Solid State Sciences最新文献

{"title":"Augmenting the broadband feature in CdS CQDs thin film photodetectors by Ag assimilation","authors":"Tania Kalsi ,&nbsp;Nupur Saxena ,&nbsp;Pragati Kumar","doi":"10.1016/j.solidstatesciences.2024.107805","DOIUrl":"10.1016/j.solidstatesciences.2024.107805","url":null,"abstract":"<div><div>High-performance photodetectors (PDs) with broadband (BB) responses are crucial for many optoelectronic and imaging technologies. In the present work, BBPDs were fabricated employing simple spin coated thin films (TFs) of Cd_(1-x)Ag_xS colloidal quantum dots (CQDs), where x = 0.0 to 0.05. The x-ray diffraction (XRD) patterns of TFs confirm the formation of a cubic phase with a crystallite size very close to Bohr's atomic radius. The existence of microstructural defects like twinning/multiple twinning was confirmed by HRTEM images of the undoped and 3 wt% Ag-doped CdS QDs. The spectral tunability along with modifications in detector characteristic parameters were observed with varying concentrations of Ag. The maximum value of various performance parameters like sensitivity (S), responsivity (R), detectivity (D), and external quantum efficiency (EQE) were estimated as ∼ 1.95 × 10⁴ %, 14.67 A/W, 4.84 × 10¹² cmHz^1/2W⁻¹, and 3.8 × 10³ %, respectively. Besides, the response speed of PD was also improved by twofold due to the insertion of Ag. The fastest PD responds within 104 ms (rise time)/98 ms (fall time). The present work demonstrates BB spectral (405 nm–845 nm) detection by Cd_(1-x)Ag_xS CQDs-based PDs and tunability in the selectivity and detectable wavelength with variation of Ag dopant. The device <em>S</em>_<em>3</em> is the fastest and demonstrated the highest <em>S</em> and <em>D</em> among all devices under 782 nm illumination; however, <em>S</em>_<em>1</em> is optimised for PD in the present study as it delivered the best performance in the said BB spectral region with a reasonably good response speed of 200 ms.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107805"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Features of the formation of baro- and piezocaloric effects in ferroelastics and ferroelectrics","authors":"I.N. Flerov ,&nbsp;M.V. Gorev ,&nbsp;E.V. Bogdanov ,&nbsp;V.S. Bondarev ,&nbsp;E.A. Mikhaleva","doi":"10.1016/j.solidstatesciences.2024.107799","DOIUrl":"10.1016/j.solidstatesciences.2024.107799","url":null,"abstract":"<div><div>The analysis of baro- and piezo-caloric effects in ferroelectrics and ferroelastics containing tetrahedral and octahedral ion groups in the structure is carried out. The role of the degree of structural disorder in the formation of both effects is discussed. The features of the caloric response at phase transitions of different proximity to the tricritical point are revealed. The strong piezocaloric anisotropy of the studied materials is a convenient tool for extending the operating temperature range of the cooling cycle. An important advantage of ferroelastics and ferroelectrics undergoing transformations of the first order is the combination in one material of low thermal hysteresis and high sensitivity to hydrostatic and/or uniaxial pressure.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107799"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Scintillation light yields of Ce-doped BaO-SiO2-P2O5 glasses synthesized by the melt-quenching method","authors":"Akihiro Nishikawa ,&nbsp;Daiki Shiratori ,&nbsp;Takumi Kato ,&nbsp;Daisuke Nakauchi ,&nbsp;Noriaki Kawaguchi ,&nbsp;Takayuki Yanagida","doi":"10.1016/j.solidstatesciences.2024.107807","DOIUrl":"10.1016/j.solidstatesciences.2024.107807","url":null,"abstract":"<div><div>In this study, we synthesized BaO-SiO₂-P₂O₅ glasses doped with 5.0, 10, 15, and 20 % Ce by a melt-quenching method and investigated XRD patterns, transmittance spectra, photoluminescence properties, and scintillation properties. The 5.0–15 % samples were transparent and colorless, while the 20 % sample was colored yellow. All samples indicated only a halo peak, which is characteristic of an amorphous. The absorption originated from the 4f-5d transitions of Ce³⁺, and the charge transfer of O^2--Ce⁴⁺ was observed at 280–310 and 250–370 nm, respectively. Photoluminescence of the 5d-4f transitions of Ce³⁺ was detected in all samples, and the 5.0–15 % samples showed high quantum yields of 86–90 %. As a result of measurements of scintillation properties, the 15 % sample indicated the highest light yield of 685 photons/MeV and an energy resolution of 21 %.