Pub Date : 2025-12-01DOI: 10.1016/j.jsamd.2025.101051
Shulan Pu , Dongying Wang , Xi Luo , Yuhong Ding , Jianglong Guo , Yaxiong Li , Jin Zhong Zhang , Yan Sun
Flower-like BiOBrxI1-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 BiOBr0.5I0.5 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.
{"title":"Enhanced photocatalytic degradation of antibiotics and dye using flower-like BiOBrxI1-x solid solutions formed from self-assembled nanosheets","authors":"Shulan Pu , Dongying Wang , Xi Luo , Yuhong Ding , Jianglong Guo , Yaxiong Li , Jin Zhong Zhang , Yan Sun","doi":"10.1016/j.jsamd.2025.101051","DOIUrl":"10.1016/j.jsamd.2025.101051","url":null,"abstract":"<div><div>Flower-like BiOBr<sub>x</sub>I<sub>1-x</sub> 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<sub>0.5</sub>I<sub>0.5</sub> 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}
Pub Date : 2025-12-01DOI: 10.1016/j.jsamd.2025.101056
Dang Van Do , Hung Van Tran , Giang Dac Truong Nguyen , Long Van Dang , Son Thanh Le , Khai Manh Nguyen , Trang Thu Hoang , Phuong Minh Nguyen
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.
{"title":"A novel Z-scheme CoWO4/RGO/g-C3N4 photocatalyst for efficient visible-light-induced removal of organic pollutants","authors":"Dang Van Do , Hung Van Tran , Giang Dac Truong Nguyen , Long Van Dang , Son Thanh Le , Khai Manh Nguyen , Trang Thu Hoang , Phuong Minh Nguyen","doi":"10.1016/j.jsamd.2025.101056","DOIUrl":"10.1016/j.jsamd.2025.101056","url":null,"abstract":"<div><div>A ternary CoWO<sub>4</sub>/RGO/g-C<sub>3</sub>N<sub>4</sub> 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 CoWO<sub>4</sub> and reduced graphene oxide (RGO) into the g-C<sub>3</sub>N<sub>4</sub> framework, resulting in enhanced visible-light absorption and suppressed charge recombination through an RGO-mediated Type-II heterojunction. The optimized 0.1CoWO<sub>4</sub>/RGO/g-C<sub>3</sub>N<sub>4</sub> composite achieved 97 % degradation and 73 % TOC removal within 40 min, following pseudo-first-order kinetics (k = 0.08546 min<sup>-1</sup>). Behnajady–Modirshahla–Ghanbary (BMG) modeling yielded b = 0.79875 min<sup>-1</sup> 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<sup>+</sup> 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<sup>-1</sup>, 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}
Thermoelectric devices that facilitate the conversion of low-grade thermal gradients into electrical energy are increasingly recognized as essential elements for self-sustaining wearable electronics and autonomous Internet of Things (IoT) infrastructures. This review provides a comprehensive evaluation of recent advancements in thermoelectric materials, flexible device architectures, and system-level power management methodologies that have been documented over the past five years. Principal areas of emphasis encompass nanostructuring, band engineering, and defect modulation strategies that augment the thermoelectric figure of merit (ZT) and power factor under low-ΔT conditions. Innovations in conducting polymers, hybrid nanocomposites, and low-dimensional materials are underscored for their mechanical flexibility, stretchability, and compatibility with scalable processing techniques. Comparative assessments of benchmark materials, including Bi2Te3 alloys, SnSe, Poly(3,4-ethylenedioxythiophene) (PEDOT): poly(styrenesulfonate) (PSS), and Carbon nanotube (CNT)/polymer composites, are presented with direct correlations to device-level performance metrics relevant to wearable applications and distributed sensor networks. In addition to summarizing advancements, this review emphasizes that successful commercialization will depend on the coordinated optimization of high-ZT, low-toxicity materials, robust architectures, and ultra-low-power electronic systems. Challenges such as scalable synthesis, long-term thermomechanical reliability, and sustainable recycling practices are critically scrutinized. Furthermore, the review aligns prospective research trajectories with Sustainable and Affordable and Clean Energy by promoting battery-free, environmentally sustainable wearable and IoT technologies.
