Textile functionalization gives textiles additional features beyond their basic attributes, aiming to enhance qualities that meet specific needs for various applications. This study covers the deposition of pure and aluminum-doped ZnO thin films on conductive and flexible textiles to study features such as self-cleaning, anti-bacterial, UV protection, and triboelectricity. Radio frequency magnetron sputtering was used to deposit pure and doped ZnO on the textile. A triboelectric nanogenerator (TENG) was fabricated by combining coated textiles with polyvinylidene fluoride (PVDF) nanofibers. The antibacterial activity of the samples was assessed against Gram-positive and Gram-negative bacteria by agar and broth diffusion methods. Methylene blue dye was used to examine the photocatalytic self-cleaning process. ZnO-coated textiles exhibit impressive performance in triboelectricity, self-cleaning, UV protection, and antibacterial activity. Moreover, all these properties were found to be enhanced with the doping of Al in ZnO.
{"title":"Textile functionalization with Al-doped ZnO: Integrating triboelectric nanogenerator, UV protection, self-cleaning, and antimicrobial features","authors":"P. Hajara , M.R. Shijeesh , C.C. Mohan , K.J. Saji","doi":"10.1016/j.cap.2026.01.005","DOIUrl":"10.1016/j.cap.2026.01.005","url":null,"abstract":"<div><div>Textile functionalization gives textiles additional features beyond their basic attributes, aiming to enhance qualities that meet specific needs for various applications. This study covers the deposition of pure and aluminum-doped ZnO thin films on conductive and flexible textiles to study features such as self-cleaning, anti-bacterial, UV protection, and triboelectricity. Radio frequency magnetron sputtering was used to deposit pure and doped ZnO on the textile. A triboelectric nanogenerator (TENG) was fabricated by combining coated textiles with polyvinylidene fluoride (PVDF) nanofibers. The antibacterial activity of the samples was assessed against Gram-positive and Gram-negative bacteria by agar and broth diffusion methods. Methylene blue dye was used to examine the photocatalytic self-cleaning process. ZnO-coated textiles exhibit impressive performance in triboelectricity, self-cleaning, UV protection, and antibacterial activity. Moreover, all these properties were found to be enhanced with the doping of Al in ZnO.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 145-153"},"PeriodicalIF":3.1,"publicationDate":"2026-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023373","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}
This study investigates how oxygen plasma treatment alters the properties of SnO2 and Mn2O3 nanoparticles and, in turn, influences the dielectric behavior of nematic liquid crystals. The findings show that the duration of plasma exposure plays a significant role in modifying particle size, morphology, and surface chemistry. XRD analysis confirm that the tetragonal structure of SnO2 and cubic structure of Mn2O3 remain intact, through both exhibit a slight decrease in crystallite size following treatment. SEM analysis reveals that plasma processing smoothens and compacts the surface of SnO2, whereas Mn2O3 undergoes partial surface etching and localized re-agglomeration, consistent with its higher reactivity. FTIR spectra indicate strengthened oxygen-related features and enhanced surface functionalization, which facilitate more pronounced interfacial polarization. Consequently, the liquid crystal doped with Mn2O3 nanoparticles reaches its maximum dielectric anisotropy after 14 min of plasma exposure. Overall, controlled plasma treatment can effectively tailor nanoparticle-liquid crystal interactions and enhance dielectric performance.
