{"title":"Conductivity and magneto-optical response of film structures based on tungsten nanolayers with different phase composition","authors":"A.V. Prokaznikov , R.V. Selyukov , V.A. Paporkov","doi":"10.1016/j.cap.2025.02.002","DOIUrl":"10.1016/j.cap.2025.02.002","url":null,"abstract":"<div><div>Electrical properties of thin W films containing α-W and β-W are studied depending on their thickness, substrate material, phase composition and microstructure. The thickness dependence of phase composition is presented. The theoretical estimations according to quantum mechanical approaches result in good agreement with experimental results for α-W films. The major mechanism of charge carriers scattering in tungsten crystal is the scattering on deformation potential. The thickness dependence of resistivity is investigated experimentally and theoretically, which indicates the dominant contribution of grain-boundary scattering as well as the influence of the interfaces in multilayer structures. The tunneling mechanism is proposed to explain the grain boundary scattering. Transverse magneto-optical Kerr effect indicates the absence of uniaxial symmetry in Co/W system that testifies about the features of tungsten films.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"72 ","pages":"Pages 78-86"},"PeriodicalIF":2.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419192","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}
{"title":"Hydrothermal synthesis of iron oxide grown on nickel foam for supercapacitors","authors":"Keshab Pandey , Yong Gyu Lee , Hae Kyung Jeong","doi":"10.1016/j.cap.2025.01.011","DOIUrl":"10.1016/j.cap.2025.01.011","url":null,"abstract":"<div><div>Metal oxides with nanostructures and nickel foam (NF) are evaluated as highly promising electrode materials for supercapacitors, though their performance is required for practical applications. In this study, we synthesized iron oxide nanoparticles from iron nitrate nonahydrate onto NF via a hydrothermal process at a low temperature of 120 °C for a short duration of 6 h. The performance was significantly influenced by optimizing the mass ratio of iron nitrate nonahydrate (0.25, 0.5, and 1 mmol) in terms of charge storage capability, surface area, impedance behavior, and energy density. The optimal loading of 0.5 mmol of iron nitrate nonahydrate on NF-based supercapacitors achieved a specific capacitance of 191.4 F g⁻<sup>1</sup> with an energy density of 17.1 Wh Kg⁻<sup>1</sup> at 1 A g⁻<sup>1</sup>. The relatively simple synthesis process and excellent performance of the iron oxide on NF composite highlights its potential as an electrode material for next-generation symmetric supercapacitors.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"72 ","pages":"Pages 56-64"},"PeriodicalIF":2.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396002","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}
M.Z. Najihah , M.F. Aizamddin , Farish Irfal Saaid , Tan Winie
{"title":"Enhanced efficiency of dye-sensitized solar cells (DSSCs) with polyaniline-decorated FeCo2O4 counter electrodes: Synthesis, characterization, and performance analysis","authors":"M.Z. Najihah , M.F. Aizamddin , Farish Irfal Saaid , Tan Winie","doi":"10.1016/j.cap.2025.01.017","DOIUrl":"10.1016/j.cap.2025.01.017","url":null,"abstract":"<div><div>In this work, FeCo<sub>2</sub>O<sub>4</sub> (FCO)/polyaniline (PANI) composite has been prepared and its performance in DSSCs has been compared with pristine FCO, PANI and platinum (Pt). X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HR-TEM) have been employed for the structural and morphological analyses. Contact angle measurement has been performed to examine the contact between electrode and electrolyte. Electrocatalytic effects have been investigated through cyclic voltammetry (CV) and Tafel polarization. Electrochemical impedance spectroscopy (EIS) has been carried out to study the internal resistance and charge transfer kinetics. The FCO exhibits flower-like nanosheets structure whereas the PANI shows irregular coral-reef structure. A similar flower-like morphology is observed in the FCO/PANI composite. The surface of the composite appears to be rough and porous, which improves the electrode-electrolyte contact, as supported from the contact angle measurement. The FCO/PANI composite exhibits the highest electrocatalytic activity and the lowest charge transfer resistance, followed by PANI, FCO and Pt. The efficiencies of DSSCs assembled with FCO, PANI, FCO/PANI and Pt counter electrodes are 4.22, 5.58, 6.38, and 3.58 %, respectively. Superior cell efficiency with FCO/PANI counter electrode is attributed to its rough and porous morphology, greater adherence on the FTO glass and higher I<sub>3</sub><sup>−</sup> reduction rate.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"72 ","pages":"Pages 28-38"},"PeriodicalIF":2.4,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377168","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}
