Indian Journal of Physics最新文献_第7页

Synergized structural and optical features of ZnWO4/PbS heterostructure nanocomposites ZnWO4/PbS异质结构纳米复合材料的协同结构和光学特性

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-03-24 DOI: 10.1007/s12648-025-03578-0

Zein K. Heiba, Asmaa M. Abozied, Noura M. Farag, A. M. El-naggar, Ali Badawi, Mohamed Bakr Mohamed

{"title":"Synergized structural and optical features of ZnWO4/PbS heterostructure nanocomposites","authors":"Zein K. Heiba, Asmaa M. Abozied, Noura M. Farag, A. M. El-naggar, Ali Badawi, Mohamed Bakr Mohamed","doi":"10.1007/s12648-025-03578-0","DOIUrl":"10.1007/s12648-025-03578-0","url":null,"abstract":"<div><p>Nanocomposite (1 − x)ZnWO<sub>4</sub>/xPbS ( x = 0, 0.05, 0.1, 0.15), samples have been synthesized through combining hydrothermal and thermolysis process. Synchrotron x-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Raman, diffused reflectance, and photoluminescence (PL) techniques were employed to explore the influence of varied quantities of PbS on the structure and optical properties of the synthesized nanocomposite samples. XRD Rietveld analysis revealed existence of PbS as a minor phase but with percent less than (x); large part of Pb and S ions were interstitially or substitutionally integrated into the ZnWO<sub>4</sub> matrix. FTIR and Raman investigations authorized the integration of Pb and S ions within the ZnWO<sub>4</sub> lattice. Utilizing the UV–visible diffuse reflectance spectra, the light absorption, extinction coefficient, refractive index, and nonlinear optical properties of ZnWO<sub>4</sub> were examined in relation to PbS percent. The optical absorption of nanocomposites was significantly enhanced as the PbS content is raised, especially in the visible region. The nanocomposite samples exhibited optical band gap values of 4.05, 3.72, 3.71, and 3.39 eV for x = 0, 0.05, 0.1, 0.15 respectively. The refractive index of each sample was determined using various models based on their respective optical band gap values. As the PbS content increased, the nonlinear optical properties enhanced, and refractive index enlarged. Adding PbS to ZnWO<sub>4</sub> causes the PL intensity to drastically quenched.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 10","pages":"3927 - 3936"},"PeriodicalIF":1.7,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144880814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anisotropic model with variable (Lambda) and G: observational aspects and singularity analysis 具有变量(Lambda)和G的各向异性模型：观测方面和奇点分析

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-03-24 DOI: 10.1007/s12648-025-03587-z

S. Kotambkar, Prerna Parkhi, Ashutosh Singh

引用次数: 0

Continuously tunable Nd:NaLa(WO4)2 laser operating in 1300–1400 nm spectral region on 4F3/2 → 4I13/2 transition 连续可调谐Nd:NaLa(WO4)2激光器工作在1300-1400 nm光谱区，4F3/2→4I13/2跃迁

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-03-24 DOI: 10.1007/s12648-025-03584-2

C Chu, Y Li, Z Hu, Z Du

引用次数: 0

A tunable wavelength Q-switched fiber laser at C-band region by using CuPc as a saturable absorber 利用CuPc作为可饱和吸收体制备c波段可调谐波长调q光纤激光器

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-03-22 DOI: 10.1007/s12648-025-03579-z

Sana S. H. Al-Asaadi, Sameer Salam, Abdulkadir Mukhtar Diblawe, Irfan Anjum Badruddin, Sarfaraz Kamangar, Sulaiman Wadi Harun

