Current Applied Physics最新文献

{"title":"A facile planar memristor based on CsBi4Te6 with asymmetric metal contacts","authors":"Chayuan Zeng ,&nbsp;liwen Fan ,&nbsp;Sen Zhang ,&nbsp;Jiasheng Wang ,&nbsp;Tianqi Cheng ,&nbsp;Wanqian Wang ,&nbsp;Fei Xie ,&nbsp;Wei Luo ,&nbsp;Gang Peng","doi":"10.1016/j.cap.2025.04.003","DOIUrl":"10.1016/j.cap.2025.04.003","url":null,"abstract":"<div><div>A facile planar memristor was fabricated by choosing CsBi₄Te₆ (CBT) contacted with handmade asymmetric electrodes for the first time. Utilizing simple methods such as dispensing silver (Ag) paste and pressing indium (In) significantly streamline the electrode fabrication process. The planar memristor displays stable bipolar resistive switching (RS) capabilities over 100 cycles. the resistance ratio (<em>R</em>_OFF/<em>R</em>_ON) surpasses 10³, and its retention time at ambient temperature exceeds 10⁴ s. Comparative experiments reveal that the memristor behavior stems from the interface between CBT and Ag, with the possibility of a thin functional layer forming at the contact interface. Furthermore, characterizations at lower temperatures confirm the occurrence of carrier tunneling at the interface, which offers a fresh perspective and insight into the memristor.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"74 ","pages":"Pages 61-66"},"PeriodicalIF":2.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143851764","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":"Progress of terahertz nonlinearities on graphene plasmonic structures","authors":"Jeong Woo Han","doi":"10.1016/j.cap.2025.03.012","DOIUrl":"10.1016/j.cap.2025.03.012","url":null,"abstract":"<div><div>As graphene is patterned into micron-sized periodic structures, i.e., plasmonic structures, the carriers in graphene can be induced by the collective oscillation in response to incident terahertz (THz) light, known as localized plasmon. Utilizing this phenomenon, light-matter interactions can be significantly enhanced at the plasmon frequency and therefore the strongest light-matter frequency can be tailored in the THz frequency range by manipulating ω_p. Consequently, various types of THz nonlinearities have been reported on graphene plasmonic structures. In this review, we discuss the progress of research on the THz nonlinearities emerging in graphene plasmonic structures. Firstly, we introduce THz nonlinearities reported in the graphene sheet. In the later part, we discuss the recently reported two types of THz nonlinearities, i.e., thermal and plasmonic nonlinearities, emerging on the graphene plasmonic structure and its application.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"74 ","pages":"Pages 44-53"},"PeriodicalIF":2.4,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823694","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":"Nafion edge passivation and nitrogen annealing treatment to improve solar cell reliability under light and elevated temperature induced degradation (LeTID) investigation","authors":"Jaljalalul Abedin Jony ,&nbsp;Hasnain Yousuf ,&nbsp;Muhammad Quddamah Khokhar ,&nbsp;Muhammad Aleem Zahid ,&nbsp;Polgampola Chamani Madara ,&nbsp;Rafi Ur Rahman ,&nbsp;Alamgeer ,&nbsp;Mengmeng Chu ,&nbsp;Simpy Sanyal ,&nbsp;Fucheng Wang ,&nbsp;Youngkuk Kim ,&nbsp;Kyesoo Kim ,&nbsp;Suresh Kumar Dhungel ,&nbsp;Sangheon Park ,&nbsp;Junsin Yi","doi":"10.1016/j.cap.2025.04.002","DOIUrl":"10.1016/j.cap.2025.04.002","url":null,"abstract":"<div><div>This research examines the effectiveness of nitrogen annealing and Nafion treatment in mitigating Light and Elevated Temperature Induced Degradation (LeTID) in Passivated Emitter and Rear Contact (PERC) solar cells, employing a 30-kW photovoltaic (PV) system for evaluation. As a photosensitive device, solar cells are susceptible to damage from laser irradiation, leading to reduced photoelectric conversion efficiency, structural damage, and functional loss. To minimize this loss, nitrogen annealing and Nafion treatments were applied, followed by the analysis of LeTID effects on untreated, Nafion-treated, and combined nitrogen-annealed and Nafion-treated PERC cells. Untreated cells showed an 8 % fall in open-circuit voltage (V_oc) and a 7 % fill factor (FF) loss. The combined treatment (Combination of Nitrogen &amp; Nafion Treatment) improved stability, reducing losses to 6 % in V_oc and 5 % in FF. The Nafion treatment yielded the best results, limiting deterioration to 4 % in V_oc and 3 % in FF. PVsyst simulations, incorporating real-world data, confirmed enhanced stability and efficiency, aiding in optimizing PV system design and maintenance.