{"title":"Plasma-assisted engineering of structural and dielectric characteristics in oxide nanoparticle-doped liquid crystal composites","authors":"Mahsa Khadem Sadigh , Maryam Beigmohammadi , Aylar Daneshfar , Amid Ranjkesh","doi":"10.1016/j.cap.2026.01.002","DOIUrl":"10.1016/j.cap.2026.01.002","url":null,"abstract":"<div><div>This study investigates how oxygen plasma treatment alters the properties of SnO<sub>2</sub> and Mn<sub>2</sub>O<sub>3</sub> nanoparticles and, in turn, influences the dielectric behavior of nematic liquid crystals. The findings show that the duration of plasma exposure plays a significant role in modifying particle size, morphology, and surface chemistry. XRD analysis confirm that the tetragonal structure of SnO<sub>2</sub> and cubic structure of Mn<sub>2</sub>O<sub>3</sub> remain intact, through both exhibit a slight decrease in crystallite size following treatment. SEM analysis reveals that plasma processing smoothens and compacts the surface of SnO<sub>2</sub>, whereas Mn<sub>2</sub>O<sub>3</sub> undergoes partial surface etching and localized re-agglomeration, consistent with its higher reactivity. FTIR spectra indicate strengthened oxygen-related features and enhanced surface functionalization, which facilitate more pronounced interfacial polarization. Consequently, the liquid crystal doped with Mn<sub>2</sub>O<sub>3</sub> nanoparticles reaches its maximum dielectric anisotropy after 14 min of plasma exposure. Overall, controlled plasma treatment can effectively tailor nanoparticle-liquid crystal interactions and enhance dielectric performance.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 154-162"},"PeriodicalIF":3.1,"publicationDate":"2026-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023371","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}
Pub Date : 2026-01-07DOI: 10.1016/j.cap.2026.01.004
Wenning Shen , Yuxuan He , Aijun Yan , Yanfeng Ge , Zhiming Zhao , Zheng Liu
In this study, indium tin oxide (ITO) films with the thickness ranging from 95 to 380 nm were deposited by DC magnetron sputtering at 400 °C to systematically investigate the influence of film thickness on their photoelectrical properties. Within the 95–220 nm range, the crystals exhibited a preferential (400) orientation, which weakened beyond 220 nm. As the thickness increased, the electrical conductivity and NIR reflectance increased, while photovoltaic-band transmittance slighted decreased. The infrared isolation strengthened proportionally to film thickness. The 380 nm thick ITO film exhibited optimal performance, with an average transmittance of 83.12 % (400–1100 nm), an average reflectance of 59.72 % (1100–2500 nm), a sheet resistance of 3.67 Ω.sq−1, and a total reflected radiation power of 81.36 W m−2, along with a distinct cooling effect. Thickness adjustment allows for optimized solar spectrum selectivity, enabling effective solar radiation management without significantly compromising photovoltaic efficiency.
{"title":"Effects of film thickness on the optical properties and thermal management ability of DC magnetron sputtered ITO films with visible light transmission and near-infrared light reflection applied in photovoltaic cell","authors":"Wenning Shen , Yuxuan He , Aijun Yan , Yanfeng Ge , Zhiming Zhao , Zheng Liu","doi":"10.1016/j.cap.2026.01.004","DOIUrl":"10.1016/j.cap.2026.01.004","url":null,"abstract":"<div><div>In this study, indium tin oxide (ITO) films with the thickness ranging from 95 to 380 nm were deposited by DC magnetron sputtering at 400 °C to systematically investigate the influence of film thickness on their photoelectrical properties. Within the 95–220 nm range, the crystals exhibited a preferential (400) orientation, which weakened beyond 220 nm. As the thickness increased, the electrical conductivity and NIR reflectance increased, while photovoltaic-band transmittance slighted decreased. The infrared isolation strengthened proportionally to film thickness. The 380 nm thick ITO film exhibited optimal performance, with an average transmittance of 83.12 % (400–1100 nm), an average reflectance of 59.72 % (1100–2500 nm), a sheet resistance of 3.67 Ω.sq<sup>−1</sup>, and a total reflected radiation power of 81.36 W m<sup>−2</sup>, along with a distinct cooling effect. Thickness adjustment allows for optimized solar spectrum selectivity, enabling effective solar radiation management without significantly compromising photovoltaic efficiency.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 97-107"},"PeriodicalIF":3.1,"publicationDate":"2026-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922450","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}
Pub Date : 2026-01-06DOI: 10.1016/j.cap.2026.01.003
Eunmi Lee , Jong Yeog Son
Flexible ferroelectric and piezoelectric thin films are promising for next-generation wearable and flexible electronics. Here, we investigated the enhanced properties of poly(vinylidenefluoride-co-trifluoroethylene) (PVDF-TrFE) thin films by improving the crystallinity of (111)-oriented Pt bottom electrodes on mica substrates. The crystallinity of Pt was enhanced by lowering the deposition rate, which promoted the β-phase formation in PVDF-TrFE films. The flexible films exhibited a remanent polarization of about 9.2 μC/cm2 (2Pr ≈ 18.4 μC/cm2) and maintained stable polarization even at a bending radius of 2 mm. Furthermore, piezoelectric output voltages generated under periodic deformation were significantly improved with higher crystallinity of the Pt electrode. These results highlight that highly crystalline Pt bottom electrodes effectively enhance the ferroelectric and piezoelectric performance of PVDF-TrFE thin films, demonstrating their strong potential for wearable and flexible electronic applications.