{"title":"A tunable wavelength Q-switched fiber laser at C-band region by using CuPc as a saturable absorber","authors":"Sana S. H. Al-Asaadi, Sameer Salam, Abdulkadir Mukhtar Diblawe, Irfan Anjum Badruddin, Sarfaraz Kamangar, Sulaiman Wadi Harun","doi":"10.1007/s12648-025-03579-z","DOIUrl":"10.1007/s12648-025-03579-z","url":null,"abstract":"<div><p>We utilized a Copper Phthalocyanines (CuPc) thin film as a saturable absorber (SA) to generate Q-switched pulses at 1560.6 nm. This CuPc SA exhibited a modulation depth of approximately 1.5% in nonlinear optical transmission at 1572 nm, alongside a linear absorption of about 3.2 dB across the full gain bandwidth of the erbium-doped fiber. As the input power increased, the pulse width decreased and the repetition rate rose from 9.8 µs and 35 kHz to 4.64 µs and 54 kHz, respectively. We then introduced a tunable band pass filter (TBPF) into the laser cavity. By adjusting the TBPF, we varied the central wavelength across the C-band region, from 1520.2 to 1560.2 nm, while maintaining stable Q-switched operation. The CuPc SA was fabricated affordably and easily, delivering consistent performance with a high signal-to-noise ratio exceeding 61 dB. The ability to achieve tunable and stable Q-switching with an organic SA could lead to significant advancements in fiber laser technology.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 10","pages":"3937 - 3942"},"PeriodicalIF":1.7,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144880763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Developing small molecule-based donor materials for organic solar cells: a DFT/TD-DFT insight 开发有机太阳能电池的小分子供体材料：DFT/TD-DFT洞察

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-03-21 DOI: 10.1007/s12648-025-03575-3

F. Rehman, M. Sajid, H. S. Batool, K. Ali, E. Fatima, S. A. Bakar, Y. Javed

{"title":"Developing small molecule-based donor materials for organic solar cells: a DFT/TD-DFT insight","authors":"F. Rehman, M. Sajid, H. S. Batool, K. Ali, E. Fatima, S. A. Bakar, Y. Javed","doi":"10.1007/s12648-025-03575-3","DOIUrl":"10.1007/s12648-025-03575-3","url":null,"abstract":"<div><p>Organic solar cells (OSCs) hold significant promise for sustainable energy solutions due to their lightweight design, low cost, and mechanical flexibility. In this study, novel small molecule donor materials (SMDs) for OSCs are designed and optimized using density functional theory (DFT) and time-dependent DFT (TD-DFT). All computational calculations were carried out using the Gaussian 09 program package to design donor molecules for OSCs. Density functional theory (DFT) functionals, namely B3YLP, CAM-B3LYP, MPW1PW91, and WB97XD, with 6-31G(d,p) levels of theory in suitable solvents were employed to compute different parameters such as frontier molecular orbital, binding energy, and open circuit voltage (V<sub>oc</sub>). The designed SMDs exhibited reduced band gaps (1.27–1.86 eV) and extended absorption spectra, with λ<sub>max</sub> values reaching 600.8 nm in chloroform solvent. Among the molecules, S1 demonstrated the highest light-harvesting efficiency (LHE = 0.89) and optimal reorganization energy for charge mobility. The results provide insights into the development of efficient and stable donor materials, facilitating advancements in OSC technology.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 10","pages":"3915 - 3926"},"PeriodicalIF":1.7,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144880952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mass spectra and expectation values of temperature dependent generalized cornell potential 温度相关广义康奈尔势的质谱和期望值

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-03-21 DOI: 10.1007/s12648-025-03583-3

