Journal of Science: Advanced Materials and Devices最新文献

{"title":"Lanthanide elements doped IZO semiconductor targets sputtered thin films as channel layers in high mobility thin film transistors","authors":"Bingxue Han ,&nbsp;Hua Xu ,&nbsp;Lijia Chen ,&nbsp;Chongyang Chen ,&nbsp;Bin Wu ,&nbsp;Lei Wang ,&nbsp;Zhijun Wang ,&nbsp;Benshuang Sun ,&nbsp;Jilin He","doi":"10.1016/j.jsamd.2025.100992","DOIUrl":"10.1016/j.jsamd.2025.100992","url":null,"abstract":"<div><div>Three novel rare-earth-doped indium-zinc oxide (RE-IZO) semiconductor targets, specifically PrIZO, NdIZO, and TbIZO, were synthesized via a defect-engineered sintering process. These targets were subsequently employed in magnetron sputtering to deposit high-mobility thin films, which functioned as channel layers in thin-film transistors (TFTs). Firstly, the mechanism of doping elements' influence on the phase regulation and grain refinement of these three targets during the densification process was systematically investigated, combined with first-principles calculations. The formation of PrInO₃ and NdInO₃ secondary phases during sintering significantly enhanced grain boundary migration resistance. This phenomenon stemmed from the significant mismatch in ionic radii between Pr³⁺ (0.99 Å)/Nd³⁺ (0.98 Å) and In³⁺(0.80 Å), which exceeded the mismatch in ionic radii between Tb³⁺ (0.92 Å) and In³⁺. The results showed that the densities of PrIZO and NdIZO targets were 99.7 % and 99.8 %, respectively, with grain sizes of 2.6 μm and 3.9 μm, and electrical conductivities of 2.2 mΩ cm and 5.2 mΩ cm, respectively, outperforming TbIZO target (density 95.1 %, grain size 4.4 μm, resistivity 8.1 mΩ cm). Subsequently, amorphous-structured, ultra-smooth-surface (R_a &lt; 0.5 nm), and highly uniform PrIZO, NdIZO, and the TbIZO transparent conductive films were prepared via optimized magnetron sputtering. As channel layers for thin-film transistors (TFTs), these films exhibit excellent electrical properties: <em>I</em>_on/<em>I</em>_off &gt;0.9, <em>μ</em>_sat &gt;21 cm²/V·s, threshold voltage &lt;2 V, and subthreshold swing &lt;0.3 V/dec. NdIZO TFTs exhibit the smallest threshold voltage shift (ΔV_th = 0.6 V) under positive bias stress (PBS), demonstrating excellent bias stability. The results showed that the better the overall performance of the targets, the better the performance of the TFT devices. This work provided an effective research strategy for developing channel layer materials for high-performance TFT devices.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 100992"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of structural and optoelectronic properties in dye-doped MC biopolymer films","authors":"Hawkar A. Mohammed ,&nbsp;Ismael I. Hussein ,&nbsp;Govar H. Hamasalih ,&nbsp;Ahmed G.S. Al-Azzawi ,&nbsp;Pshko A. Mohammed ,&nbsp;Sameerah I. Al-Saeedi ,&nbsp;Shujahadeen B. Aziz ,&nbsp;Jamal Hassan","doi":"10.1016/j.jsamd.2025.100968","DOIUrl":"10.1016/j.jsamd.2025.100968","url":null,"abstract":"<div><div>Biodegradable polymers modified with natural additives are gaining increasing attention for sustainable optoelectronic applications. In this work, a natural dye extracted from Cosmos sulphureus Cav. (CSC) flowers was incorporated into methylcellulose (MC) biopolymer films via a casting technique to enhance their optical properties. The dye-doped MC films were characterized to evaluate structural, morphological, and optical changes using established spectroscopic and imaging techniques. FTIR analysis confirmed strong hydrogen bonding between MC and CSC functional groups, primarily involving OH and NH groups. This interaction suggests good chemical compatibility and uniform dispersion of the dye within the polymer matrix. XRD results revealed an increased amorphous phase in doped samples, with a significant decrease in crystallinity, corroborated by a rise in Urbach energy from 0.327 to 0.463 eV. SEM imaging revealed distinct changes in surface morphology, with the dye-doped films exhibiting increased roughness and varied surface features compared to the smooth texture of the pristine MC, indicating effective dye incorporation and microstructural interaction. UV–Visible spectroscopy showed a red-shift in the absorption edge from 6.3 eV in pure MC to 2.24 eV in the highest doped sample (MCCS3), indicating effective band gap reduction. The refractive index increased from 1.15 to 1.18 with dye loading, indicating a denser optical medium and increased electronic polarizability. Simultaneously, the