{"title":"Advances in thermoelectronic materials and devices for self-sustaining wearable and IoT systems","authors":"Beemkumar Nagappan , K. Kamakshi Priya , Kulmani Mehar , Praveen Priyaranjan Nayak , Shailesh Kumar , Mahit Jain , A. Shwetha , Aseel Samrat","doi":"10.1016/j.jsamd.2025.101059","DOIUrl":"10.1016/j.jsamd.2025.101059","url":null,"abstract":"<div><div>Thermoelectric devices that facilitate the conversion of low-grade thermal gradients into electrical energy are increasingly recognized as essential elements for self-sustaining wearable electronics and autonomous Internet of Things (IoT) infrastructures. This review provides a comprehensive evaluation of recent advancements in thermoelectric materials, flexible device architectures, and system-level power management methodologies that have been documented over the past five years. Principal areas of emphasis encompass nanostructuring, band engineering, and defect modulation strategies that augment the thermoelectric figure of merit (ZT) and power factor under low-ΔT conditions. Innovations in conducting polymers, hybrid nanocomposites, and low-dimensional materials are underscored for their mechanical flexibility, stretchability, and compatibility with scalable processing techniques. Comparative assessments of benchmark materials, including Bi<sub>2</sub>Te<sub>3</sub> alloys, SnSe, Poly(3,4-ethylenedioxythiophene) (PEDOT): poly(styrenesulfonate) (PSS), and Carbon nanotube (CNT)/polymer composites, are presented with direct correlations to device-level performance metrics relevant to wearable applications and distributed sensor networks. In addition to summarizing advancements, this review emphasizes that successful commercialization will depend on the coordinated optimization of high-ZT, low-toxicity materials, robust architectures, and ultra-low-power electronic systems. Challenges such as scalable synthesis, long-term thermomechanical reliability, and sustainable recycling practices are critically scrutinized. Furthermore, the review aligns prospective research trajectories with Sustainable and Affordable and Clean Energy by promoting battery-free, environmentally sustainable wearable and IoT technologies.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101059"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145620608","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}
Pub Date : 2025-12-01DOI: 10.1016/j.jsamd.2025.101061
Manal A. Awad , Awatif A. Hendi , Khalid M. Ortashi , Saad G. Alshammari , Hayat Althobaiti , Gul Naz , Fatimah Al-Abbas , Reema A. Alnamlah , Meshal Marzoog Al-Sharafa , Raghad M. Alsubaie , Nada M. Merghani , R. Ramadan , H.J. Elamin , Fahd Z. Eissa , Eram Eltahir , Maha M. Almoneef
This study reports the synthesis of a composite of lanthanum (La2O3)–zinc oxide nanoparticles (La-ZnONPs) using a simple and cost-effective co-precipitation method. The structural, morphological, compositional, and functional properties of the synthesized nanoparticles were systematically investigated. UV–visible spectroscopy revealed an excitonic absorption peak at ∼364 nm, and the optical band gap was calculated to be 2.9 ± 0.02 eV using the Kubelka–Munk method. Fourier-transform infrared (FTIR) spectroscopy indicated the vibrational modes of functional groups, with a prominent peak in the range of 3000–3600 cm−1 corresponding to the O–H bond, while the absence of additional significant absorption bands confirmed the high purity of the nanoparticles. Transmission electron microscopy (TEM) revealed their morphology, and energy-dispersive X-ray spectroscopy (EDX) confirmed the elemental composition. X-ray diffraction (XRD) analysis showed a hexagonal wurtzite structure with an average crystallite size of ∼15 ± 0.01 nm. Electrochemical characterization demonstrated that La-ZnO electrodes exhibited a specific capacitance (Cp) of 0.8064 ± 0.001 F/g at a scan rate of 0.01 V/s, which decreased to 0.3758 ± 0.01 F/g at higher scan rates due to reduced interaction time between the active material and electrolyte ions. The observed pseudocapacitive behavior was attributed to oxygen vacancies and La incorporation, which enhanced the overall capacitance. The anticancer potential of La-ZnONPs was evaluated against colon cancer, MDA-MB-231 breast cancer, and HeLa cervical cancer cell lines using the MTT assay. The nanoparticles exhibited significant cytotoxicity, with cell viabilities of 28.5 ± 0.12 %, 25 ± 0.15 %, and 30.2 ± 0.14 % for colon, MDA-MB-231, and HeLa cells, respectively, demonstrating effective cytotoxicity at relatively low concentrations and highlighting their potential as anticancer agents. Unlike previous studies on La-ZnO, which primarily focused on structural and optical properties, this work demonstrates the dual functionality of La-ZnONPs by systematically assessing both their electrochemical and anticancer activities. These findings underscore their biomedical relevance and potential application in energy storage, offering a unique combination of multifunctional properties for future technological and therapeutic developments.