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107807"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First principles investigation of phase stability in the B-Pt alloy system","authors":"M. Widom","doi":"10.1016/j.solidstatesciences.2024.107809","DOIUrl":"10.1016/j.solidstatesciences.2024.107809","url":null,"abstract":"<div><div>The B-Pt alloy system contains several Pt-rich phases exhibiting complex structures, many with partial site occupation. It also exhibits a deep (nearly 1000 °C) eutectic. We evaluate the <em>ab-initio</em> total energies of the crystalline solids to clarify the identity and character of the phases. Our work identifies inconsistencies in materials databases such as the Inorganic Crystallographic Structure Database and the ASM Phase Diagram Database, but our total energy calculations allow us to match up experimentally reported stable phases with specific structures. High temperature Gibbs free energy calculations in the liquid and solid states at the composition Pt<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>B reveal that the depth of the eutectic arises from the low energy and high entropy of the liquid state.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107809"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optical and transport properties of Ba(Fe1−xNix)2As2 films","authors":"Yurii A. Aleshchenko ,&nbsp;Andrey V. Muratov ,&nbsp;Elena S. Zhukova ,&nbsp;Lenar S. Kadyrov ,&nbsp;Boris P. Gorshunov ,&nbsp;Giovanni A. Ummarino ,&nbsp;Ilya A. Shipulin","doi":"10.1016/j.solidstatesciences.2024.107787","DOIUrl":"10.1016/j.solidstatesciences.2024.107787","url":null,"abstract":"&lt;div&gt;&lt;div&gt;The broad-band optical spectroscopy was used to study the optical and the hidden transport properties of the Ba(Fe&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;Ni&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;)&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;As&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; superconducting films with different Ni contents. The normal state data were analyzed using a Drude–Lorentz model with two Drude components: narrow and broad ones. In the superconducting state, two gaps with &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;Δ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;k&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;57&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;Δ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;k&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;48&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; are formed for the Ba(Fe&lt;sub&gt;0.965&lt;/sub&gt;Ni&lt;sub&gt;0.035&lt;/sub&gt;)&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;As&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; films, while for the Ba(Fe&lt;sub&gt;0.95&lt;/sub&gt;Ni&lt;sub&gt;0.05&lt;/sub&gt;)&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;As&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; films these characteristic ratios are 1.88–2.08 and 3.66–4.13. Both gaps are formed from the narrow Drude component, whereas the broad Drude component remains ungapped. The calculated from infrared data total dc resistivity of the films with Ni contents &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;05&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;08&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; as well as the low-temperature scattering rate for the narrow Drude component show a hidden Fermi-liquid behavior. On the contrary, the films with &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;035&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; manifest a hidden non-Fermi-liquid behavior. The Allen theory generalized to a multiband systems was applied to the analysis of the temperature dependences of a resistivity of the Ba(Fe&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;Ni&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;)&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;As&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; films. The