{"title":"Enhanced piezoelectric power generation of flexible poly(vinylidenefluoride-co-trifluoroethylene) thin films deposited on Pt/mica substrates","authors":"Eunmi Lee , Jong Yeog Son","doi":"10.1016/j.cap.2026.01.003","DOIUrl":"10.1016/j.cap.2026.01.003","url":null,"abstract":"<div><div>Flexible ferroelectric and piezoelectric thin films are promising for next-generation wearable and flexible electronics. Here, we investigated the enhanced properties of poly(vinylidenefluoride-co-trifluoroethylene) (PVDF-TrFE) thin films by improving the crystallinity of (111)-oriented Pt bottom electrodes on mica substrates. The crystallinity of Pt was enhanced by lowering the deposition rate, which promoted the β-phase formation in PVDF-TrFE films. The flexible films exhibited a remanent polarization of about 9.2 μC/cm<sup>2</sup> (2P<sub>r</sub> ≈ 18.4 μC/cm<sup>2</sup>) and maintained stable polarization even at a bending radius of 2 mm. Furthermore, piezoelectric output voltages generated under periodic deformation were significantly improved with higher crystallinity of the Pt electrode. These results highlight that highly crystalline Pt bottom electrodes effectively enhance the ferroelectric and piezoelectric performance of PVDF-TrFE thin films, demonstrating their strong potential for wearable and flexible electronic applications.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 108-112"},"PeriodicalIF":3.1,"publicationDate":"2026-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922451","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}
This paper reports on the formation and study of Ag-Nb-N-O/TiO2 nanowires (NWs) for photocatalytic reduction of CO2. Firstly, the Ag-Nb-N-O thin film was grown by simultaneous magnetron sputtering of Ag and Nb targets in an atmosphere of Ar and N2. Subsequently, the Ag-Nb-N-O thin film was coated with TiO2 NWs, which were presynthesized by a hydrothermal method and then annealed at 500 °C. Before photocatalytic tests, the Ag-Nb-N-O/TiO2 NW samples were subjected to heat treatment at 350 °C. A morphology of the fresh and 350 °C-annealed Ag-Nb-N-O/TiO2 NWs was comprehensively studied by SEM, TEM, EDXS, and XRD. Heating was found to facilitate the extrusion of Ag particles from the bulk of the Ag-Nb-N-O film to its surface. In addition, the heat treatment led to partial evaporation of silver and its further redeposition on the surface of TiO2 NWs in the form of Ag nanoparticles. The Ag-Nb-N-O/TiO2 NWs subjected to the 350 °C heating possessed a remarkable photocatalytic activity in the synthesis of methanol from CO2, which was 3 times over that of the pure TiO2 NWs. This is associated with the contribution of localized surface plasmon resonance of Ag particles to generation of the charge carriers. Moreover, we demonstrate that LSPR-induced heating of Ag nanoparticles, confirmed by IR imaging, plays a crucial role in charge carrier separation. The thermoelectromotive force generated by the temperature gradient facilitates electron transfer from TiO2 to Ag, thereby improving CO2 reduction efficiency. Additionally, we revealed that an external electric field enables an improvement of the Ag-Nb-N-O/TiO2 NW photocatalytic activity providing an additional increase in the methanol yield by 60 %.