{"title":"Optical and structural characteristics of La2O3-ZnO nanoparticles synthesized via the Co-precipitation technique: Potential for energy storage and biomedical applications","authors":"Manal A. Awad , Awatif A. Hendi , Khalid M. Ortashi , Saad G. Alshammari , Hayat Althobaiti , Gul Naz , Fatimah Al-Abbas , Reema A. Alnamlah , Meshal Marzoog Al-Sharafa , Raghad M. Alsubaie , Nada M. Merghani , R. Ramadan , H.J. Elamin , Fahd Z. Eissa , Eram Eltahir , Maha M. Almoneef","doi":"10.1016/j.jsamd.2025.101061","DOIUrl":"10.1016/j.jsamd.2025.101061","url":null,"abstract":"<div><div>This study reports the synthesis of a composite of lanthanum (La<sub>2</sub>O<sub>3</sub>)–zinc oxide nanoparticles (La-ZnONPs) using a simple and cost-effective co-precipitation method. The structural, morphological, compositional, and functional properties of the synthesized nanoparticles were systematically investigated. UV–visible spectroscopy revealed an excitonic absorption peak at ∼364 nm, and the optical band gap was calculated to be 2.9 ± 0.02 eV using the Kubelka–Munk method. Fourier-transform infrared (FTIR) spectroscopy indicated the vibrational modes of functional groups, with a prominent peak in the range of 3000–3600 cm<sup>−1</sup> corresponding to the O–H bond, while the absence of additional significant absorption bands confirmed the high purity of the nanoparticles. Transmission electron microscopy (TEM) revealed their morphology, and energy-dispersive X-ray spectroscopy (EDX) confirmed the elemental composition. X-ray diffraction (XRD) analysis showed a hexagonal wurtzite structure with an average crystallite size of ∼15 ± 0.01 nm. Electrochemical characterization demonstrated that La-ZnO electrodes exhibited a specific capacitance (Cp) of 0.8064 ± 0.001 F/g at a scan rate of 0.01 V/s, which decreased to 0.3758 ± 0.01 F/g at higher scan rates due to reduced interaction time between the active material and electrolyte ions. The observed pseudocapacitive behavior was attributed to oxygen vacancies and La incorporation, which enhanced the overall capacitance. The anticancer potential of La-ZnONPs was evaluated against colon cancer, MDA-MB-231 breast cancer, and HeLa cervical cancer cell lines using the MTT assay. The nanoparticles exhibited significant cytotoxicity, with cell viabilities of 28.5 ± 0.12 %, 25 ± 0.15 %, and 30.2 ± 0.14 % for colon, MDA-MB-231, and HeLa cells, respectively, demonstrating effective cytotoxicity at relatively low concentrations and highlighting their potential as anticancer agents. Unlike previous studies on La-ZnO, which primarily focused on structural and optical properties, this work demonstrates the dual functionality of La-ZnONPs by systematically assessing both their electrochemical and anticancer activities. These findings underscore their biomedical relevance and potential application in energy storage, offering a unique combination of multifunctional properties for future technological and therapeutic developments.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101061"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145690777","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}
Pub Date : 2025-12-01DOI: 10.1016/j.jsamd.2025.101067
Nadia Reza , Mohammad Rashed Iqbal Faruque , K.S. Al-mugren
A quatrefoil-loop-shaped metamaterial is designed in this paper to detect explosive gases in the C and X bands. It achieves three resonance frequencies at 6.5 GHz, 7.58 GHz, and 8.7 GHz with absorption rates of 99.9 %, 93.2 %, and 96.5 %, respectively. The absorber shows the same absorption at different polarization angles from 0° to 90° in both transverse electric (TE) and transverse magnetic (TM) modes. The absorber can sense explosive gases such as propane and butane. The sensitivity of the propane and butane is 0.47 GHz/RIU and 0.5 GHz/RIU with a quality factor of 130 and 216, respectively. The Figure of Merit values are 10 for propane and 16.67 for butane. The sensing occurs based on the refractive index. The design is based on a cost-effective FR-4 (lossy) dielectric substrate. The unit cell dimensions are 8 × 8 × 1.6 mm3. Analysis of surface current, electric fields, and magnetic fields confirms strong resonance at each band. Additionally, the design's equivalent circuit is modeled and validated in Advanced Design System (ADS). The fabricated design is measured, and the measurement results agree well with the simulated response.