optical electronegativity decreased from 2.171 to 2.157, suggesting greater ease of electronic transitions. Optical dispersion parameters were analyzed using the Wemple-DiDomenico (WDD) model, oscillator energy (<span><math><mrow><msub><mi>E</mi><mi>o</mi></msub></mrow></math></span>) dropped from 6.26 to 2.63 eV and dispersion energy (<span><math><mrow><msub><mi>E</mi><mi>d</mi></msub></mrow></math></span>) from 1.54 to 0.71 eV. Other derived parameters such as effective mass, plasma frequency, mobility, and Verdet constants support the suitability of the films for optical limiting and magneto-optical applications. This study presents a novel, eco-friendly approach to tailoring the optical properties of biodegradable polymers, offering low-cost, sustainable solutions for future green technologies.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 100968"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145026856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbon Quantum Dot Derived from the Extracted Natural Dye of Hybrid Poplar Waste Leafs as an Original Progress to Enhance the Optical Properties of PVA Polymer: Solvothermal Synthesis and Spectroscopic Characterization","authors":"Krmanj R. Ali ,&nbsp;Dyari M. Mamand ,&nbsp;Ary R. Murad ,&nbsp;Ismael I. Huseen ,&nbsp;Dara M. Aziz ,&nbsp;Kawan F. Kayani ,&nbsp;Sameerah I. Al-Saeedi ,&nbsp;Shujahadeen B. Aziz ,&nbsp;Jamal Hassan","doi":"10.1016/j.jsamd.2025.101009","DOIUrl":"10.1016/j.jsamd.2025.101009","url":null,"abstract":"<div><div>This research demonstrates a green and facile single-step solvothermal method for the synthesis of carbon quantum dots (CQDs) using natural dye obtained from hybrid poplar (HP) leaf waste. The prepared CQDs were thoroughly characterized by FTIR, ¹H and ¹³C NMR, UV–Vis absorption, and fluorescence emission spectroscopies. These spectroscopic techniques confirm the presence of abundant functional groups (–OH, –COOH, –C=O) on the surface of CQDs. These CQDs were subsequently incorporated into a polyvinyl alcohol (PVA) matrix to fabricate nanocomposite films and examine their impact on the structural, optical, and optoelectronic properties of the PVA polymer. X-ray diffraction (XRD) analysis revealed a gradual reduction in the crystallinity of PVA with increasing CQD content, indicating a disruption of polymer chain ordering and the formation of more amorphous phases. The integration of CQDs induced a progressive red-shift in the absorption spectra and significantly reduced the direct optical bandgap from 6.35 to 2.87 eV and the indirect optical bandgap from 5.85 to 2.5 eV, as estimated from Tauc plots. The Wemple–DiDomenico (W-DD) single oscillator model further confirmed enhanced interband electronic transitions, as evidenced by an increase in dispersion energy (<em>E</em>_<em>d</em>) from 0.343 to 0.911 eV and a concurrent decrease in oscillator energy (<em>E</em>_<em>o</em>) from 5.817 to 2.601 eV with increasing CQD concentration. Furthermore, the nanocomposite films exhibited markedly improved nonlinear optical (NLO) performance. Third-order nonlinear susceptibility (χ³) increased by more than three orders of magnitude, from 9.74× 10⁻¹⁷ to 1.32 × 10⁻¹³ <em>esu</em>, while the nonlinear refractive index (<em>n2</em>) rose from 0.027 to 0.167. These results were accompanied by enhancements in dielectric constants, refractive index, plasma frequency (from 2.89 × 10¹⁵ to 3.78 × 10¹⁵ rad/s), effective carrier concentration (from 2.90 × 10⁵⁷ to 4.96 × 10⁵⁷), and Fermi energy (from 0.698 to 0.997 eV), indicating a significant modification in charge carrier dynamics and light–mater interactions within the PVA matrix.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101009"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145332703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced photocatalytic degradation of antibiotics and dye using flower-like BiOBrxI1-x solid solutions formed from self-assembled nanosheets","authors":"Shulan Pu ,&nbsp;Dongying Wang ,&nbsp;Xi Luo ,&nbsp;Yuhong Ding ,&nbsp;Jianglong Guo ,&nbsp;Yaxiong Li ,&nbsp;Jin Zhong Zhang ,&nbsp;Yan Sun","doi":"10.1016/j.jsamd.2025.101051","DOIUrl":"10.1016/j.jsamd.2025.101051","url":null,"abstract":"<div><div>Flower-like BiOBr_xI_1-x solid solutions with varying Br/I ratios were successfully prepared via a facile precipitation method. The photocatalytic performance was evaluated by degrading representative pollutants, including tetracycline (TC), oxytetracycline (OTC), and rhodamine B dye (RhB). All solid solutions exhibited enhanced activity compared to pure BiOBr and BiOI, and BiOBr_0.5I_0.5 demonstrated the highest degradation efficiencies of 81.7 %, 76.4 %, and 98.5 % for TC, OTC, and RhB within 30 min, respectively. The formation of a solid solution altered the band structure and provided multiple active sites for photocatalytic reaction, thus accelerating the separation of charge carriers. Moreover, the main active species were revealed through capture experiments and electron spin resonance tests.