Seval Hale Guler , Alican Yakin , Omer Guler , Arun K. Chattopadhyay , Tuncay Simsek
{"title":"A critical review of the refractory high-entropy materials: RHEA alloys, composites, ceramics, additively manufactured RHEA alloys","authors":"Seval Hale Guler , Alican Yakin , Omer Guler , Arun K. Chattopadhyay , Tuncay Simsek","doi":"10.1016/j.cap.2024.11.001","DOIUrl":"10.1016/j.cap.2024.11.001","url":null,"abstract":"<div><div>In this study, the traits, production methods, and applications of refractory high-entropy materials—including refractory high-entropy alloys (RHEAs), refractory high-entropy composites (RHE-Cs), and refractory high-entropy ceramics (RHE-Ce)—which are part of the broader category of refractory high-entropy materials with a wide range of applications, have been thoroughly examined and discussed. RHEAs have emerged as materials that exhibit superior properties, such as high melting temperatures, excellent temperature resistance, and high wear and corrosion resilience, in addition to high mechanical and fatigue strength. These attributes have made them extensively studied materials in recent times. The properties of RHEAs suggest their safe operation in challenging environments such as nuclear reactors, gas turbines, aerospace, and energy production. Among refractory materials, RHE-Cs stand out for their high strength and low density, showing significant potential for use in the automotive, aerospace, and space industries. Another group with a wide range of applications, RHE-Ce materials, is distinguished by their high-temperature resilience, high hardness, and low thermal conductivity, making them suitable for high-temperature environments. Refractory materials are generally fabricated using traditional techniques such as arc melting, powder metallurgy, and magnetron sputtering. In this study, along with traditional production methods, additive manufacturing techniques which have revolutionized the manufacturing field are discussed concerning their applications in refractory material production. Additive manufacturing methods enable the achievement of high temperatures and the production of homogeneous, single-phase solid solutions, making them suitable for fabricating refractory materials with high melting points.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"70 ","pages":"Pages 87-124"},"PeriodicalIF":2.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167744","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}
Yanshu Shi , Mengke Guo , Yiqian Wang , Xuekun Wang , Jile Wang , Xiaoyun Qin , Yumin Song , Hai Wang , Xiaoyan Wang , Tingting Guo
{"title":"Reconstructed nano-titanyl phthalocyanine for high-performance photodetection","authors":"Yanshu Shi , Mengke Guo , Yiqian Wang , Xuekun Wang , Jile Wang , Xiaoyun Qin , Yumin Song , Hai Wang , Xiaoyan Wang , Tingting Guo","doi":"10.1016/j.cap.2025.01.016","DOIUrl":"10.1016/j.cap.2025.01.016","url":null,"abstract":"<div><div>With the rising demand for high-performance organic small-molecule semiconductor materials in optoelectronic devices, reconstructing specific morphologies of nano-phthalocyanines is of great significance. Herein, TiOPc ultrathin nanosheets (UNSs) and nanosheets (NSs) are reconstructed using a simple and effective physical vapor deposition (PVD) method. The thickness and lateral sizes of the UNSs are between 1 to 10 nm and 50–200 nm, respectively. The subsequent experimental results of photodetection exhibited that the photocurrent of UNSs/NSs is nearly four to five orders of magnitude higher than that of the raw materials at 10 V and show good stability. The photoresponsivity of the UNSs is about 3.37 × 10<sup>4</sup> times that of the raw materials, demonstrating good photoelectric conversion capability. Under different wavelengths, the photocurrents of the UNSs are consistently higher than those of the NSs and the raw materials. The NSs exhibit the fastest response speed, with rise and fall times of 194 ms and 193 ms, respectively, under 395 nm. Furthermore, the photoresponsive properties of the reconstructed UNSs and NSs are better than those of most other reported MPc materials. Our results indicate that TiOPc UNSs and NSs hold great application prospects in high-performance optoelectronic devices.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"72 ","pages":"Pages 11-17"},"PeriodicalIF":2.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143260827","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}