change of total electron-boson co","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107787"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Force‒magnetic coupling effect of X80 pipeline steel: A study of the coercivity‒stress relationship","authors":"Shuang Zhao ,&nbsp;Yukun Li ,&nbsp;Guoqiang Sun ,&nbsp;Jingjing Yu ,&nbsp;Youqiang Xi","doi":"10.1016/j.solidstatesciences.2024.107814","DOIUrl":"10.1016/j.solidstatesciences.2024.107814","url":null,"abstract":"<div><div>The force‒magnetic coupling effect of ferromagnetic materials is the result of the macroscopic influence of mechanical properties on magnetic properties under the joint action of a stress field and an applied magnetic field, which can essentially be attributed to the transformation of the microscopic structure of the magnetic domain leading to a change in material properties. Taking X80 pipeline steel as an example, the effect of stress on important magnetic parameters (maximum value of the applied magnetic field, value of coercivity, and value of residual magnetic induction) of ferromagnetic materials is investigated under different excitation intensities. The results indicate that the coercivity has the highest degree of sensitivity to stress. With full consideration of the effect of the leakage magnetic field of a semiclosed magnetic circuit, the coercivity is corrected by applying a magnetic conductive adhesive. At the same time, a combination of theoretical derivations and experiments is used to obtain the force‒magnetism coupling equation based on the principle of energy minimization, clarify the relationship model between coercivity and stress, and obtain the response law of coercivity to stress in the stages of elasticity and plastic deformation.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107814"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of Er-doped CaHfO3 single-crystal-scintillators emitting near-infrared photons","authors":"Yusuke Endo,&nbsp;Kensei Ichiba,&nbsp;Daisuke Nakauchi,&nbsp;Takumi Kato,&nbsp;Noriaki Kawaguchi,&nbsp;Takayuki Yanagida","doi":"10.1016/j.solidstatesciences.2024.107783","DOIUrl":"10.1016/j.solidstatesciences.2024.107783","url":null,"abstract":"<div><div>Photoluminescence and scintillation properties of 0.1%, 0.5%, 1.0%, and 5.0% Er:CaHfO₃ single crystals were synthesized and evaluated. The photoluminescence and scintillation spectra showed several emission peaks originating from the 4f–4f transitions of Er³⁺ in visible and near-infrared regions. Dose-rate-response of 0.5%, 1.0%, and 5.0% Er:CaHfO₃ samples showed an excellent linear relationship between dose rate and output signal intensity across the range of 0.0025–51 Gy/h. Based on the results, the 1.0% Er:CaHfO₃ sample exhibited the best performance among all the Er:CaHfO₃ samples.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107783"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modulation of MnO2-BiOCl photocatalyst immobilized in polyvinyl alcohol hydrogel for reusable photodegradation of Rhodamine B and Ibuprofen under visible light","authors":"Sin Ling Chiam ,&nbsp;C.P. Leo ,&nbsp;Swee-Yong Pung ,&nbsp;Wei Lun Ang","doi":"10.1016/j.solidstatesciences.2025.107831","DOIUrl":"10.1016/j.solidstatesciences.2025.107831","url":null,"abstract":"<div><div>The presence of pharmaceutical drugs and organic dyes in water poses significant concerns for both human health and the environment. While photocatalysts offer an effective means of pollutant degradation without generating secondary waste, they are commonly limited by charge recombination and small particle size for large-scale practical use. In this study, BiOCl was chemically deposited on MnO₂ and immobilization in the polyvinyl alcohol hydrogel thin films for the photodegradation of Rhodamine B and Ibuprofen under visible light. The plate-like BiOCl successfully grown between nanoflowers of MnO₂, as proven by scanning and transmission electron microscopy images. Energy dispersive X-ray analysis and Fourier-transform infrared spectroscopy results affirmed the chemical characteristics of BiOCl and MnO₂, while X-ray diffraction patterns confirmed the crystallinity of BiOCl and MnO₂. Optimizing the BiOCl loading, 2:1 in ratio with MnO₂ yielded a PVA thin film with high photocatalytic activity. 