Materials Research Bulletin最新文献

{"title":"X-Ray induced luminescence and catalytic radiosensitization of terbium-doped LaPO4 nanoparticles decorated with Ru, Pd, and Au","authors":"Santiago Bermudez,&nbsp;Carlos Blank,&nbsp;Carlos E. Castano,&nbsp;Joao S. Soares,&nbsp;Jessika V. Rojas","doi":"10.1016/j.materresbull.2025.113728","DOIUrl":"10.1016/j.materresbull.2025.113728","url":null,"abstract":"<div><div>This work explores the synthesis, characterization, and optimization of the radioluminescent response of LaPO₄ nanoparticles doped with terbium and decorated with ruthenium (Ru), palladium (Pd), and gold (Au) as potential radiosensitizers. The nanoparticles were synthesized via a co-precipitation method and modified through deposition-precipitation followed by chemical reduction. Surface modification drastically influenced luminescence quenching and catalytic performance. The radioluminescent response of the decorated nanoparticles showed notable quenching due to surface migration, whereas tests using methylene blue confirmed an enhancement in the radiocatalytic response, particularly with Au decoration. Moreover, using core-shell nanostructures was observed to potentially decrease energy migration to the surface, preventing surface quenching. Cytotoxicity assays indicated minimal toxicity, and in some cases, cell growth stimulation was observed, underscoring the potential of these nanomaterials for theragnostic applications in cancer treatment.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113728"},"PeriodicalIF":5.7,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912639","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":"Split-disk metamaterial with tunable polarization ratio for optical logic operation application","authors":"Junle Li,&nbsp;Daoye Zheng,&nbsp;Yunche Zhu,&nbsp;Yu-Sheng Lin","doi":"10.1016/j.materresbull.2025.113738","DOIUrl":"10.1016/j.materresbull.2025.113738","url":null,"abstract":"<div><div>Terahertz (THz) metamaterials hold promise for advanced communication and sensing applications, yet achieving high polarization selectivity and functional integration remains challenging. Here, we propose a tunable split-disk resonator (SDR) to address these challenges. This is an excellent demonstration of THz metamaterial that achieves both ultra-high polarization ratio and programmable logic gates solely through geometric tuning, without relying on phase-change materials, external biasing, or hybrid substrates. By synergistically adjusting the SDR height (<em>h</em>) and rotation angle (<em>θ</em>), the structure achieves the high polarization ratio (PR &gt; 3579) at 0.79 THz under the conditions of <em>h</em> = 5 µm and <em>θ</em> = 180°, outperforming prior metamaterials by more than two orders of magnitude. Furthermore, with fixed 90°, SDR devices enable polarization-state encoding for THz logic operations, realizing reconfigurable inverting, XNOR, and buffer gates at 0.60 THz, 0.66 THz, and 0.73 THz, respectively. Numerical simulations reveal that logic functionality arises from transmission intensity thresholds (50 %) defined by structural parameters and polarization inputs. This work pioneers a new approach for integrating photonic logic and polarization filtering in a single THz metamaterial, offering a reconfigurable and fabrication-ready route toward all-optical computing systems.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113738"},"PeriodicalIF":5.7,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144878492","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":"Boosted photoresponse and broadened spectral range of GaN through SnSe2/GaN heterostructure","authors":"Preeti Goswami ,&nbsp;Vishesh Mann ,&nbsp;Pukhraj Prajapat ,&nbsp;Govind Gupta","doi":"10.1016/j.materresbull.2025.113736","DOIUrl":"10.1016/j.materresbull.2025.113736","url":null,"abstract":"<div><div>Among two-dimensional materials, SnSe₂ is the most suitable material for integration with GaN for broadband absorption and self-powered operation due to its unique bandgap. When integrated with GaN, the resulting heterostructure can suppress dark current while maintaining high photocurrent levels. Recent advancements in self-powered broadband photodetectors have shown significant progress, but the photo-sensing capabilities of SnSe₂/GaN heterojunction remain unexplored. This work synthesized a SnSe₂/GaN heterostructure via a radio frequency sputtering technique and fabricated a metal-semiconductor-metal type device design using thermal evaporation. The sputtered SnSe₂ film generates an intrinsic electric field, enabling self-powered functionality. The developed SnSe₂/GaN heterostructure photodetector demonstrated an enhanced photoresponse and expanded spectral range of GaN but also exhibited a self-powered response even for weak optical signals. The device exhibited a responsivity of 3794 mA W^-1/7066 mAW^-1/5876 mAW^-1 and a noise-equivalent power of 4.04 × 10^–13 WHz^-1/2 / 2.17 × 10^–13 WHz^-1/2 / 2.60 × 10^–13 WHz^-1/2 for UV/Visible/NIR optical signals of weak power density 150 µW/mm² at 0.5 V bias. This study offers a straightforward method for developing a self-powered, broadband photodetector capable of detecting weak optical signals.