Article
Materials Science, Ceramics
Dipankar Biswas, Rittwick Mondal, Debabrata Mandal, Sonjoy Mondal
Summary: The Bi-incorporated As45-Se(55-x)-Bix (x = 0, 2, 4, 6 at.%) chalcogenide glasses were synthesized using the conventional melt quenching method. X-ray diffraction confirmed their amorphous nature. The variation in linear and non-linear optical properties was investigated from UV-Vis spectroscopy data. The optical band gap energies decreased from 1.82 eV to 1.59 eV with Bi addition, and the Urbach energies increased from 0.048 eV to 0.056 eV. Various optical parameters were analyzed within the range of 300-800 nm, indicating the potential use of these materials in optical devices.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
Siti Norul Fadhilah Zalamin, Mohd Hafiz Mohd Zaid, Khamirul Amin Matori, Muhammad Khalis Abdul Karim, Nurul Afiqah Mohamad Yamin, Nur Atikah Nazihah Ismail
Summary: This research investigates the optical and luminescence properties of a new tellurite glass system. The synthesized glasses exhibit amorphous structure and show multiple energy transition bands and strong emission peaks. The findings are significant for understanding and applying the optical properties of tellurite glass systems.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Optics
Fahimeh Ahmadi, Rosli Hussin, Sib Krishna Ghoshal
Summary: The prepared magnesium-zinc-sulfophosphate glasses were characterized with XRD patterns and various optical properties were calculated for each sample. The density of the glasses increased with Dy3+ concentration, while the molar volume initially decreased and then increased with 1.5 mol% Dy2O3. The optical energy band gap linearly increased with Dy2O3 concentration up to 1.5 mol%, possibly due to the formation of NBOs, and other optical properties showed similar trends with Dy3+ content.
Article
Materials Science, Multidisciplinary
H. Aghababaei, A. Faeghinia, F. Soleimani
Summary: The P2O5-TiO2-CaO system was studied as a suitable host for rare-earth ions. Glasses doped with neodymium showed an increase in absorbance and a decrease in emission intensity, indicating a change in optical properties. The addition of Nd also led to a decrease in direct optical band gap energy and an increase in Urbach energy.
Article
Materials Science, Ceramics
H. Es-soufi, L. Bih
Summary: Phosphate glasses in the 20Li(2)O-(40-x)Li2MoO4-xTiO(2)-40P(2)O(5) system were prepared and characterized to investigate their structural and optical properties. The study found that properties such as density, molar volume, glass transition temperature, and optical band gap energy were influenced by the chemical composition of the glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Y. Chaitanya, S. Yusub, A. Ramesh Babu, V. Aruna, N. Sree Ram, Ch Linga Raju
Summary: The present study investigates the physical, structural, spectroscopic, and dielectric properties of a multi-component glass network containing 3Bi(2)O(3)-10CaO-20P(2)O(5)-(67-x)B2O3: xCuO. The results show that the concentration of CuO affects the optical and electrical properties of the glasses. The presence and valence state of copper ions were confirmed through optical absorption and electron spin resonance spectroscopy. The structural variations were revealed by Fourier transform infrared studies. The dielectric properties of the glasses were found to decrease with increasing CuO concentration.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
S. K. Zhu, Y. Q. Sun, Y. H. Pan, X. Chen, K. Bai, Y. C. Wang, F. Yang, K. M. Qin, J. J. Mao, X. Y. Zhang, T. S. Wang, H. B. Peng
Summary: This study investigates the effects of gamma radiation on the network of borosilicate glass and reveals the production of point defects and the loss of surface elements in the glass after irradiation.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Analytical
Tianfeng Xue, Zhongqi Xu, Tao He
Summary: A simple CE method was developed to analyze HbA1c, reporting the binding constant of Na2B4O7 and HbA1c for the first time. It was found that adding Spd could inhibit EOF well and a few mM of Spd concentration provided perfect resolutions. The performance of the method was validated by analyzing actual blood specimens, showing acceptable ability to separate hemoglobin forms.