{"title":"Quatrefoil-loop metamaterial absorber with polarization-independent and wide angular stable response for dual-band explosive gas sensing","authors":"Nadia Reza , Mohammad Rashed Iqbal Faruque , K.S. Al-mugren","doi":"10.1016/j.jsamd.2025.101067","DOIUrl":"10.1016/j.jsamd.2025.101067","url":null,"abstract":"<div><div>A quatrefoil-loop-shaped metamaterial is designed in this paper to detect explosive gases in the C and X bands. It achieves three resonance frequencies at 6.5 GHz, 7.58 GHz, and 8.7 GHz with absorption rates of 99.9 %, 93.2 %, and 96.5 %, respectively. The absorber shows the same absorption at different polarization angles from 0° to 90° in both transverse electric (TE) and transverse magnetic (TM) modes. The absorber can sense explosive gases such as propane and butane. The sensitivity of the propane and butane is 0.47 GHz/RIU and 0.5 GHz/RIU with a quality factor of 130 and 216, respectively. The Figure of Merit values are 10 for propane and 16.67 for butane. The sensing occurs based on the refractive index. The design is based on a cost-effective FR-4 (lossy) dielectric substrate. The unit cell dimensions are 8 × 8 × 1.6 mm<sup>3</sup>. Analysis of surface current, electric fields, and magnetic fields confirms strong resonance at each band. Additionally, the design's equivalent circuit is modeled and validated in Advanced Design System (ADS). The fabricated design is measured, and the measurement results agree well with the simulated response.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101067"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145690780","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}
Pub Date : 2025-12-01DOI: 10.1016/j.jsamd.2025.101058
Xu-Xiang Cai , Sheng-Jung Tsou , Chung-Kwei Lin , Ruey-Bin Yang , Wen-An Chiou , Hong-Ming Lin , Yuh-Jing Chiou
Lightweight radar absorbing materials (RAMs) play a crucial role in various applications requiring the absorption of electromagnetic radiation. Both large reflection loss and wide effective absorption bandwidth are key issues for RAMs. In the present study, facile and mass producible NiFe nanowires were prepared and inlaid with ZnS nanocrystals (5, 10, and 15 wt%) to improve their microwave absorption properties. The physical materials characteristics of the so-obtained ZnS/NiFe nanowires were examined using X-ray diffraction, scanning and transmission electron microscopy, and electron spectroscopy for chemical analysis, etc. Microwave absorber composites were prepared using 5 wt% optimal ZnS/NiFe nanowires and investigated to reveal their corresponding microwave absorption performance. The experimental results showed that (ZnS)10/(Ni1Fe99)90 (i.e., Ni1Fe99 NWs inlaid with 10 wt% ZnS nanocrystals) exhibited significant improvements in both microwave absorption characteristics (complex permeability and permittivity) and performance (reflection loss and effective absorption bandwidth, EAB). The minimum reflection loss was −50.32 dB at 17.60 GHz for a thickness of 1.5 mm, whereas EAB reached 7.59 GHz, ranging from 10.41 to 18.00 GHz for a 1.7 mm thickness. The superior enhancement in microwave absorption performance can be attributed to the synergistic effect of exchange resonance and dielectric polarization relaxation loss induced by the inlay of ZnS nanocrystals on Ni1Fe99 NWs.