本文报道了用于光催化还原CO2的Ag-Nb-N-O/TiO2纳米线的形成和研究。首先，在氩气和氮气气氛中，用磁控溅射同时制备Ag-Nb- n - o薄膜。然后，在Ag-Nb-N-O薄膜上包覆TiO2 NWs，通过水热法预合成TiO2 NWs，然后在500℃下退火。在光催化测试之前，将Ag-Nb-N-O/TiO2 NW样品在350℃下进行热处理。采用SEM、TEM、EDXS、XRD等手段对新鲜和350℃退火后的Ag-Nb-N-O/TiO2 NWs的形貌进行了全面研究。发现加热有利于银颗粒从Ag- nb - n - o薄膜的主体向其表面挤压。此外，热处理导致银的部分蒸发，并以Ag纳米粒子的形式进一步沉积在TiO2 NWs表面。经过350℃加热的Ag-Nb-N-O/TiO2 NWs对CO2合成甲醇具有显著的光催化活性，是纯TiO2 NWs的3倍。这与银粒子的局部表面等离子体共振对载流子产生的贡献有关。此外，我们证明了lsr诱导的银纳米颗粒加热，通过红外成像证实，在电荷载流子分离中起着至关重要的作用。温度梯度产生的热电动势促进了TiO2向Ag的电子转移，从而提高了CO2还原效率。此外，我们发现外加电场可以提高Ag-Nb-N-O/TiO2 NW的光催化活性，使甲醇收率提高60%。
{"title":"Effect of LSPR, temperature and electric field on reduction of CO2 in H2O vapor using photocatalytic TiO2-nanowires with Ag nanoparticles extruded from Ag-Nb-N-O film","authors":"Larisa Sorokina , Andrey Tarasov , Daria Dronova , Alexey Trifonov , Sergey Itskov , Aleksey Tregubov , Ekaterina Zhurina , Hanna Bandarenka , Sergey Dubkov , Dmitry Kozlov , Dmitry Gromov","doi":"10.1016/j.cap.2026.01.001","DOIUrl":"10.1016/j.cap.2026.01.001","url":null,"abstract":"<div><div>This paper reports on the formation and study of Ag-Nb-N-O/TiO<sub>2</sub> nanowires (NWs) for photocatalytic reduction of CO<sub>2</sub>. Firstly, the Ag-Nb-N-O thin film was grown by simultaneous magnetron sputtering of Ag and Nb targets in an atmosphere of Ar and N<sub>2</sub>. Subsequently, the Ag-Nb-N-O thin film was coated with TiO<sub>2</sub> NWs, which were presynthesized by a hydrothermal method and then annealed at 500 °C. Before photocatalytic tests, the Ag-Nb-N-O/TiO<sub>2</sub> NW samples were subjected to heat treatment at 350 °C. A morphology of the fresh and 350 °C-annealed Ag-Nb-N-O/TiO<sub>2</sub> NWs was comprehensively studied by SEM, TEM, EDXS, and XRD. Heating was found to facilitate the extrusion of Ag particles from the bulk of the Ag-Nb-N-O film to its surface. In addition, the heat treatment led to partial evaporation of silver and its further redeposition on the surface of TiO<sub>2</sub> NWs in the form of Ag nanoparticles. The Ag-Nb-N-O/TiO<sub>2</sub> NWs subjected to the 350 °C heating possessed a remarkable photocatalytic activity in the synthesis of methanol from CO<sub>2</sub>, which was 3 times over that of the pure TiO<sub>2</sub> NWs. This is associated with the contribution of localized surface plasmon resonance of Ag particles to generation of the charge carriers. Moreover, we demonstrate that LSPR-induced heating of Ag nanoparticles, confirmed by IR imaging, plays a crucial role in charge carrier separation. The thermoelectromotive force generated by the temperature gradient facilitates electron transfer from TiO<sub>2</sub> to Ag, thereby improving CO<sub>2</sub> reduction efficiency. Additionally, we revealed that an external electric field enables an improvement of the Ag-Nb-N-O/TiO<sub>2</sub> NW photocatalytic activity providing an additional increase in the methanol yield by 60 %.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 119-129"},"PeriodicalIF":3.1,"publicationDate":"2026-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973640","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}
Pub Date : 2026-01-03DOI: 10.1016/j.cap.2025.12.021
V.K. Haripriya, Aneesh George, K.A. Malini
Nickel manganite (NiMn2O4) is a versatile mixed metal oxide widely used as an NTC thermistor in industrial and domestic applications requiring precise temperature sensing. Nickel manganite with inverse spinel (AB2O4) structure can be synthesized using methods such as solid-state reaction, sol-gel, hydrothermal, and co-precipitation techniques. Adding elements like Cu, Co, Fe, Zn, or Mg in varying amounts can further modify its electrical properties. This work examines cobalt substituted Ni-Mn oxides of composition Ni1-xCoxMn2O4 (0 ≤ x ≤ 0.6) synthesized via solid-state reaction and sol-gel auto-combustion methods, comparing their structural and electrical properties. XRD and FTIR confirmed nanosized samples with a cubic spinel structure for both methods. Electrical studies demonstrated NTC behaviour, with resistivity varying based on cobalt content. Dielectric studies revealed a decrease in dielectric constant with frequency and an increase with temperature. The findings indicate the significant influence of synthesis methods on the structural and electrical characteristics of the materials.