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"75 ","pages":"Pages 1-7"},"PeriodicalIF":2.4,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873331","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":"Highly-enhanced microwave absorption of Fe@CNTs/PrFeO3 composites from conductive CNTs and magnetic Fe nanoparticles","authors":"Y.L. Cao ,&nbsp;Y. Tian ,&nbsp;B. Hong ,&nbsp;J.C. Xu ,&nbsp;Y.M. Song ,&nbsp;X.L. Peng ,&nbsp;H.W. Chen ,&nbsp;S. Qiu ,&nbsp;X.Q. Wang","doi":"10.1016/j.cap.2025.04.001","DOIUrl":"10.1016/j.cap.2025.04.001","url":null,"abstract":"<div><div>The Fe@CNTs/PrFeO₃ composites were synthesized via chemical vapor deposition (CVD) using PrFeO₃ nanoparticles as catalysts, which facilitated the simultaneous formation of Fe nanoparticles and growth of carbon nanotubes (CNTs) on the PrFeO₃ surface, with both processes exhibiting time-dependent enhancement under prolonged CVD duration. These composites demonstrate exceptional microwave absorption (MA) performance, particularly sample S2 (2 min CVD) which achieves an optimal minimum reflection loss of −53.25 dB at 6.56 GHz with 4 mm thickness, attributable to synergistic effects between the constituent materials. The outstanding performance stems from three primary mechanisms: (1) multi-component effects including enhanced multi-interface scattering/refraction from heterogeneous structures and optimized impedance matching that promotes efficient microwave penetration and dissipation; (2) CNTs-induced dielectric loss through strong dipole/interface polarization and conductive loss from the percolating network; and (3) Fe nanoparticle-mediated magnetic loss via natural resonance, exchange resonance, and eddy current effects at elevated frequencies. This unique combination of dielectric and magnetic loss mechanisms, coupled with favorable impedance matching, accounts for the superior MA properties of the Fe@CNTs/PrFeO₃ composites.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"74 ","pages":"Pages 34-43"},"PeriodicalIF":2.4,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800233","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":"One-pot synthesis of size-controlled Fe3O4 microclusters: Preserving superparamagnetism at microscale","authors":"Thi-Hien Pham ,&nbsp;Van Thanh Hoang ,&nbsp;Lemma Teshome Tufa ,&nbsp;Jaebeom Lee ,&nbsp;Doan Van Huong ,&nbsp;Van Tan Tran ,&nbsp;Van-Tuan Hoang ,&nbsp;Anh-Tuan Le","doi":"10.1016/j.cap.2025.03.013","DOIUrl":"10.1016/j.cap.2025.03.013","url":null,"abstract":"<div><div>Superparamagnetic nanoparticles (NPs) have gained significant attention for their unique properties and applications, but facile and scalable synthesis combining their superparamagnetic traits with the stability of larger particles remains challenging. This study presents a novel one-pot solvothermal method for synthesizing size-tunable Fe₃O₄ microclusters that preserve superparamagnetic properties at the microscale. We systematically investigated the effects of reaction time and surfactant type on the formation and characteristics of these microclusters, achieving precise size control ranging from 0.37 to 1.8 μm. Through detailed analysis of intermediate products and final structures, we elucidated the growth mechanism, revealing a clear clustering process of primary nanocrystals into larger spherical microclusters. This study introduces a versatile and novel approach to controlling the properties of Fe₃O₄ microclusters, bridging the gap between nanoscale and microscale superparamagnetic materials. This research not only offers a versatile approach to tailoring Fe₃O₄ microcluster properties for specific applications but also contributes to the broader understanding of size-controlled synthesis of magnetic materials.