{"title":"Superior enhancement in microwave absorption performance of NiFe nanowires inlaid with ZnS Nanocrystals: Synergistic effect of exchange resonance and dielectric polarization relaxation","authors":"Xu-Xiang Cai , Sheng-Jung Tsou , Chung-Kwei Lin , Ruey-Bin Yang , Wen-An Chiou , Hong-Ming Lin , Yuh-Jing Chiou","doi":"10.1016/j.jsamd.2025.101058","DOIUrl":"10.1016/j.jsamd.2025.101058","url":null,"abstract":"<div><div>Lightweight radar absorbing materials (RAMs) play a crucial role in various applications requiring the absorption of electromagnetic radiation. Both large reflection loss and wide effective absorption bandwidth are key issues for RAMs. In the present study, facile and mass producible NiFe nanowires were prepared and inlaid with ZnS nanocrystals (5, 10, and 15 wt%) to improve their microwave absorption properties. The physical materials characteristics of the so-obtained ZnS/NiFe nanowires were examined using X-ray diffraction, scanning and transmission electron microscopy, and electron spectroscopy for chemical analysis, etc. Microwave absorber composites were prepared using 5 wt% optimal ZnS/NiFe nanowires and investigated to reveal their corresponding microwave absorption performance. The experimental results showed that (ZnS)<sub>10</sub>/(Ni<sub>1</sub>Fe<sub>99</sub>)<sub>90</sub> (i.e., Ni<sub>1</sub>Fe<sub>99</sub> NWs inlaid with 10 wt% ZnS nanocrystals) exhibited significant improvements in both microwave absorption characteristics (complex permeability and permittivity) and performance (reflection loss and effective absorption bandwidth, EAB). The minimum reflection loss was −50.32 dB at 17.60 GHz for a thickness of 1.5 mm, whereas EAB reached 7.59 GHz, ranging from 10.41 to 18.00 GHz for a 1.7 mm thickness. The superior enhancement in microwave absorption performance can be attributed to the synergistic effect of exchange resonance and dielectric polarization relaxation loss induced by the inlay of ZnS nanocrystals on Ni<sub>1</sub>Fe<sub>99</sub> NWs.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101058"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145620594","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}
Pub Date : 2025-12-01DOI: 10.1016/j.jsamd.2025.101060
Md Saiful Islam , Fazliyana ‘Izzati Za'abar , Camellia Doroody , Sieh Kiong Tiong , Ahmad Wafi Mahmood Zuhdi , Kazi Sajedur Rahman , Zheng-Jie Feng , Nowshad Amin
This study investigates the influence of substrate temperature on the structural, optical, and electrical properties of MoS2 thin films deposited via radio-frequency (RF) magnetron sputtering. Films were grown at four substrate temperatures: room temperature (RT), 100 °C, 200 °C, and 300 °C. X-ray diffraction (XRD) and Raman spectroscopy revealed that increasing temperature enhanced crystallinity, reduced microstrain, and narrowed vibrational mode peaks, indicating thermally induced grain coarsening and reduced structural disorder. Field emission scanning electron microscopy (FESEM) showed a progression from irregular grains to more uniform and compact morphologies with elevated temperatures. Photoluminescence (PL) analysis identified both direct (∼1.83 eV) and indirect (∼1.63 eV) transitions, supporting the presence of multilayered domains and revealing enhanced optical quality at 200 °C. Electrical measurements indicated a trade-off between mobility and carrier concentration, with peak hole mobility (3.81 cm2/V·s) observed at 300 °C. These findings demonstrate that a sputtering temperature of 200 °C offers an optimal balance between crystallinity, electrical transport, and low structural disorder, making it ideal for integrating MoS2 thin films into high-performance optoelectronic devices.