{"title":"Effect of synthesis route on the structural and electrical properties of Co substituted Ni-Mn oxide based NTC thermistors","authors":"V.K. Haripriya, Aneesh George, K.A. Malini","doi":"10.1016/j.cap.2025.12.021","DOIUrl":"10.1016/j.cap.2025.12.021","url":null,"abstract":"<div><div>Nickel manganite (NiMn<sub>2</sub>O<sub>4</sub>) is a versatile mixed metal oxide widely used as an NTC thermistor in industrial and domestic applications requiring precise temperature sensing. Nickel manganite with inverse spinel (AB<sub>2</sub>O<sub>4</sub>) structure can be synthesized using methods such as solid-state reaction, sol-gel, hydrothermal, and co-precipitation techniques. Adding elements like Cu, Co, Fe, Zn, or Mg in varying amounts can further modify its electrical properties. This work examines cobalt substituted Ni-Mn oxides of composition Ni<sub>1-x</sub>Co<sub>x</sub>Mn<sub>2</sub>O<sub>4</sub> (0 ≤ x ≤ 0.6) synthesized via solid-state reaction and sol-gel auto-combustion methods, comparing their structural and electrical properties. XRD and FTIR confirmed nanosized samples with a cubic spinel structure for both methods. Electrical studies demonstrated NTC behaviour, with resistivity varying based on cobalt content. Dielectric studies revealed a decrease in dielectric constant with frequency and an increase with temperature. The findings indicate the significant influence of synthesis methods on the structural and electrical characteristics of the materials.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 88-96"},"PeriodicalIF":3.1,"publicationDate":"2026-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922449","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}
Pub Date : 2026-01-02DOI: 10.1016/j.cap.2025.12.020
Jaewook Lim , Juhee Jeon , Yunwoo Shin , Jeongyun Oh , Hyojoo Heo , Kyoungah Cho , Sangsig Kim
Ternary half adders have emerged as representative building blocks for ternary arithmetic operations, which can efficiently process large amounts of data. In this paper, we present a ternary half adder by cascading reconfigurable logic-in-memory (R-LIM) cells that perform both CONS and ANY logic functions in the same cell configuration. Each R-LIM cell is composed of eight triple-gated feedback field-effect transistors (TG FBFETs) reconfigured in n- or p-channel modes. In a R-LIM cell, the CONS and ANY gates operate with low average power consumption of 0.03 and 3.85 nW, respectively, owing to TG FBFETs exhibiting low current levels (∼10−12 A) at a control gate voltage of 0 V in both the n- and p-channel modes. Furthermore, the ternary half adder retained the logic output during the hold operation for 10 ms under zero-bias conditions. The ternary half adder proposed in this study demonstrates the potential of ternary logic elements in data-intensive applications.