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"74 ","pages":"Pages 25-33"},"PeriodicalIF":2.4,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747252","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":"Photoluminescence and electrochemical studies of Ce3+-doped Zn2V2O7 nanoparticles synthesized via green route","authors":"Vinuta ,&nbsp;H.C. Manjunatha ,&nbsp;Y.S. Vidya ,&nbsp;S. Manjunatha ,&nbsp;R. Munirathnam ,&nbsp;M. Shivanna ,&nbsp;Suman Kumar ,&nbsp;K.N. Sridhar","doi":"10.1016/j.cap.2025.03.008","DOIUrl":"10.1016/j.cap.2025.03.008","url":null,"abstract":"<div><div>Zn₂V₂O₇:Ce Nanoparticles (NPs) (ZV:Ce), are produced by a solution combustion process mediated by an extract from <span><math><mi>M</mi><mi>e</mi><mi>n</mi><mi>t</mi><mi>h</mi><mi>a</mi><mi>s</mi><mi>p</mi><mi>i</mi><mi>c</mi><mi>a</mi><mi>t</mi><mi>a</mi></math></span> leaves. The diffraction pattern shows alignment with the ZV host matrix. The crystals grown with monoclinic crystal structure and <span><math><mi>C</mi><mn>2</mn><mo>/</mo><mi>c</mi><mo>(</mo><mn>2</mn><mo>/</mo><mi>m</mi><mo>)</mo></math></span> space group. Furthermore, as the dopant concentration changes, a shift in the diffraction pattern was noticed. Scherrer's approach yielded a crystallite size that nearly matched the results of transmission electron microscopy research. The surface morphology changes from irregularly shaped NPs to hexagonal ones. Furthermore, a modulation of E_<em>g</em> is shown by Tauc's plot analysis of the UV-visible absorption spectra, which shifts from 2.98 to 2.87 eV with increasing dopant quantity. The PL emission spectra at 310 nm consist of peaks located at 417, 457, 482 and 526 nm. The emission peaks at 417, 457 and 482 nm belong to the 5D_3/2 → ²F_7/2 transition and 526 nm can be attributed to the 5D_3/2 → ²F_7/2 transition of Ce³⁺ within the host matrix. The CIE coordinates fall in the light blue emission region. The average CCT of 9078 K shows a cooler appearance. From all these results, the present nano phosphor materials might be a promising candidate in blue LEDs and in display technology. The materials showing a cooler appearance find applications in museums, galleries, offices, outdoor lighting, etc. Electrochemical studies revealed that super capacitance values ranged from 94.67 to 158.12 F/g at a scan rate of 10 mV/s, with increasing Ce³⁺ quantity in Zn₂V₂O₇ nanoparticles.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"74 ","pages":"Pages 1-11"},"PeriodicalIF":2.4,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696858","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":"Influence of Sr content on the microstructure, mechanical properties, and electrical conductivity of Al-Si-Mg alloy","authors":"Eun Chan Ko ,&nbsp;Byeong Kwon Lee ,&nbsp;Hyo Sang Yoo ,&nbsp;Yong Ho Kim ,&nbsp;Hyeon Taek Son ,&nbsp;Kwangmin Lee","doi":"10.1016/j.cap.2025.03.011","DOIUrl":"10.1016/j.cap.2025.03.011","url":null,"abstract":"<div><div>This study investigates the impact of varying Sr content on the microstructure, mechanical properties, and electrical conductivity of Al-Si-Mg alloys. Alloys were cast and extruded at 450 °C, and both as-cast and extruded samples were analyzed. Up to 0.25 wt% Sr led to the formation of a spherical AlSi₂Sr₂ phase, enhancing tensile strength to 144 MPa due to precipitation hardening. Higher Sr contents (0.5 wt% and above) formed Al₄Sr intermetallic compounds, reducing tensile strength. Electrical conductivity was minimally affected by Sr content, but extruded samples showed over 20 % higher conductivity than as-cast samples, with the best performance at 0.25 wt% Sr. This improvement is linked to reduced casting defects and a more homogeneous microstructure after extrusion. The study suggests that optimizing Sr content and processing can enhance the properties of Al-Si-Mg alloys.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"74 ","pages":"Pages 54-60"},"PeriodicalIF":2.4,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850577","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":"Synthesis and characterization of single crystal and polycrystalline La3Ni2O7-δ","authors":"Noor ul Ain ,&nbsp;Saqlain Yousuf ,&nbsp;Zi-Yu Cao ,&nbsp;Anir S. Sharbirin ,&nbsp;Afrizal L. Fadli ,&nbsp;Jeongyong Kim ,&nbsp;Yongmin Kim ,&nbsp;Hanoh Lee ,&nbsp;Tuson Park","doi":"10.1016/j.cap.2025.03.009","DOIUrl":"10.1016/j.cap.2025.03.009","url":null,"abstract":"<div><div>Recent observation of superconductivity in La₃Ni₂O_{7-<em>δ</em>} have sparked renewed interest in high-temperature superconductors. Despite years of research, challenges with existing samples have raised questions about their intrinsic features, demanding on exploring new synthesis routes on this material. In this