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101051"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145620593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel Z-scheme CoWO4/RGO/g-C3N4 photocatalyst for efficient visible-light-induced removal of organic pollutants","authors":"Dang Van Do ,&nbsp;Hung Van Tran ,&nbsp;Giang Dac Truong Nguyen ,&nbsp;Long Van Dang ,&nbsp;Son Thanh Le ,&nbsp;Khai Manh Nguyen ,&nbsp;Trang Thu Hoang ,&nbsp;Phuong Minh Nguyen","doi":"10.1016/j.jsamd.2025.101056","DOIUrl":"10.1016/j.jsamd.2025.101056","url":null,"abstract":"<div><div>A ternary CoWO₄/RGO/g-C₃N₄ photocatalyst was synthesized via a facile hydrothermal method for visible-light-driven degradation of the azo dye Direct Blue 71 (DB 71). Structural, morphological, and optical characterizations (XRD, FT-IR, SEM, EDS, UV–Vis DRS, and PL) confirmed the uniform incorporation of CoWO₄ and reduced graphene oxide (RGO) into the g-C₃N₄ framework, resulting in enhanced visible-light absorption and suppressed charge recombination through an RGO-mediated Type-II heterojunction. The optimized 0.1CoWO₄/RGO/g-C₃N₄ composite achieved 97 % degradation and 73 % TOC removal within 40 min, following pseudo-first-order kinetics (k = 0.08546 min^-1). Behnajady–Modirshahla–Ghanbary (BMG) modeling yielded b = 0.79875 min^-1 and m = 1.265, confirming high oxidative capacity. Photocatalytic activity was optimal at acidic to neutral pH and moderate catalyst dosage, with •OH and h⁺ identified as the dominant reactive species. The catalyst maintained 89 % efficiency after six cycles and achieved 54–74 % TOC removal in real urban surface waters from Hanoi. A preliminary techno-economic analysis estimated a production cost of 15–40 USD·kg^-1, underscoring its scalability and economic viability for sustainable wastewater treatment.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101056"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145620592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and analysis of 3D stacked nanosheet-based capacitorless DRAM with separated storage regions under process variations","authors":"Soo Bean Song ,&nbsp;Jin Park ,&nbsp;Won Suk Koh ,&nbsp;Gang San Yun ,&nbsp;Kyeong Min Lim ,&nbsp;Jaewon Jang ,&nbsp;Jin Hyuk Bae ,&nbsp;Sang Ho Lee ,&nbsp;Young Jun Yoon ,&nbsp;In Man Kang","doi":"10.1016/j.jsamd.2025.101047","DOIUrl":"10.1016/j.jsamd.2025.101047","url":null,"abstract":"<div><div>Conventional one-transistor–one-capacitor (1T–1C) dynamic random-access memory (DRAM) faces significant challenges in achieving high integration and cell-area scaling due to physical limitations in maintaining the size and shape of the cell capacitor. As device scaling progresses, securing sufficient capacitance becomes increasingly difficult, necessitating the fabrication of high–aspect-ratio capacitors. This requirement, in turn, increases process complexity and manufacturing cost. To address these limitations, this study proposes a gate-all-around (GAA) nanosheet (NS)–based capacitorless DRAM (1T-DRAM) structure, in which the current conduction path and the hole storage region are physically separated. The proposed device was evaluated through simulations that examined structural variations, such as taper angle and Si edge rounding induced by vertical stacking and etching, as well as electrical disturbances during memory array operation to assess device reliability. Simulation results indicate that smaller taper angles and increased Si edge rounding reduce the effective channel width, leading to an increased sensing margin (SM) but a decreased retention time (RT). This behavior is attributed to variations in stored hole density. The proposed structure also shows heightened sensitivity to taper angle variation, underscoring the importance of precise reactive-ion etching (RIE) control. Furthermore, under electrical array disturbance conditions, the proposed 1T-DRAM maintains stable operation, exhibiting variations of less than ±2 % in SM and ±6 % in RT, demonstrating its robustness. These findings highlight the potential of the proposed architecture for realizing highly integrated and reliable memory devices.