{"title":"Ternary half adder comprising reconfigurable triple-gated feedback field-effect transistors","authors":"Jaewook Lim , Juhee Jeon , Yunwoo Shin , Jeongyun Oh , Hyojoo Heo , Kyoungah Cho , Sangsig Kim","doi":"10.1016/j.cap.2025.12.020","DOIUrl":"10.1016/j.cap.2025.12.020","url":null,"abstract":"<div><div>Ternary half adders have emerged as representative building blocks for ternary arithmetic operations, which can efficiently process large amounts of data. In this paper, we present a ternary half adder by cascading reconfigurable logic-in-memory (R-LIM) cells that perform both CONS and ANY logic functions in the same cell configuration. Each R-LIM cell is composed of eight triple-gated feedback field-effect transistors (TG FBFETs) reconfigured in <em>n</em>- or <em>p</em>-channel modes. In a R-LIM cell, the CONS and ANY gates operate with low average power consumption of 0.03 and 3.85 nW, respectively, owing to TG FBFETs exhibiting low current levels (∼10<sup>−12</sup> A) at a control gate voltage of 0 V in both the <em>n</em>- and <em>p</em>-channel modes. Furthermore, the ternary half adder retained the logic output during the hold operation for 10 ms under zero-bias conditions. The ternary half adder proposed in this study demonstrates the potential of ternary logic elements in data-intensive applications.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 81-87"},"PeriodicalIF":3.1,"publicationDate":"2026-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922448","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}
Pub Date : 2025-12-27DOI: 10.1016/j.cap.2025.12.017
Doyel Rakshit, Ajay Kumar Ghosh
We have investigated transport properties of polycrystalline YBa2Cu3O (YBCO) superconductors containing tin (Sn) nanoparticles in the intergranular region. The normal state resistivity of YBCO with 2.0 wt.% of Sn at 300 K increases 2.35 times in comparison to that of the pure YBCO. The addition of Sn nanoparticles at several weight percentages has significantly influenced the transport critical current density () in YBCO. Using the Ambegaokar-Halperin-Nelson-Siggia (AHNS) theory, we have extracted superfluid phase stiffness () as a function of temperature (). The variation of in relation to has also been examined within the vicinity of the phase transition region. Additionally, the behavior of has been discussed by considering the and flux pinning mechanisms.
{"title":"Variation of critical current density with superfluid phase stiffness in composite system of YBCO and Sn-nanoparticles","authors":"Doyel Rakshit, Ajay Kumar Ghosh","doi":"10.1016/j.cap.2025.12.017","DOIUrl":"10.1016/j.cap.2025.12.017","url":null,"abstract":"<div><div>We have investigated transport properties of polycrystalline YBa<sub>2</sub>Cu<sub>3</sub>O<span><math><msub><mspace></mspace><mrow><mn>7</mn><mo>−</mo><mi>δ</mi></mrow></msub></math></span> (YBCO) superconductors containing tin (Sn) nanoparticles in the intergranular region. The normal state resistivity of YBCO with 2.0 wt.% of Sn at 300 K increases 2.35 times in comparison to that of the pure YBCO. The addition of Sn nanoparticles at several weight percentages has significantly influenced the transport critical current density (<span><math><msub><mi>J</mi><mrow><mrow><mtext>c</mtext></mrow></mrow></msub></math></span>) in YBCO. Using the Ambegaokar-Halperin-Nelson-Siggia (AHNS) theory, we have extracted superfluid phase stiffness (<span><math><msub><mi>J</mi><mrow><mrow><mtext>s</mtext></mrow></mrow></msub></math></span>) as a function of temperature (<span><math><mi>T</mi></math></span>). The variation of <span><math><msub><mi>J</mi><mrow><mrow><mtext>c</mtext></mrow></mrow></msub><mo>(</mo><mi>T</mi><mo>)</mo></math></span> in relation to <span><math><msub><mi>J</mi><mrow><mrow><mtext>s</mtext></mrow></mrow></msub><mo>(</mo><mi>T</mi><mo>)</mo></math></span> has also been examined within the vicinity of the phase transition region. Additionally, the behavior of <span><math><msub><mi>J</mi><mrow><mrow><mtext>c</mtext></mrow></mrow></msub><mo>(</mo><mi>T</mi><mo>)</mo></math></span> has been discussed by considering the <span><math><mi>δ</mi><msub><mi>T</mi><mrow><mrow><mtext>c</mtext></mrow></mrow></msub></math></span> and <span><math><mi>δ</mi><mi>l</mi></math></span> flux pinning mechanisms.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 113-118"},"PeriodicalIF":3.1,"publicationDate":"2025-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922352","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}
Pub Date : 2025-12-26DOI: 10.1016/j.cap.2025.12.011
T. Krishnapriya , Adon Jose , Arya Gopinath , Cyriac Joseph , P.R. Biju
A series of novel green light emitting NaKLa(1-x)NbO5: x Tb3+ (x = 0.00–0.10) phosphors with higher activator critical concentration were synthesized by solid state reaction method and its structural, morphological and luminescence properties have been investigated. Under 287 nm excitation, the titled phosphors exhibited a strong green emission. The addition of the Tb3+ concentration greatly improved the photoluminescent properties of the present phosphors without undergoing any quenching till the maximum concentration in the series (x = 0.10). The varying Tb3+concentrations did not have much influence on the CIE coordinates of the NaKLaNbO5 phosphors. This monotonous increase in intensity without much alterations in color properties is a desirable character for non-color tunable applications. The NaKLa(1-x)NbO5: x Tb3+ phosphors with strong green emission are expected to have wide applications in white light LEDs and non-tunable displays to compensate the green gap in the field of luminescent materials.