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113736"},"PeriodicalIF":5.7,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892325","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":"Sea urchin-like nickel cobaltite for enhanced chlorine evolution reaction activity","authors":"Sushma Kumari,&nbsp;Sapna Devi,&nbsp;Menaka Jha","doi":"10.1016/j.materresbull.2025.113739","DOIUrl":"10.1016/j.materresbull.2025.113739","url":null,"abstract":"<div><div>The chlorine evolution reaction (CER) plays a vital role in the chemical industry, yet most CER electrocatalysts depend on scarce and costly elements like ruthenium and iridium. Developing efficient, sustainable, and cost-effective catalysts using abundant elements is essential to advance eco-friendly electrochemical technologies for chlorine production. Nickel cobaltite (NiCo₂O₄) stands out as a promising CER catalyst due to its availability, affordability, and favourable electrochemical properties. This study investigates a novel sea urchin-like NiCo₂O₄ nanostructure as a catalyst to enhance CER performance. Electrochemical analysis reveals that the nanostructure achieves a low overpotential of 140 mV at 10 mA cm^-2, a Tafel slope of 69 mV dec⁻¹, and an electrochemically active surface area of 593 cm². These findings highlight NiCo₂O₄ excellent catalytic activity, stability, and efficiency in chlorine evolution, offering insights for the rational design and optimization of NiCo₂O₄-based catalysts for scalable CER applications in industrial processes.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113739"},"PeriodicalIF":5.7,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895612","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":"Fe0.7Ni0.3/Ni(OH)2 nanosheet arrays electrodeposited on nickel foam for alkaline oxygen evolution reaction","authors":"Huihui Li,&nbsp;Qianqian Zhu,&nbsp;Sijia Liu,&nbsp;Shifeng Li,&nbsp;Qingqing Zha,&nbsp;Yonghong Ni","doi":"10.1016/j.materresbull.2025.113734","DOIUrl":"10.1016/j.materresbull.2025.113734","url":null,"abstract":"<div><div>Hydrogen energy, as an ideal alternative to fossil fuels, plays an important role in the process of energy transformation. In this work, Fe_0.7Ni_0.3/Ni(OH)₂ nanosheets were successfully constructed on nickel foam (labeled as Fe_0.7Ni_0.3/Ni(OH)₂/NF) by a cathodic electrodeposition technique, using ferrous sulfate and nickel sulfate as iron and nickel sources. Electrochemical measurements showed that the as-constructed Fe_0.7Ni_0.3/Ni(OH)₂/NF electrode owned excellent electrocatalytic OER activity. In 1 M KOH solution, the Fe_0.7Ni_0.3/Ni(OH)₂/NF electrode required only 198 mV of overpotential to achieve a current density of 10 mA cm^-2. In addition, at a large current density of 100 mA cm^-2, the Fe_0.7Ni_0.3/Ni(OH)₂/NF electrode could run stably for &gt;210 h without marked potential attenuation, exhibiting excellent durability of the present self-supporting electrode. The in-situ Raman spectra studies revealed that the synergistic effect between Fe and Ni facilitated the production of the active substance NiOOH at a lower voltage, which effectively promotes the charge redistribution around the Ni/Fe site and the OER kinetics, further improving the OER performance. The present work provides a new strategy to construct highly-active and durable FeNi-based intermetallic electrocatalyst for oxygen evolution in alkaline media.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113734"},"PeriodicalIF":5.