MICROCHEMICAL JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Bekir Asilcan Unlu, Gokhan Bilir, Mustafa Yuksek, Ahmet Karatay, Elif Akhuseyin Yildiz, Ayhan Elmali
Summary: This study investigates the structural, optical, and nonlinear absorption properties of (GeO2)(1-x)-(PbF2)(x) glasses, demonstrating the influence of PbF2 content on bandgap energy, Urbach energy, and nonlinear absorption. Various absorption models were considered in the evaluation of experimental data. The highest and lowest PbF2 contents corresponded to the highest and lowest effective nonlinear absorption coefficients.
Article
Materials Science, Multidisciplinary
Bekir Asilcan Unlu, Gokhan Bilir, Mustafa Yuksek, Ahmet Karatay, Elif Akhuseyin Yildiz, Ayhan Elmali
Summary: The structural, optical, and nonlinear absorption properties of (GeO2)(1-x)(PbF2)(x) glasses were investigated. It was found that increasing the PbF2 content led to an increase in bandgap energy and a decrease in Urbach energy. Nonlinear absorption properties were evaluated using Z-scan experiment and a theoretical model.
Article
Materials Science, Multidisciplinary
Hesham M. H. Zakaly, Saloua Helali, O. I. Sallam, Albandari W. Alrowaily, N. A. Elalaily, Shams A. M. Issa
Summary: The impact of gamma irradiation on PbO-B2O3-Na2O glasses doped with CdO, BaO, MoO3, and WO3 was studied. X-ray diffraction confirmed the amorphous nature of the glass samples. Infrared and UV-vis spectroscopic techniques were used to study the structural and optical properties. The optical energy gap, index of refraction, and Fermi energy were analyzed using UV-vis spectroscopy. ESR spectra confirmed the resonance paramagnetic centers for all prepared samples.
Article
Materials Science, Multidisciplinary
Zihan Wu, Pingyuan Yan, Shu Hu, Bo Yang, Chengqiang Wang, Chenhong Xiang, Heng Li, ChuanXiang Sheng
Summary: The effects of precursor solution concentration, spin coating speed, and substrate temperature on the crystallinity and optical properties of (BA)2FA2Pb3I10 films were compared. Two-dimensional perovskite films and solar cells were fabricated on room temperature or 110 degrees C substrates using (BA)2(FA)n-1PbnI3n+1 with the same molar ratio of components and with thiourea added in the precursor solution. The concentration of the precursor solution had a significant impact on crystalline orientation and domain size, while spin coating speed showed no significant effect.
Article
Physics, Multidisciplinary
Pierluigi Contucci, Federico Corberi, Jorge Kurchan, Emanuele Mingione
Summary: This study further explores systems in contact with multiple baths of different temperatures, considering their thermalization behavior. By using thermodynamic integration, the stationary distribution can be recovered based on measurements from a 'multi-reversible' transformation. The research shows that the system at each step can be described by a generalization of the Boltzmann-Gibbs distribution.
Article
Mathematics, Applied
Gerard Ben Arous, Aukosh Jagannath
Summary: The objective of this study is to gain a better understanding of the relationship between replica symmetry breaking, shattering, and metastability. To achieve this, we investigated the static and dynamic behavior of spherical pure p-spin glasses above the replica symmetry breaking temperature Ts. Within this range, we identified at least two distinct temperatures associated with non-trivial behavior. Firstly, we demonstrated the existence of a shattering phase in the spherical p-spin model within a temperature regime above but close to Ts. Additionally, we found that metastable states persist up to a higher temperature TBBM, as predicted by Barrat-Burioni-Mezard, which is expected to be higher than the phase boundary for the shattering phase Td.
COMMUNICATIONS ON PURE AND APPLIED MATHEMATICS
(2023)
Article
Mathematics, Applied
Eliran Subag
Summary: The paper focuses on spherical spin glasses with support[0,q], constructing paths to find ground-state energy points on the sphere using a greedy strategy. It provides an algorithm to solve this problem efficiently. Additionally, for full-RSB models with support[0,q], the correct lower bound on the free energy is proven by the authors.