{"title":"Impact of Ni on the structure and electrochemical behavior of δ-MnO2 cathodes in zinc ion batteries","authors":"Mohamad Afiefudin , Asep Ridwan Setiawan , Fadli Rohman , Veinardi Suendo , Achmad Prayogi","doi":"10.1016/j.cap.2025.01.014","DOIUrl":"10.1016/j.cap.2025.01.014","url":null,"abstract":"<div><div>The utilization of MnO<sub>2</sub> as a cathode material in energy storage systems such as rechargeable aqueous zinc-ion batteries shows great promise for development due to its high safety, environmental friendliness, and cost-effectiveness. Nevertheless, the manganese dioxide cathode suffers from a dissolution-redeposition reaction, leading to poor structural stability. To address these issues, this study focuses on modifying the structural properties of <em>δ-</em>MnO<sub>2</sub> to overcome its drawbacks, such as low capacity and cycling stability. By synthesizing Ni-<em>δ-</em>MnO<sub>2</sub> with enhanced crystalline structure, expanded lattice spacing, improved conductivity, rapid diffusion of Zn<sup>2+</sup> ions, and electron transfer are enabled. This results in a notable high capacity of 350 mA h g<sup>−1</sup> at 50 mA g<sup>−1</sup>, accompanied by enduring cycle stability, with the capacity maintained over 200 cycles. The morphology evolution and structure of Ni- <em>δ-</em>MnO<sub>2</sub> are believed to enhance ion transportation, rendering it a promising cathode material for applications in aqueous zinc-ion batteries.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"72 ","pages":"Pages 18-27"},"PeriodicalIF":2.4,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349577","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}
Irfan Yahaya , Ahmad Nurhelmy Adam , Ahmad Adnan Abu Bakar , Shahino Mah Abdullah , Nizam Tamchek , Ahmad F. Alforidi , Ahmed Alahmadi , Mohd Ifwat Mohd Ghazali
{"title":"Design and fabrication of multi-band SRR sensors using 3D printing for liquid characterization","authors":"Irfan Yahaya , Ahmad Nurhelmy Adam , Ahmad Adnan Abu Bakar , Shahino Mah Abdullah , Nizam Tamchek , Ahmad F. Alforidi , Ahmed Alahmadi , Mohd Ifwat Mohd Ghazali","doi":"10.1016/j.cap.2025.01.018","DOIUrl":"10.1016/j.cap.2025.01.018","url":null,"abstract":"<div><div>A microstrip line split ring resonator (SRR) sensor is introduced for liquid profiling. The sensor features a microstrip transmission line with two identical SRRs, detecting differential permittivity by loading liquid samples onto the SRRs.3D-printing stereolithography technology with high temperature resin is used to build the sensors. The printed sensor undergoes metallization process by depositing titanium and copper layer, followed by copper electroplating. Different Ti Cu sputtering time was studied to determine optimum parameters for sensor application. It only necessitates a minimal sample volume for detection as any changes in the sample loading induces a change in the resonance frequency of the SRR. The sensors exhibited strong performance, distinguishing between chemicals like methanol, IPA, and silicone oil based on resonance frequency shifts, with the 3.5 GHz sensor achieving the highest sensitivity (1.09 %). The utilization of additive manufacturing for producing 3D-printed sensors could meet the demand for quick and cost-effective microwave sensors.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"72 ","pages":"Pages 93-104"},"PeriodicalIF":2.4,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453962","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}
{"title":"Sustainable synthesis of magnetic nanoparticles: Biological applications of Cedrus deodara extract","authors":"Shilpa Kumari , Mohit Sahni , Soumya Pandit , Neha Verma , Firdaus Mohamad Hamzah , Kuldeep Sharma , Kanu Priya","doi":"10.1016/j.cap.2025.01.015","DOIUrl":"10.1016/j.cap.2025.01.015","url":null,"abstract":"<div><div>This research article explains a green synthesis of α-Fe₂O₃ nanoparticles (NPs) utilizing <em>Cedrus deodara</em> wood extract. The wood extract of this medicinal plant was used to synthesize the α-Fe₂O₃ NPs and utilized in various applications including biological applications on Osteosarcoma (MG63) and Lung cancer (A549). Along with this, we have also estimated its anti-bacterial properties on <em>P. aeruginosa</em> bacterial strain. The α-Fe₂O₃ NPs showed high antioxidant activity with DPPH and FRAP values of 86.05 % and 86.04 %, outperforming the antioxidant capacity of <em>Cedrus deodara</em> extract alone (79.16 % and 71.09 %). In cytotoxicity tests, they effectively inhibited osteosarcoma (MG63) and lung carcinoma (A549) cell lines, showing greater cytotoxicity against MG63 cells (IC<sub>50</sub> of 19.86 μg/mL) than A549 cells (IC<sub>50</sub> of 24.66 μg/mL) after 24 h. They also displayed strong antibacterial activity. This work presents a novel biogenic α-Fe₂O₃ nanoparticle synthesized from <em>Cedrus deodara</em> extract, exhibiting exceptional antioxidant, cytotoxic, and antibacterial activities.