{"title":"Thermal modulation of crystallinity and defect landscape in sputtered MoS2 thin films for optoelectronic applications","authors":"Md Saiful Islam , Fazliyana ‘Izzati Za'abar , Camellia Doroody , Sieh Kiong Tiong , Ahmad Wafi Mahmood Zuhdi , Kazi Sajedur Rahman , Zheng-Jie Feng , Nowshad Amin","doi":"10.1016/j.jsamd.2025.101060","DOIUrl":"10.1016/j.jsamd.2025.101060","url":null,"abstract":"<div><div>This study investigates the influence of substrate temperature on the structural, optical, and electrical properties of MoS<sub>2</sub> thin films deposited via radio-frequency (RF) magnetron sputtering. Films were grown at four substrate temperatures: room temperature (RT), 100 °C, 200 °C, and 300 °C. X-ray diffraction (XRD) and Raman spectroscopy revealed that increasing temperature enhanced crystallinity, reduced microstrain, and narrowed vibrational mode peaks, indicating thermally induced grain coarsening and reduced structural disorder. Field emission scanning electron microscopy (FESEM) showed a progression from irregular grains to more uniform and compact morphologies with elevated temperatures. Photoluminescence (PL) analysis identified both direct (∼1.83 eV) and indirect (∼1.63 eV) transitions, supporting the presence of multilayered domains and revealing enhanced optical quality at 200 °C. Electrical measurements indicated a trade-off between mobility and carrier concentration, with peak hole mobility (3.81 cm<sup>2</sup>/V·s) observed at 300 °C. These findings demonstrate that a sputtering temperature of 200 °C offers an optimal balance between crystallinity, electrical transport, and low structural disorder, making it ideal for integrating MoS<sub>2</sub> thin films into high-performance optoelectronic devices.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101060"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145620610","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}
Pub Date : 2025-12-01DOI: 10.1016/j.jsamd.2025.101052
Fabrizio Mariano , Mauro Leoncini , Luigi Carbone , Riccardo Scarfiello , Agostina Lina Capodilupo , Marco Pugliese , Alessandra Zizzari , Sonia Carallo , Eduardo Fabiano , Carmela Tania Prontera , Riccardo Manfredi , Antonio Maggiore , Giuseppe Gigli , Vincenzo Maiorano
The fabrication of OLEDs via fully solution-based techniques is a coveted advancement for large-area, high-luminance, and cost-effective organic light panels. A major challenge lies in preventing film dissolution or intermixing during multilayer deposition, especially when applying the electron transport layer (ETL) onto the emissive layer (EML).
This study explores the use of hydrophobic host: guest small-molecule systems in the EML, which are typically considered too fragile for successive solution processing. We demonstrate that an ETL can be deposited from a hydroalcoholic solution without damaging the EML, thanks to the hydrophobic nature of the materials used.
OLEDs were fabricated using both spin-coated and thermally evaporated ETLs to evaluate the performance. The best devices showed comparable results, reaching current efficiencies of ∼35 cd/A at 1000 cd/m2, with limited efficiency roll-off at higher luminance.
Importantly, FTIR analysis confirmed that residual water from the ETL solution is eliminated during annealing. Lifetime measurements under ambient conditions confirmed the robustness of the devices, with lifetimes of approximately 150 h from an initial luminance of 1000 cd/m2.
These results provide new insight into the potential of commercial small-molecules for high-performance, multilayer OLEDs fabricated entirely through solution-processing methods.