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144887060","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":"Green-synthesized Ag-Ag2S Heterostructures for efficient catalytic remediation of 4-Nitrophenol","authors":"Shreepooja Bhat ,&nbsp;T.K. Nanditha ,&nbsp;Namitha B ,&nbsp;Rajashekhar Pujar ,&nbsp;Srivathsava Surabhi ,&nbsp;S.C. Gurumurthy","doi":"10.1016/j.materresbull.2025.113732","DOIUrl":"10.1016/j.materresbull.2025.113732","url":null,"abstract":"<div><div>The contamination of water bodies by toxic dyes such as 4-nitrophenol (4-NP) presents a critical environmental challenge, driving the need for efficient and sustainable remediation strategies. This study investigates the synthesis and catalytic performance of Ag-Ag₂S alloy nanoparticles (NPs) prepared via green and conventional chemical routes. Structural and morphological characterizations confirmed the successful formation of the alloy phase through both methods. The green-synthesized NPs exhibited a smaller average size (∼5 nm) compared to chemically synthesized ones (∼23 nm), which contributed to their enhanced catalytic activity. In reduction experiments, the green-synthesized Ag-Ag₂S NPs achieved a high reduction efficiency of 84 % within 6 min, significantly outperforming the chemically synthesized NPs, which reached only 54.6 % efficiency in 21 min. The findings highlight the superior catalytic potential of green-synthesized Ag-Ag₂S nanoparticles and underscore their promise as eco-friendly nanocatalysts for wastewater treatment applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113732"},"PeriodicalIF":5.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144878490","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":"Flexible pressure sensor based on Cu mesh/ZnO nanorod/graphene","authors":"Panting Zheng,&nbsp;Pengfei Zhao,&nbsp;Jijun Ding,&nbsp;Haixia Chen,&nbsp;Yongfeng Qu","doi":"10.1016/j.materresbull.2025.113735","DOIUrl":"10.1016/j.materresbull.2025.113735","url":null,"abstract":"<div><div>Flexible pressure sensors have wide range of applications in fields such as electronic skin, medical detection and wearable devices. In this paper, a flexible piezoresistive pressure sensor based on Cu mesh/ZnO nanorod/graphene pressure-active layer is designed. Cu mesh is used as the conductive substrate, which not only enhances sensor performance but also expands the detection range of the sensor with its interlaced grid structure. To enhance the stability of the sensor, the graphene-functionalized polyvinylidene fluoride (PVDF) film is inserted between this active layer and the bottom electrodes, which prevents the direct contact between the Cu mesh and the electrodes, increases the electron transport channel and enhances the responsiveness of the sensor. The sensor shows sensitivity of 0.4 kPa^-1 over pressure range of 0–0.5 kPa, as well as response time of 413 ms. Based on the excellent characteristics, a 4 × 4 pressure sensor array is constructed for the application of pressure sensors in daily life and human activity detection, which enables high-resolution detection and provides a reliable idea for the design of flexible sensors in the future.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113735"},"PeriodicalIF":5.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144887368","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":"Concentration-dependent luminescence thermal quenching behavior in NaY(WO4)2: Er3+ phosphors","authors":"Mingyue Zhang ,&nbsp;Xin Wang ,&nbsp;Yanqiu Zhang ,&nbsp;Xin Chen ,&nbsp;Yuhan Fan ,&nbsp;Baojiu Chen","doi":"10.1016/j.materresbull.2025.113737","DOIUrl":"10.1016/j.materresbull.2025.113737","url":null,"abstract":"<div><div>Luminescent thermal quenching is a crucial factor affecting luminescent performance and has been widely studied. However, very less efforts have been paid to the concentration effect on luminescence thermal quenching. This work aims to experimentally reveal the concentration dependence of luminescent thermal quenching. To this end, NaY_(1-x)Er_x(WO₄)₂ (x = 0.005, 0.01, 0.02, 0.1, 0.20., 0.5) phosphors were synthesized and the X-ray diffraction (XRD) characterization reveals that pure-phase NaY(WO₄)₂ crystalline powders were obtained. The temperature-dependent luminescence intensities for the transitions from ²H_11/2, ⁴S_3/2, ⁴F_9/2, ⁴I_11/2, ⁴I_13/2 to ⁴I_15/2 were experimentally observed upon 378 and 980 nm excitation, and it was found that the Er³⁺ concentration affects the luminescence thermal quenching greatly. The possible mechanisms for the concentration-dependent luminescence thermal quenching were deduced based on the spectral measurements. It was found that the sample temperature mainly changes the non-radiative relaxation rates, thus further resulting in the changes of energy transfer approaches. Thus, the investigations of concentration-dependent thermal quenching will shed light on the impacts of doping concentrations and temperatures on up-conversion (UC) and downshifting (DS) luminescence.