of 198 Paper Titles </div> <div class="pagination-container"><ul class="pagination"><li class="active"><span>1</span></li><li><a href="/paper-keyword/optical-properties/2">2</a></li><li><a href="/paper-keyword/optical-properties/3">3</a></li><li><a href="/paper-keyword/optical-properties/4">4</a></li><li><a href="/paper-keyword/optical-properties/5">5</a></li><li class="PagedList-ellipses"><a class="PagedList-skipToNext" href="/paper-keyword/optical-properties/6" rel="next">…</a></li><li class="PagedList-skipToNext"><a href="/paper-keyword/optical-properties/2" rel="next">></a></li><li class="PagedList-skipToLast"><a href="/paper-keyword/optical-properties/20">>></a></li></ul></div> </div> </div> </div> </div> </div> </div> <div class="social-icon-popup"> <a href="https://www.facebook.com/Scientific.Net.Ltd/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon facebook-popup-icon social-icon"></i></a> <a href="https://twitter.com/Scientific_Net/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon twitter-popup-icon social-icon"></i></a> <a href="https://www.linkedin.com/company/scientificnet/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon linkedin-popup-icon social-icon"></i></a> </div> </div> <div class="sc-footer"> <div class="footer-fluid"> <div class="container"> <div class="row"> <div class="footer-menu col-md-12 col-sm-12 col-xs-12"> <ul class="list-inline menu-font"> <li><a href="/ForLibraries">For Libraries</a></li> <li><a href="/ForPublication/Paper">For Publication</a></li> <li><a href="/insights" target="_blank">Insights</a></li> <li><a href="/DocuCenter">Downloads</a></li> <li><a href="/Home/AboutUs">About Us</a></li> <li><a href="/PolicyAndEthics/PublishingPolicies">Policy & Ethics</a></li> <li><a href="/Home/Contacts">Contact Us</a></li> <li><a href="/Home/Imprint">Imprint</a></li> <li><a href="/Home/PrivacyPolicy">Privacy Policy</a></li> <li><a href="/Home/Sitemap">Sitemap</a></li> <li><a href="/Conferences">All Conferences</a></li> <li><a href="/special-issues">All Special Issues</a></li> <li><a href="/news/all">All News</a></li> <li><a href="/read-and-publish-agreements">Read & Publish Agreements</a></li> </ul> </div> </div> </div> </div> <div class="line-footer"></div> <div class="footer-fluid"> <div class="container"> <div class="row"> <div class="col-xs-12"> <a href="https://www.facebook.com/Scientific.Net.Ltd/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon facebook-footer-icon social-icon"></i></a> <a href="https://twitter.com/Scientific_Net/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon twitter-footer-icon social-icon"></i></a> <a href="https://www.linkedin.com/company/scientificnet/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon linkedin-footer-icon social-icon"></i></a> </div> </div> </div> </div> <div class="line-footer"></div> <div class="footer-fluid"> <div class="container"> <div class="row"> <div class="col-xs-12 footer-copyright"> <p> © 2024 Trans Tech Publications Ltd. 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