{"title":"Hydrophobic small-molecule emissive layers enabling fully solution-processed high-performance OLEDs","authors":"Fabrizio Mariano , Mauro Leoncini , Luigi Carbone , Riccardo Scarfiello , Agostina Lina Capodilupo , Marco Pugliese , Alessandra Zizzari , Sonia Carallo , Eduardo Fabiano , Carmela Tania Prontera , Riccardo Manfredi , Antonio Maggiore , Giuseppe Gigli , Vincenzo Maiorano","doi":"10.1016/j.jsamd.2025.101052","DOIUrl":"10.1016/j.jsamd.2025.101052","url":null,"abstract":"<div><div>The fabrication of OLEDs via fully solution-based techniques is a coveted advancement for large-area, high-luminance, and cost-effective organic light panels. A major challenge lies in preventing film dissolution or intermixing during multilayer deposition, especially when applying the electron transport layer (ETL) onto the emissive layer (EML).</div><div>This study explores the use of hydrophobic host: guest small-molecule systems in the EML, which are typically considered too fragile for successive solution processing. We demonstrate that an ETL can be deposited from a hydroalcoholic solution without damaging the EML, thanks to the hydrophobic nature of the materials used.</div><div>OLEDs were fabricated using both spin-coated and thermally evaporated ETLs to evaluate the performance. The best devices showed comparable results, reaching current efficiencies of ∼35 cd/A at 1000 cd/m<sup>2</sup>, with limited efficiency roll-off at higher luminance.</div><div>Importantly, FTIR analysis confirmed that residual water from the ETL solution is eliminated during annealing. Lifetime measurements under ambient conditions confirmed the robustness of the devices, with lifetimes of approximately 150 h from an initial luminance of 1000 cd/m<sup>2</sup>.</div><div>These results provide new insight into the potential of commercial small-molecules for high-performance, multilayer OLEDs fabricated entirely through solution-processing methods.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101052"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145620607","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}
The large-scale application of dye-sensitized solar cells (DSSCs) faces several challenges, primarily due to the degradation caused by the UV radiation. This degradation results in decreased stability and lower energy conversion efficiency. Due to its geographical location, Indonesia receives high levels of UV rays throughout the year, making it crucial to prevent degradation of DSSC cells.This study successfully explored a novel potential of zinc salicylate complex as a UV absorber material with superior characteristics and more eco-friendly than current materials. The complex formation, characteristics, performance, and mechanism of zinc salicylate as a UV absorber were investigated through experimental and computational studies. The findings indicate that both intraligand charge transfer (ILCT) and ligand-ligand charge transfer (LLCT) significantly influenced the UV-absorbing capacity of the zinc salicylate complex than the HOMO LUMO gap. Higher concentration of the metal complex enhances UV absorption ability while maintaining effective visible light transmission. The UV protection mechanism involves a fluorescence phenomenon, which transforms absorbed UV light into visible light that contributes to electricity generation in DSSCs
{"title":"Unlocking the UV-absorbing performance of zinc salicylate complex for dye-sensitized solar cells protection: A computational and experimental study","authors":"Harsasi Setyawati , Syafsir Akhlus , Irmina Kris Murwani","doi":"10.1016/j.jsamd.2025.101057","DOIUrl":"10.1016/j.jsamd.2025.101057","url":null,"abstract":"<div><div>The large-scale application of dye-sensitized solar cells (DSSCs) faces several challenges, primarily due to the degradation caused by the UV radiation. This degradation results in decreased stability and lower energy conversion efficiency. Due to its geographical location, Indonesia receives high levels of UV rays throughout the year, making it crucial to prevent degradation of DSSC cells.This study successfully explored a novel potential of zinc salicylate complex as a UV absorber material with superior characteristics and more eco-friendly than current materials. The complex formation, characteristics, performance, and mechanism of zinc salicylate as a UV absorber were investigated through experimental and computational studies. The findings indicate that both intraligand charge transfer (ILCT) and ligand-ligand charge transfer (LLCT) significantly influenced the UV-absorbing capacity of the zinc salicylate complex than the HOMO LUMO gap. Higher concentration of the metal complex enhances UV absorption ability while maintaining effective visible light transmission. The UV protection mechanism involves a fluorescence phenomenon, which transforms absorbed UV light into visible light that contributes to electricity generation in DSSCs</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101057"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145690781","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}