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101047"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145575877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Salvia hydrangea-derived carbon quantum dots via sustainable synthesis: Unraveling physicochemical properties, biocompatibility, and biological efficacy","authors":"Mahsa Mardasi ,&nbsp;Mohammad Hossein Mirjalili ,&nbsp;Moones Rahmandoust ,&nbsp;Alireza Ghassempour ,&nbsp;Hosein Shahsavarani","doi":"10.1016/j.jsamd.2025.101028","DOIUrl":"10.1016/j.jsamd.2025.101028","url":null,"abstract":"<div><div>Carbon quantum dots (CQDs) are biocompatible, water-soluble nanoparticles with tunable photoluminescence properties. Their green synthesis from medicinal plants offers an eco-friendly and cost-effective approach while enabling surface functionalization with plant-derived bioactive compounds. <em>Salvia hydrangea</em> and its cell cultures have recently been reported as rich sources of rosmarinic acid. In this study, plant aerial parts and cell cultures (as renewable precursors) were employed for the first time to synthesize CQDs via a one-step hydrothermal method. The nanoparticles were characterized by FTIR, EDX, XRD, TEM, Zeta potential, and UV–Vis spectroscopy, and their antimicrobial, antioxidant, and cytotoxic activities were evaluated. The average size of CQDs synthesized from plant aerial parts (pCQDs) and cell cultures (cCQDs) was 3.7 ± 2.3 nm and 2.9 ± 1.9 nm, respectively, showing distinct particle size distributions. With abundant N-containing and O-rich groups on their surfaces, the CQDs exhibited good solubility in water. Moreover, zeta potential values for pCQDs (+15.7 mV) and cCQDs (−54.9 mV) indicated a significant difference in surface charge. Despite the higher colloidal stability and superior optical properties of cCQDs (QY = 8.3 %), pCQDs demonstrated stronger antibacterial activity, particularly against <em>Staphylococcus aureus</em>. pCQDs also showed greater free radical scavenging activity than Trolox. Both types of CQDs exhibited low cytotoxicity toward fibroblast cells and did not cause significant hemolytic effects in human red blood cells. These findings highlight the influence of different plant tissues on the physicochemical and biological properties of CQDs and suggest their diverse application potential.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101028"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145332701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanofibrous aerogels derived from electrospinning of PAN/UiO-66-NH2 for sound and thermal insulation","authors":"Hamidreza Younesi ,&nbsp;Majid Askari Sayar ,&nbsp;Seyed Reza Nabavi ,&nbsp;Saeid Nickabadi ,&nbsp;Hossein Rostami","doi":"10.1016/j.jsamd.2025.101045","DOIUrl":"10.1016/j.jsamd.2025.101045","url":null,"abstract":"<div><div>In general, porous materials make excellent choices for heat insulation and sound absorption. However, the broad use of porous materials is hampered by their limited mechanical stability, poor uniformity of performance, and low sound absorption coefficient below 1000 Hz. The PAN/UiO-66-NH₂ aerogel, a novel aerogel with intricately designed hierarchical and complex porosity structures, was synthesized in this work. This construction efficiently blocks the passage of heat and absorbs low-frequency sound. At 750 Hz, the PAN/UiO-66-NH₂ material's sound absorption coefficient reached 0.97, while at 250, 500, 750, and 1000 Hz, it averages 0.72. Additionally, PAN/UiO-66-NH₂ has a thermal conductivity of 26.21 mW m⁻¹ K⁻¹, which can be compared to air. Notably, the PAN/UiO-66-NH₂ aerogels exhibit strong and reliable cycling performance. With a water contact angle of 132.8°, the hydrophobic material provides exceptional moisture resistance. The benefits suggest that the composite nanofiber aerogel be a suitable choice for absorbing sound, insulating buildings and cars from heat, and reducing reverberation indoors.