study, single crystals of La₃Ni₂O_{7-<em>δ</em>} were grown using CsCl flux for the first time, while polycrystalline synthesis was explored through solid-state reaction. The electrical resistivity of the polycrystalline samples showed an insulating behavior, whereas the single crystals exhibited metallic behavior with an anomaly at <em>T</em>∗ ∼110 K, likely due to a density wave order. A distinct V-shaped magnetoresistance is observed at temperatures below <em>T</em>∗ in a single crystal sample. Furthermore, Raman spectroscopy of the single crystals highlights prominent phonon modes, reflecting the complex bilayer structure of La₃Ni₂O_{7-<em>δ</em>}. These findings emphasized a new synthesis route for La₃Ni₂O_{7-<em>δ</em>} and highlight the influence of synthesis conditions on its magnetic and electronic properties.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"74 ","pages":"Pages 19-24"},"PeriodicalIF":2.4,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143735115","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":"Electronic properties of bilayer graphene/Janus MoSTe heterostructure","authors":"Junho Yun,&nbsp;Dongchul Sung,&nbsp;Yunjae Kim,&nbsp;Suklyun Hong","doi":"10.1016/j.cap.2025.03.010","DOIUrl":"10.1016/j.cap.2025.03.010","url":null,"abstract":"<div><div>A notable feature of 2D materials is their ability to form van der Waals heterostructures, enabling tailored electronic properties. Among these, Janus TMDs, with their asymmetric structure and dipole moment, exhibit unique properties like piezoelectricity, Rashba effect, and catalytic activity. In this study, we have performed density functional theory (DFT) calculations to investigate the electronic properties of a heterostructure composed of bilayer graphene (BLG) and a Janus MoSTe monolayer, focusing on the difference in interfacial contact behaviors between them. Our calculations indicate that the Dirac cone in BLG within the BLG/Janus MoSTe heterostructure opens due to electron transfer at the metal-semiconductor interface and the electric field generated by the asymmetry of Janus MoSTe. Depending on the contact orientation, this interaction results in BLG's bandgaps of 46 meV and 70 meV, respectively, highlighting the tunability and potential applications of BLG/Janus TMD heterostructures in optoelectronic devices.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"74 ","pages":"Pages 12-18"},"PeriodicalIF":2.4,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714479","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":"Fire-resistant layered carbon composite panels from used cotton cloth for thermal insulation and EMI shielding applications","authors":"Raji S,&nbsp;K. Prabhakaran","doi":"10.1016/j.cap.2025.03.007","DOIUrl":"10.1016/j.cap.2025.03.007","url":null,"abstract":"<div><div>A process for preparing thermally insulating carbon composite panels (CCP) from used cotton cloth is reported. The pliable cotton cloth is transformed into rigid carbon grid sheets by carbonization after impregnation with a sucrose solution. The layered carbon composite panels are obtained by hand layup of phenol-formaldehyde (PF) polymer solution-impregnated carbon grid sheet followed by curing and carbonization. The carbon composite panels exhibit grid-like pores in the X-Y plane and lamellar-type pores in the lateral plane. Due to their layered structure, the carbon composite panels exhibit pseudo-plastic failure under flexural mode. The density, compressive strength, and flexural strength are modulated in the ranges of 0.45 ± 0.0004 to 0.57 ± 0.0068 g cm⁻³, 0.86 ± 0.04 to 2.03 ± 0.10 MPa, and 2.6 ± 0.11 to 4.5 ± 0.16 MPa, respectively, by varying the PF solution concentrations from 60 to 100 vol%. The carbon composite panels exhibit oxidation resistance up to 470 °C, excellent fire resistance, and low thermal conductivity in the 0.187 ± 0.0004 to 0.273 ± 0.0014 W m⁻¹. K⁻¹ range. The high EMI shielding effectiveness in the range of 40–67 dB exhibited by the carbon composite panels of 5 mm thickness is due to the conductive and dielectric losses and multiple internal reflections within the grid-like and lamellar-type pores.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"73 ","pages":"Pages 117-126"},"PeriodicalIF":2.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654735","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}