COMMUNICATIONS ON PURE AND APPLIED MATHEMATICS
(2021)
Article
Materials Science, Multidisciplinary
K. Chandra Sekhar, Abdul Hameed, N. Narsimlu, Jamila S. Alzahrani, Miysoon A. Alothman, I. O. Olarinoye, M. S. Al-Buriahi, Md Shareefuddin
Summary: In this study, a new glass combination containing PbO, Bi2O3, B2O3, and Fe2O3 was synthesized, characterized, and studied for advanced optical and radiation shielding applications. Physical and optical parameters were experimentally measured, structure characterization was performed using FTIR and XRD, EPR spectra were studied, and a Monte Carlo method was utilized for simulation setup to study radiation propagation through the prepared samples. The results indicate potential for the prepared glass system in advanced optical and shielding applications.
Article
Materials Science, Ceramics
Mohamad Raheem Ahmed, K. Chandra Sekhar, Sheik Ahammed, Vasant Sathe, Z. A. Alrowaili, Mongi Amami, I. O. Olarinoye, M. S. Al-Buriahi, B. T. Tonguc, Md. Shareefuddin
Summary: This study investigated the optical, structural, physical, and radiation shielding properties of glass samples with specific compositions. The results showed that the glasses exhibited good shielding effects against photons and neutrons, with SABV0 glass showing the best photon shielding ability and SABV1 glass demonstrating superior fast neutron moderating capacity. The prepared glasses are considered suitable for radiation protection applications.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Yasser B. Saddeek, Hesham M. H. Zakaly, K. Chandra Sekhar, Shams A. M. Issa, T. Alharbi, Ali Badawi, Md Shareefuddin
Summary: Glass samples doped with different concentrations of BaTiO3 were prepared using the traditional melt quenching method. The structural and performance properties of the samples were investigated using X-ray diffraction and FTIR studies. The results showed that the addition of BaTiO3 improved the density and mechanical properties of the glass, while reducing the photon transmission ability. The experimental results were consistent with the simulation results obtained using the FLUKA code.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Optics
G. Sangeetha, K. Chandra Sekhar, M. Narasimha Chary, Md Shareefuddin
Summary: In this study, the effect of alkaline earth oxide on sodium tetraborate was analyzed by fabricating a range of glasses. The results showed that the addition of MgO decreased the density of the glass and led to volume enlargement. Optical studies also revealed indirect transitions and greater stability in the glasses.
Article
Materials Science, Ceramics
Chandrasekhar Maalegoundla, K. Chandra Sekhar, Abdul Hameed, B. Srinivas, Md Shareefuddin
Summary: In this study, the effect of Al2O3 content on calcium fluoride incorporated alumina-bismuth borate glasses was investigated. Various techniques including density, optical, EPR, Raman, and FTIR spectroscopy were employed. The results showed that density decreased and bandgap values increased with increasing Al2O3 content. Cu2+ ions were found to occupy octahedral sites with tetragonal distortion, and the glasses were composed of BiO6, BO3, BO4, and alumina polyhedral structures.
JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
R. Nagaraju, L. Haritha, K. Chandra Sekhar, Md Shareefuddin, G. Lalitha, K. Vijaya Kumar
Summary: This study investigates the structural, optical, and spectroscopic properties of glasses with a specific composition for potential applications in optical and shielding materials. The results show that the glasses are amorphous in nature and exhibit increased refractive index values with higher CdF2 content, making them suitable for fiber optic communication. Analysis of the spectra also reveals the presence of metal cations and oxides in the samples. The increase in CdF2 concentration leads to significant changes in density, energy band gap, and refractive index values.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
S. Rajesham, K. Chandra Sekhar, Md Shareefuddin, J. Siva Kumar
Summary: This manuscript discusses the preparation and detailed physical and structural study of B2O3-CdO-Al2O3-PbF2 glasses reinforced with MoO3 ions. The addition of MoO3 resulted in a decrease in density and band gap values, and an increase in refractive index, indicating the transformation of Mo6+ ions to Mo5+ ions and the formation of NBOs in the glasses. FTIR spectra revealed the presence of different borate and aluminate units, as well as the conversion of Mo6+ ions to Mo5+ ions. The Raman spectra showed the effect of MoO3 ions, indicating the conversion of BO4 to BO3 units and the increase in NBOs, providing an explanation for the density variation.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Physics, Multidisciplinary
Arukula Balakrishna, B. Srikantha Chary, K. Chandra Sekhar, Samdani, Md Shareefuddin
Summary: Glasses with varying BaTiO3 compositions were prepared by melt-quenching process, showing increased density and decreased molar volume as BaTiO3 content increased. These glasses are suitable for radiation shielding and optical fiber core material.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Optics
Samdani, Gharam A. Alharshan, L. Haritha, K. Chandra Sekhar, Z. A. Alrowaili, I. O. Olarinoye, M. S. Al-Buriahi
Summary: This paper reports on the preparation and characterization of the optical 15MgO-15BaO-(59.5-x)B2O3-(10+x)TeO2 glass system. The influence of TeO2 on the physical, structural, optical, and radiation shielding properties were studied. Parameters such as bandgap, refractive index, stopping power, and range of various particles were calculated, and the glass network structure and functional groups were analyzed.