W. O. Etebu, A. N. Ikot, S. Onwueneme, H. Alrebdi, R. Horchani, Uduakobong S. Okorie

{"title":"Mass spectra and expectation values of temperature dependent generalized cornell potential","authors":"W. O. Etebu, A. N. Ikot, S. Onwueneme, H. Alrebdi, R. Horchani, Uduakobong S. Okorie","doi":"10.1007/s12648-025-03583-3","DOIUrl":"10.1007/s12648-025-03583-3","url":null,"abstract":"<div><p>The Schrödinger wave equation with the generalized Cornell potential model parameterized for a thermal medium at finite temperature was studied using Nikiforov Uvarov method. The bound state energy and mass spectra were obtained. The results were applied for the charmonium and bottomonium mesons to offer phenomenological predictions for their mass spectra, in order to understand their disassociation property of their mass spectra within the temperature range 0.025 GeV ≤ T ≤ 0.41 GeV, with the critical the temperature <span>({T}_{c})</span> as 0.169 GeV. Also, the Hellmann–Feynman Theorem was used to obtain the expectation values of the square of inverse of position <span>(langle {r}^{-2}rangle )</span>, the kinetic energy <span>(langle Trangle )</span>, and the square of momentum <span>(langle {p}^{2}rangle )</span> for the quantum state as the charmonium and bottomonium. The phenomenological predicted results were compared with experimental data, yielding a percentage error of approximately 2.11% for charmonium and 0.84% for bottomonium. The mass spectra for the charmonium meson for the quantum states showed no complete indication of disassociation, for temperature values up to <span>(2.43{T}_{c})</span>, while for the bottomonium meson there was a complete disassociation of its mass spectrum for all their corresponding quantum states, for temperature values at <span>(2.43{T}_{c})</span>. The expectation values showed similar characteristics between the charmonium and bottomonium mesons for same quantum states, with the charmonium meson leading only in the expectation values for <span>(langle Trangle )</span>, but lagging behind the bottomonium meson in the expectation values for <span>(langle {r}^{-2}rangle )</span> and <span>(langle Trangle )</span>.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 9","pages":"3531 - 3548"},"PeriodicalIF":1.7,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the structural, electronic, mechanical, and thermodynamic properties of X2CuIO6 (X = Sr, Ba) double perovskites via first-principles calculations 通过第一性原理计算探索X2CuIO6 （X = Sr, Ba）双钙钛矿的结构、电子、机械和热力学性质

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-03-20 DOI: 10.1007/s12648-025-03580-6

Suneela Ismat, Urooj Jalal, Wareesha Jabbar, Malak Azmat Ali, Adel El-marghany, Afzal Khan

{"title":"Exploring the structural, electronic, mechanical, and thermodynamic properties of X2CuIO6 (X = Sr, Ba) double perovskites via first-principles calculations","authors":"Suneela Ismat, Urooj Jalal, Wareesha Jabbar, Malak Azmat Ali, Adel El-marghany, Afzal Khan","doi":"10.1007/s12648-025-03580-6","DOIUrl":"10.1007/s12648-025-03580-6","url":null,"abstract":"<div><p>In this article, we used first principles calculations to predict the structural, electronic, elastic, mechanical, and thermodynamic properties of cubic double perovskites, X<sub>2</sub>CuIO<sub>6</sub> (X = Sr, Ba). These compounds were analyzed as structurally, dynamically, and thermodynamically stable based on the calculated results of the tolerance factor, formation energy, and positive phonon frequencies, respectively; additionally, the mechanical stability was confirmed by the elastic constants C<sub>11</sub>, C<sub>12</sub>, and C<sub>44</sub>. The electronic properties demonstrated that X<sub>2</sub>CuIO<sub>6</sub> perovskites are metallic since the valence and conduction bands overlap with a 0 eV band gap at the fermi level. The mechanical properties revealed the ductile and anisotropic nature. The thermodynamic parameters, bulk modulus, volume, Debye temperature, heat capacity, and thermal expansion were calculated in a wide range of temperature and pressure using the quasi-harmonic Debye model. Up to 700 K, the specific heat for both double perovskites was found to follow the Debye model (CV α T<sup>3</sup>); after that, it follows the Dulong-Petit law (CV ~ 3R).</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 10","pages":"3667 - 3675"},"PeriodicalIF":1.7,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144881007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rare-earth metal oxide nanocomposites with carbon as electrode for supercapacitors 以碳为电极的稀土金属氧化物纳米复合材料

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-03-20 DOI: 10.1007/s12648-025-03576-2