采用固相反应方法合成了一系列具有较高激活剂临界浓度的新型绿光发光体NaKLa(1-x)NbO5: x Tb3+ (x = 0.000 ~ 0.10)，并对其结构、形态和发光性能进行了研究。在287 nm激发下，标题荧光粉表现出较强的绿色发光。Tb3+浓度的加入大大改善了所述荧光粉的光致发光性能，而在该系列的最大浓度（x = 0.10）之前没有发生任何猝灭。不同的Tb3+浓度对NaKLaNbO5荧光粉的CIE坐标没有太大影响。这种单调的强度增加没有太多改变的颜色属性是一个理想的特性，非颜色可调的应用。具有强绿色发光特性的NaKLa(1-x)NbO5: x Tb3+荧光粉有望在白光led和不可调谐显示器中得到广泛应用，以弥补发光材料领域的绿色缺口。
{"title":"Luminescent properties of terbium doped NaKLaNbO5 phosphors for green light emitting applications","authors":"T. Krishnapriya , Adon Jose , Arya Gopinath , Cyriac Joseph , P.R. Biju","doi":"10.1016/j.cap.2025.12.011","DOIUrl":"10.1016/j.cap.2025.12.011","url":null,"abstract":"<div><div>A series of novel green light emitting NaKLa<sub>(1-x)</sub>NbO<sub>5</sub>: x Tb<sup>3+</sup> (x = 0.00–0.10) phosphors with higher activator critical concentration were synthesized by solid state reaction method and its structural, morphological and luminescence properties have been investigated. Under 287 nm excitation, the titled phosphors exhibited a strong green emission. The addition of the Tb<sup>3+</sup> concentration greatly improved the photoluminescent properties of the present phosphors without undergoing any quenching till the maximum concentration in the series (x = 0.10). The varying Tb<sup>3+</sup>concentrations did not have much influence on the CIE coordinates of the NaKLaNbO<sub>5</sub> phosphors. This monotonous increase in intensity without much alterations in color properties is a desirable character for non-color tunable applications. The NaKLa<sub>(1-x)</sub>NbO<sub>5</sub>: x Tb<sup>3+</sup> phosphors with strong green emission are expected to have wide applications in white light LEDs and non-tunable displays to compensate the green gap in the field of luminescent materials.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 62-67"},"PeriodicalIF":3.1,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145882054","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}
The ferromagnetism in Cu doped Zinc oxide (ZnO) has been investigated and the possible origin of magnetism in the system has been discussed. The Cu doped ZnO has been successfully prepared by solid state reaction method. Magnetization measurement of these Cu doped ZnO samples show ferromagnetic behavior at room temperature. Room temperature Photoluminescence spectroscopy measurements shows defect related blue emission peak together with the UV emission. Employing positron annihilation spectroscopy all the Cu doped and undoped ZnO samples has been characterized. Positron annihilation lifetime results suggest no significant increase of cation defect in Cu doped ZnO.
{"title":"Preparation and characterization of ferromagnetic Cu doped ZnO","authors":"Mahuya Chakrabarti , Apurba Kumar Nayek , Bidyut Haldar , Sudipta Moshat , Dirtha Sanyal","doi":"10.1016/j.cap.2025.12.018","DOIUrl":"10.1016/j.cap.2025.12.018","url":null,"abstract":"<div><div>The ferromagnetism in Cu doped Zinc oxide (ZnO) has been investigated and the possible origin of magnetism in the system has been discussed. The Cu doped ZnO has been successfully prepared by solid state reaction method. Magnetization measurement of these Cu doped ZnO samples show ferromagnetic behavior at room temperature. Room temperature Photoluminescence spectroscopy measurements shows defect related blue emission peak together with the UV emission. Employing positron annihilation spectroscopy all the Cu doped and undoped ZnO samples has been characterized. Positron annihilation lifetime results suggest no significant increase of cation defect in Cu doped ZnO.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 75-80"},"PeriodicalIF":3.1,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922447","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}
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