Article
Materials Science, Ceramics
R. Umamaheswara Singh, K. Chandra Sekhar, Jamila S. Alzahrani, Z. A. Alrowaili, Md. Shareefuddin, Y. Purushotham, I. O. Olarinoye, M. S. Al-Buriahi
Summary: The study focuses on the physical and structural aspects of B2O3-CdO-ZnO-Na2O glasses reinforced by MoO3 ions. The amorphous nature of the samples was confirmed by the absence of strong peaks in the XRD spectra. Optical, Raman, and radiation-shielding qualities were evaluated and described. Structural changes were investigated using FTIR and Raman spectra. The density of the samples increased with the addition of MoO3, and the band gap decreased due to the transition of Mo6+ to Mo5+ ions. The glasses showed potential as environmentally friendly and transparent radiation barriers in nuclear facilities.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
G. Nagaraju, Gharam A. Alharshan, K. Chandra Sekhar, Z. A. Alrowaili, Md Shareefuddin, I. O. Olarinoye, D. Karuna Sagar, M. S. Al-Buriahi
Summary: Characterization of xPbCl(2)-10CdO-20Bi(2)O(3)-(70- x)B2O3 glasses reveals their potential for optical and radiation protection applications. The synthesized glass samples display transparency, amorphous structures, and distinct functional groups. The optical properties, such as band gap and refractive index, vary with the glass composition. The gamma shielding ability of the glasses improves with increasing PbCl2 content.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Optics
B. Kavitha, K. Chandra Sekhar, K. Siva Kumar, N. Narsimlu
Summary: PVA-TiO2-NaBr (PVATN) polymer composites were synthesized by solution casting technique. XRD, optical absorption, FTIR, and Raman spectroscopy were used to study the influence of TiO2/NaBr on PVATN polymer samples. XRD spectra showed the modification of the semi-crystalline phase of PVATN polymers with respect to TiO2/NaBr weight % and TiO2 anatase phase. The optical absorption spectra of PVATN polymer samples exhibited a blue shift in the absorption edges with the change in composition. Urbach energy and refractive index values were evaluated and discussed using optical data. The FTIR spectra of several functional groups in PVA/TiO2 were analyzed. Raman spectra showed the presence of various vibrations in the polymer samples.
Article
Materials Science, Multidisciplinary
B. Srikantha Chary, Arukula Balakrishna, B. Srinivas, K. Chandra Sekhar, Abdul Hameed, Md Shareefuddin
Summary: The present study focuses on the synthesis and characterization of BaF2-TeO2 - Li2B4O7-CuO glasses. The glasses were prepared using the melt quenching method, and their properties were analyzed using various spectroscopic techniques. XRD analysis confirmed the amorphous nature of the samples. The addition of BaF2 increased the band gap values obtained from the Tauc plot.
Article
Physics, Multidisciplinary
B. Ashok, K. Chandra Sekhar, B. Srikantha Chary, G. Ramadevudu, M. Narasimha Chary, Md. Shareefuddin
Summary: Increasing NaBr content nonlinearly decreases the density of the samples, while Cu2+ ions are found in tetragonally contorted octahedral locations with d(x2-y2) as the lowest energy state.
INDIAN JOURNAL OF PHYSICS
(2022)