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113737"},"PeriodicalIF":5.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144889851","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":"Green synthesis, morphological characterization, antimicrobial, antioxidant, biomolecular interaction of manganese dioxide nanoparticles using Terminalia catappa Leaf Extract","authors":"Murugesan Sankarganesh ,&nbsp;Jeyaraj Dhaveethu Raja ,&nbsp;Nagaraj Revathi ,&nbsp;Paramasivam Sivaranjana ,&nbsp;Nagarajan Karthikeyan ,&nbsp;Palani Karthik ,&nbsp;Shanmugasundaram Gurusamy","doi":"10.1016/j.materresbull.2025.113733","DOIUrl":"10.1016/j.materresbull.2025.113733","url":null,"abstract":"<div><div>The green synthesis of manganese dioxide nanoparticles (TC-MDO NPs) using <em>Terminalia catappa</em> (<em>T. catappa</em>) leaf extract is presented in this work in an effective and environmentally friendly manner. Different spectroscopic methods, including UV–visible, FT-IR, Powder XRD, EDX, SEM and TEM were used to characterise the synthesised TC-MDO NPs. The effective synthesis of TC-MDO NPs was confirmed from the UV-visible and FT-IR spectroscopic, Powder XRD and EDX methods. The rectangle shape was validated by the results of the SEM and TEM techniques with an average particle size of 13–18 nm. The agar diffusion method was used to investigate the antibacterial and antifungal activities of TC-MDO NPs, while the DPPH radical scavenging assay was used to determine their antioxidant capabilities. These findings point to better antioxidant and antimicrobial potential. To thoroughly investigate the biointerfacial interaction between DNA/BSA with TC-MDO NPs at varied DNA/BSA concentrations, UV–vis absorption spectra and fluorescence spectra are used. When DNA and BSA come into contact with nanoparticles, there are noticeable structural and conformational changes, according to physicochemical investigations of TC-MDO NPs. Green synthesis appears to offer a cost-effective, environmentally friendly and simple alternative to traditional ways of producing TC-MDO NPs. The strong bioactivity exhibited by the produced TC-MDO NPs suggests therapeutic usage as an antibacterial and antioxidant. Regarding correlation, all investigations indicated that intercalative contact controls the majority of the interaction between nanoparticles and DNA. The findings provide critical fundamental understanding into the study of DNA and TC-MDO NPs. Biosensing, bioimaging, and therapeutic applications all depend on DNA's ability to bind to TC-MDO NPs.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113733"},"PeriodicalIF":5.7,"publicationDate":"2025-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912638","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":"High-performance aqueous asymmetric pseudo-supercapacitor using potassium doped Maganese oxide and resorcinol-formaldehyde aerogel for extended voltage operation","authors":"Zahoor ud din ,&nbsp;Israr Ahmad ,&nbsp;Muhammad Shahab ,&nbsp;Sana Ullah ,&nbsp;Mustafa kamal ,&nbsp;Subhan Ali ,&nbsp;Muhammad Zeeshan ,&nbsp;Muhammad Tariq ,&nbsp;Anis Ur Rahman ,&nbsp;Rajwali Khan ,&nbsp;Asad Ali","doi":"10.1016/j.materresbull.2025.113725","DOIUrl":"10.1016/j.materresbull.2025.113725","url":null,"abstract":"<div><div>Herein, we reports the fabrication of potassium doped manganese dioxide coupled with carbon aerogel derived from donor-acceptor resorcinol formaldehyde polymer (K-δMnO₂/RF) which resulted in enhanced surface area (231.064 m²/g), high pore volume (0.113 cc/g), enhanced charge conductivity, widened potential window of -0.1 to 2.5 V and highly redox reversible gravimetric capacitance of 663 F/g and areal capacitance 184 mAh/g. The porous carbon aerogel is believed to assist the intercalation-de-intercalation thereby, boosting the Faradic process of pseudo-capacitive performance of the heterojunction. An efficient aqueous asymmetric super-capacitor (K-δMnO₂/RF//AC) was devised which demonstrated steady operating potential window of -0.1to 2.5 V in 1 M Na₂SO₄ aqueous solution as electrolyte. The fabricated aqueous asymmetric pseudo-super capacitor has enhanced energy density of 251 Wh/Kg Power density of 1.6 kW/Kg and specific capacitance of 322 F/g and an extended cycle execution with capacitance retention of 98% over 10,000 cycles.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113725"},"PeriodicalIF":5.7,"publicationDate":"2025-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144867012","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}