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101045"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145575876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gas sensors in harsh environments: Challenges and advances in high temperature, high humidity, radiative and corrosive conditions","authors":"Mohammad Fazlul Haque ,&nbsp;Seungman Park ,&nbsp;Daejong Yang","doi":"10.1016/j.jsamd.2025.101049","DOIUrl":"10.1016/j.jsamd.2025.101049","url":null,"abstract":"<div><div>Gas sensing in extreme environments is critical for ensuring safety and compliance across various industries, particularly in applications involving high temperatures, high humidity, radiation exposure, and corrosive atmospheres. In this article, we review recent and important research and their findings on different gas sensing technologies, especially for harsh environments. Five prominent gas sensor technologies—resistive, electrochemical, catalytic combustion, optical, and absorption-based gas sensors—are critically examined with a focus on their gas sensing performance in harsh environments. The effects of these harsh environments on sensing performance and recent progress in overcoming these effects are discussed. Other sensor system components that are susceptible to harsh environments, such as electronics, wiring, mounting fixtures, etc., are also discussed. By analyzing recent advancements and emerging trends in gas sensing and other related technologies, this work provides a comprehensive understanding of how these sensors and sensing systems can be optimized for reliable performance in an array of harsh environments.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101049"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145575883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A compact SNG-SRR Metamaterial sensor with enhanced sensitivity for biomedical applications","authors":"Md Shakhawat Hossen ,&nbsp;Mohammad Tariqul Islam ,&nbsp;Mohamad A. Alawad ,&nbsp;Abdulmajeed M. Alenezi ,&nbsp;Mohd Hafiz Baharuddin ,&nbsp;Yazeed Alkhrijah ,&nbsp;Mohamed Ouda ,&nbsp;Mohamed S. Soliman","doi":"10.1016/j.jsamd.2025.101044","DOIUrl":"10.1016/j.jsamd.2025.101044","url":null,"abstract":"<div><div>This paper presents a compact single-negative (SNG) split-ring resonator (SRR) metamaterial sensor developed for non-invasive wound dressing moisture monitoring. The sensor is fabricated on a Rogers RT5880 substrate (<span><math><mrow><msub><mrow><mi>ɛ</mi></mrow><mrow><mi>r</mi></mrow></msub><mo>=</mo><mn>2</mn><mo>.</mo><mn>2</mn></mrow></math></span>, <span><math><mrow><mo>tan</mo><mi>δ</mi><mo>=</mo><mn>0</mn><mo>.</mo><mn>009</mn></mrow></math></span>), occupies only <span><math><mrow><mn>25</mn><mo>×</mo><mn>20</mn><mspace></mspace><msup><mrow><mi>mm</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span>, and operates reliably within the 2.0–2.8 GHz band, exhibiting a sharp <span><math><mrow><mo>−</mo><mn>28</mn></mrow></math></span> dB transmission notch at 2.43 GHz. By exploiting epsilon-negative (ENG, <span><math><mrow><mi>ɛ</mi><mo>&lt;</mo><mn>0</mn></mrow></math></span>) behavior, the design achieves strong electromagnetic field confinement and a high surface current density of 98.8 A/m, enabling superior sensitivity and resonance selectivity compared to conventional SRR/CSRR sensors. The sensor’s performance was validated through both simulations and experiments using five wound dressing materials: (i) cotton gauze, (ii) hydrocolloid, (iii) polyurethane, (iv) alginate, and (v) hydrogel, under dry and soaked conditions. As the effective permittivity increased from <span><math><mrow><msub><mrow><mi>ɛ</mi></mrow><mrow><mi>r</mi></mrow></msub><mo>=</mo><mn>2</mn><mo>.</mo><mn>2</mn></mrow></math></span> (dry) to <span><math><mrow><msub><mrow><mi>ɛ</mi></mrow><mrow><mi>r</mi></mrow></msub><mo>=</mo><mn>18</mn><mo>.</mo><mn>0</mn></mrow></math></span> (20% blood concentration), the resonance frequency shifted from 2.43 GHz to 1.70 GHz, corresponding to a total shift of 0.73 GHz. This yielded normalized sensitivities ranging from 10.3% at 5% blood concentration to 30.0% at 20% blood concentration, with slope-based sensitivity peaking at 4.1%<span><math><mrow><mo>/</mo><mi>ɛ</mi></mrow></math></span> near 10% blood concentration. Importantly, the sensor maintained a Q-factor above 30 across all loading conditions, confirming its robustness and measurement reliability. Operating within the 2.0–2.8 GHz range, the proposed sensor offers high sensitivity, stability, and ease of integration. This breakthrough SRR design demonstrates strong potential for enhancing wound management by enabling efficient, real-time, and precise moisture monitoring.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101044"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145576360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}