Sidra Khalid, Sidra Ashraf, Nourah F. Almuhawish, Mir Waqas Alam

{"title":"Rare-earth metal oxide nanocomposites with carbon as electrode for supercapacitors","authors":"Sidra Khalid, Sidra Ashraf, Nourah F. Almuhawish, Mir Waqas Alam","doi":"10.1007/s12648-025-03576-2","DOIUrl":"10.1007/s12648-025-03576-2","url":null,"abstract":"<div><p>In this study, Oxides of rare earth metals Holmium and Cerium have been prepared for the purpose of their use in supercapacitors. This study shows the successful synthesis of Cerium oxide/Carbon (CeO<sub>2</sub>/C), and Holmium oxide (Ho<sub>2</sub>O<sub>3</sub>/C) nanocomposites by using the hydrothermal method. It not only contributes to advancing the fundamental understanding of electrode materials but also addresses the practical challenges in developing high-performance energy storage devices. Through systematic characterization and electrochemical evaluation, we aim to demonstrate the superior performance and potential scalability of these nanocomposites, paving the way for their application in next-generation supercapacitor technologies<b>.</b> X-ray Diffraction, Field Emission Scanning Electron Microscopy and electrochemical characterizations are employed to explore the properties of all prepared samples. X-ray diffraction results exhibit the polycrystalline nature and pure phase of synthesized materials. N<sub>2</sub>-sorption study shows the type II characteristic isotherm and H<sub>3</sub> hysteresis loop which indicates type IV isotherms which confirms that the materials are of macro porous plus mesoporous nature. From Cyclic Voltammetry analysis exhibited the nanocomposites Pseudo capacitive storage mechanism. The Galvanostatic charge–discharge test indicated that CeO<sub>2</sub>/C nanocomposite have shown maximum specific capacitance of 100 F/g. Electrochemical Impedance Spectroscopy plot gives the good agreement of solution resistance of electrodes about 1 Ω. CeO<sub>2</sub>/C nanocomposites have shown best specific capacitance C<sub>s</sub> among the two prepared nanocomposites and have the capacity to be used as an electrode material for supercapacitors.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 10","pages":"3657 - 3665"},"PeriodicalIF":1.7,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144881006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel CdS/MWCNTs/CuO nanocomposite with high photocatalytic and antimicrobial activity 具有高光催化和抗菌活性的新型CdS/MWCNTs/CuO纳米复合材料

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-03-14 DOI: 10.1007/s12648-025-03581-5

Safaa M. Kheder, Haitham Talib Hussein, Huda Mahmood Alattar

{"title":"Novel CdS/MWCNTs/CuO nanocomposite with high photocatalytic and antimicrobial activity","authors":"Safaa M. Kheder, Haitham Talib Hussein, Huda Mahmood Alattar","doi":"10.1007/s12648-025-03581-5","DOIUrl":"10.1007/s12648-025-03581-5","url":null,"abstract":"<div><p>This research used the co-precipitation approach to design the CdS/MWCNTs/CuO nanocomposite. Characterizations were conducted using several techniques, including X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), Fourier transformation infrared spectroscopy (FTIR), and UV–Vis spectrophotometry. adding MWCNTs improved the surface properties, increased the number of photocatalytic sites, and reduced the energy gap compared to pure CdS and CuO NPs. After 150 min of irradiation, the nanocomposite, which was deposited as a thin film to evaluate the photodegradation of methylene blue (MB) dye under sunlight exposure, achieved an efficiency of 77% in a typical aqueous medium. The CdS/MWCNTs/CuO nanocomposite demonstrated a degrading efficiency of 79.5% at pH 9 and enhanced to 85.86% at pH 10. The antimicrobial activity exhibited substantial inhibition zones against Staphylococcus aureus, Escherichia coli, and the fungal strain Candida albicans. the synthesized novel nanocomposite possesses outstanding photocatalytic and antimicrobial properties.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 10","pages":"3805 - 3825"},"PeriodicalIF":1.7,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144880987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microwave absorption analysis of graphene decorated carbon fiber reinforced electromagnetic material 石墨烯装饰碳纤维增强电磁材料的微波吸收分析

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-03-14 DOI: 10.1007/s12648-025-03574-4

R Barik, B Samantara, Priyanka P Singh, M P K Sahoo, G Nath

引用次数: 0