Pub Date : 2025-12-01DOI: 10.1016/j.jsamd.2025.101062
Songhua Zhang , Junchen Deng , Kuan Yew Cheong , Way Foong Lim
The effects of varying deposition time (15, 30, 45 and 60 min) towards terbium oxide (Tb4O7) by radio frequency (RF) magnetron sputtering were investigated as a high dielectric constant (k) film for silicon-based metal-oxide-semiconductor (MOS) capacitor and subjected to post-deposition annealing in nitrogen/nitrogen + oxygen/nitrogen (N2/N2+O2/N2) ambient. The incorporation of nitrogen into the oxygen vacancies inhibited further oxidation of the Si surface, diminishing the growth of the SiO2 interfacial layer (IL) by forming a nitrogen barrier layer. However, an excessive nitrogen accumulation occurred in the Tb4O7 film deposited for 15 min, leading to a degradation in interface quality. The increase of deposition time enhanced the total oxide thickness of the Tb4O7 film deposited for 30, 45, and 60 min, diminished gradually the adsorption and diffusion of nitrogen, and further triggered the interaction of oxygen and the Si substrate. Therefore, the interface quality was optimized with the reduction of interface trap density. The highest k value of 18 in this work was achieved by the Tb4O7 film deposited for 45 min, attributable to the optimized thickness of high-k Tb4O7 film and low k SiO2 IL at an appropriate nitrogen composition, the relatively high breakdown field (EB ∼ 2.25 MV/cm), as well as nearly the lowest interface trap density (Dit ∼ 3.57 × 1012 eV−1cm−2 at 0.40 eV), which proposed its potential as a high-k film for MOS devices. Corresponding effects were also systematically investigated by the physical and electrical properties of the Tb4O7 film at different deposition times in this work.
{"title":"Deposition-time-dependent structural and electrical characteristics of terbium oxide (Tb4O7) films for high-k MOS applications","authors":"Songhua Zhang , Junchen Deng , Kuan Yew Cheong , Way Foong Lim","doi":"10.1016/j.jsamd.2025.101062","DOIUrl":"10.1016/j.jsamd.2025.101062","url":null,"abstract":"<div><div>The effects of varying deposition time (15, 30, 45 and 60 min) towards terbium oxide (Tb<sub>4</sub>O<sub>7</sub>) by radio frequency (RF) magnetron sputtering were investigated as a high dielectric constant (k) film for silicon-based metal-oxide-semiconductor (MOS) capacitor and subjected to post-deposition annealing in nitrogen/nitrogen + oxygen/nitrogen (N<sub>2</sub>/N<sub>2</sub>+O<sub>2</sub>/N<sub>2</sub>) ambient. The incorporation of nitrogen into the oxygen vacancies inhibited further oxidation of the Si surface, diminishing the growth of the SiO<sub>2</sub> interfacial layer (IL) by forming a nitrogen barrier layer. However, an excessive nitrogen accumulation occurred in the Tb<sub>4</sub>O<sub>7</sub> film deposited for 15 min, leading to a degradation in interface quality. The increase of deposition time enhanced the total oxide thickness of the Tb<sub>4</sub>O<sub>7</sub> film deposited for 30, 45, and 60 min, diminished gradually the adsorption and diffusion of nitrogen, and further triggered the interaction of oxygen and the Si substrate. Therefore, the interface quality was optimized with the reduction of interface trap density. The highest k value of 18 in this work was achieved by the Tb<sub>4</sub>O<sub>7</sub> film deposited for 45 min, attributable to the optimized thickness of high-k Tb<sub>4</sub>O<sub>7</sub> film and low k SiO<sub>2</sub> IL at an appropriate nitrogen composition, the relatively high breakdown field (E<sub>B</sub> ∼ 2.25 MV/cm), as well as nearly the lowest interface trap density (D<sub>it</sub> ∼ 3.57 × 10<sup>12</sup> eV<sup>−1</sup>cm<sup>−2</sup> at 0.40 eV), which proposed its potential as a high-k film for MOS devices. Corresponding effects were also systematically investigated by the physical and electrical properties of the Tb<sub>4</sub>O<sub>7</sub> film at different deposition times in this work.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 4","pages":"Article 101062"},"PeriodicalIF":6.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145620595","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}
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