99 % of Rhodamine and 97 % of Ibuprofen were degraded in 60 min and 90 min respectively. Even after five recycles, the catalyst maintained over 80 % efficiency for RhB and 70 % for Ibuprofen. The degradation was primarily driven by •O₂⁻ and e⁻ generated by the MnO₂ and BiOCl composite. This study highlights the potential of BiOCl-MnO₂/PVA hydrogel composites for sustainable, reusable, and efficient water treatment applications.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107831"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrothermal growth of vanadium pentoxide nanofibers on carbon nanofiber mat: An anodic material for solid-state asymmetric supercapacitors","authors":"Baban Dey ,&nbsp;Md Wasi Ahmad ,&nbsp;Refat Al-Shannaq ,&nbsp;Tahseen Kamal ,&nbsp;SK Safdar Hossain ,&nbsp;Pulak Dutta ,&nbsp;Arup Choudhury ,&nbsp;Duck-Joo Yang","doi":"10.1016/j.solidstatesciences.2024.107804","DOIUrl":"10.1016/j.solidstatesciences.2024.107804","url":null,"abstract":"<div><div>A supercapacitor is an excellent energy storage solution due to its high-power density, rapid charge and discharging, and long cycle life. However, the main technical issue with supercapacitors is low energy density. One potential solution is to develop advanced electrode materials that store more energy. In this study, we have grown 1D vanadium pentoxide nanofibers (VNFs) on a carbon nanofibers (CNFs) mat via a hydrothermal approach. The morphological study showed that the hybrid mat consists of a sandwich structure of VNFs and CNFs with a large surface area and plenty of pores, which facilitates efficient ion transport and electron movement important for high capacitance. Furthermore, a synergistic combination of pseudo-capacitance and electrical double layer capacitance (EDLC) from redox active VNFs and porous CNFs produces high capacitances of 700.1 and 615.2 F/g at 0.1 A/g in neutral electrolytes such as Na₂SO₄ and Li₂SO₄, respectively. A flexible prototype supercapacitor was constructed using a VNF/CNF hybrid mat as an anode, activated carbon cloth as a cathode, and a Na₂SO₄ or Li₂SO₄-loaded polyvinyl alcohol (PVA) membrane as an electrolyte-cum-separator. These ASC devices delivered high energy density of 72.51 and 51.83 Wh/kg with Na₂SO₄ and Li₂SO₄-based electrolytes, respectively, which are superior to those obtained from previously reported ASCs made with various V₂O₅/C anodes. The PVA-based membrane electrolytes provide excellent bending stability and leakage-proof features to ASCs, which are critical to flexible and wearable electronics.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107804"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and ionic conductivity of Na1+2xMxZr2-x(PO4)3 (M – Mg, Mn) NASICON-type ceramic materials","authors":"Elena A. Asabina ,&nbsp;Vladimir I. Pet'kov ,&nbsp;Irina A. Stenina ,&nbsp;Andrey B. Yaroslavtsev","doi":"10.1016/j.solidstatesciences.2024.107786","DOIUrl":"10.1016/j.solidstatesciences.2024.107786","url":null,"abstract":"<div><div>Ceramics of the Na_{1+2<em>x</em>}M_<em>x</em>Zr_2-<em>x</em>(PO₄)₃ (M − Mg, Mn) composition were synthesized by the co-precipitation technique with subsequent annealing. The samples were characterized using X-ray diffraction with the Rietveld refinement, scanning electron microscopy, and impedance spectroscopy. The studied phosphates belong to the NASICON type structure. The solid solutions (0 ≤ <em>x</em> ≤ 1.0) were shown to be formed in the investigated systems. To study the effect of the chemical composition and sintering additive on conductivity, two series of ceramics were prepared for each phosphate: with and without ZnO (2 wt%) additive. The ionic conductivity of the studied phosphates followed the Arrhenius law and passed through a maximum with <em>x</em> growth. It was shown that the addition of zinc oxide also leads to partial substitution of zirconium in the lattice and an increase in ionic conductivity. The highest conductivity was achieved for the Na_2.6Mg_0.8Zr_1.2(PO₄)₃ ceramic with 2 wt% ZnO additive (6.8∙10⁻³ S cm⁻¹ at 673 К).</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107786"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}