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"72 ","pages":"Pages 1-10"},"PeriodicalIF":2.4,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093097","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}
Juanjuan Wang , Pengkang Ma , Qizhen Chai , Fusheng Lai , Hongliang Du , Li Jin , Zhanhui Peng , Xiaolian Chao , Tianyi Yang
{"title":"Sodium Tantalate doping-induced phase structure Regulation and electrical property enhancement in lead-free (Bi0.5Na0.5) 0.94Ba0.06TiO3 ceramics","authors":"Juanjuan Wang , Pengkang Ma , Qizhen Chai , Fusheng Lai , Hongliang Du , Li Jin , Zhanhui Peng , Xiaolian Chao , Tianyi Yang","doi":"10.1016/j.cap.2025.01.013","DOIUrl":"10.1016/j.cap.2025.01.013","url":null,"abstract":"<div><div>Ceramics with superior energy storage properties, serving as the dielectric layer of capacitors, are crucial for constructing high performance capacitors. In this study, we designed and characterized (1-<em>x</em>) (0.94Bi<sub>0.5</sub>Na<sub>0.5</sub>Ti0<sub>3</sub>-0.06BaTiO<sub>3</sub>)-<em>x</em>NaTaO<sub>3</sub> (BNBT-<em>x</em>NT) lead-free ceramics with enhanced energy storage capabilities. The incorporation of NaTaO<sub>3</sub> induced a transition from non-polar to polar relaxation phase and transformed nano-domains into nano-micro domains. Under an applied electric field of 250 kV/cm, the 0.92 BNBT-0.08NT ceramics exhibited significantly higher effective energy storage density <em>W</em><sub>rec</sub> (3.07 J/cm<sup>3</sup>) and energy storage efficiency <em>η</em> (68 %). Moreover, these ceramics demonstrated remarkable discharge energy density <em>W</em><sub>d</sub> (1.1 J/cm<sup>3</sup>), high power density <em>P</em><sub>D</sub> (75 MW/cm<sup>3</sup>), and fast charge and discharge speed <em>t</em><sub>0.9</sub> (258 ns). The exceptional stability in terms of energy storage performance suggests that BNBT-0.08NT ceramics hold great potential for pulse power applications.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"71 ","pages":"Pages 199-206"},"PeriodicalIF":2.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169210","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}
Mengmeng Chu , Junhan Bae , Maha Nur Aida , Hasnain Yousuf , Jaljalalul Abedin Jony , Rafi Ur Rahman , Muhammad Quddamah Khokhar , Sangheon Park , Junsin Yi
{"title":"Thermal curing of interface defects at a-si:H/c-Si in heterojunction with intrinsic thin layer (HIT) solar cell processing","authors":"Mengmeng Chu , Junhan Bae , Maha Nur Aida , Hasnain Yousuf , Jaljalalul Abedin Jony , Rafi Ur Rahman , Muhammad Quddamah Khokhar , Sangheon Park , Junsin Yi","doi":"10.1016/j.cap.2025.01.012","DOIUrl":"10.1016/j.cap.2025.01.012","url":null,"abstract":"<div><div>This study explores the use of thermal treatment to recover defects at the a-Si:H/c-Si interface caused by transparent conductive oxide (TCO) deposition, improving passivation by diminishing interface defect density (D<sub>it</sub>). A 200 °C thermal treatment enhanced HIT solar cell performance, increasing the effective bulk lifetime to 1.1 ms at a minority carrier density of 1.0 × 10<sup>1</sup>⁵ cm⁻³. Key performance metrics improved, including J<sub>sc</sub> (from 38.70 to 38.88 mA/cm<sup>2</sup>), V<sub>oc</sub> (from 727 to 730 mV), FF (from 75.50 % to 77.82 %), and efficiency (from 21.27 % to 22.09 %). AFORS-HET simulations showed that D<sub>it</sub> must be less than 1 × 10<sup>11</sup> cm⁻<sup>2</sup> eV⁻<sup>1</sup> for optimal efficiency. The best solar cell performance, achieved in simulations, included J<sub>sc</sub> of 37.71 mA/cm<sup>2</sup>, V<sub>oc</sub> of 716.8 mV, FF of 83.50 %, and efficiency of 22.57 % at D<sub>it</sub> of 1 × 10⁹ cm⁻<sup>2</sup> eV⁻<sup>1</sup>. This combined approach offers insights into defect management for solar cell technology.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"71 ","pages":"Pages 184-189"},"PeriodicalIF":2.4,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169208","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}