Pub Date : 2025-10-01DOI: 10.1016/j.mtnano.2025.100689
Junjie Wang , Junhui Yan , Zhaohui Li, Xing Du, Hui Chen, Xuan He, Weixin Li, Wei Fang, Daheng Wang, Lei Zhao
The low electron conductivity of transition metal carbonate hydroxides (TMCHs) makes their oxygen evolution reaction (OER) activities being far from meeting the requirements of practical application. In this work, a short rod-like self-supporting heterostructured electrode is fabricated by in-situ conversion of Ni-Fe carbonate hydroxide to NiFe-based conductive metal-organic frameworks (c-MOFs). Thanks to the unique short rod-like heterostructure, more catalytic active sites can be exposed, and electron transfer at the heterogeneous interface regulates the electronic structure of the active center. The electrode exhibits an excellent catalytic activity with an overpotential of only 235 mV at 10 mA cm−2 in 1.0 M KOH and excellent stability at multiple current densities from 10 mA cm−2 to 50 mA cm−2 toward the OER.
过渡金属碳酸盐氢氧化物（TMCHs）的低电子导电性使得其析氧反应（OER）活性远远不能满足实际应用的要求。在这项工作中，通过原位转化Ni-Fe碳酸盐氢氧化物到nife基导电金属有机框架（c-MOFs），制备了一种短棒状自支撑异质结构电极。由于其独特的短棒状异质结构，可以暴露出更多的催化活性位点，并且异质界面上的电子转移调节了活性中心的电子结构。在1.0 M KOH条件下，该电极在10 mA cm−2下的过电位仅为235 mV，在10 mA cm−2至50 mA cm−2的多种电流密度下具有优异的OER稳定性。
{"title":"Self-supporting heterostructured electrode via in-situ conversion: Short rod-like Ni-Fe carbonate hydroxides/conductive MOFs synergy for efficient oxygen evolution","authors":"Junjie Wang , Junhui Yan , Zhaohui Li, Xing Du, Hui Chen, Xuan He, Weixin Li, Wei Fang, Daheng Wang, Lei Zhao","doi":"10.1016/j.mtnano.2025.100689","DOIUrl":"10.1016/j.mtnano.2025.100689","url":null,"abstract":"<div><div>The low electron conductivity of transition metal carbonate hydroxides (TMCHs) makes their oxygen evolution reaction (OER) activities being far from meeting the requirements of practical application. In this work, a short rod-like self-supporting heterostructured electrode is fabricated by in-situ conversion of Ni-Fe carbonate hydroxide to NiFe-based conductive metal-organic frameworks (c-MOFs). Thanks to the unique short rod-like heterostructure, more catalytic active sites can be exposed, and electron transfer at the heterogeneous interface regulates the electronic structure of the active center. The electrode exhibits an excellent catalytic activity with an overpotential of only 235 mV at 10 mA cm<sup>−2</sup> in 1.0 M KOH and excellent stability at multiple current densities from 10 mA cm<sup>−2</sup> to 50 mA cm<sup>−2</sup> toward the OER.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"32 ","pages":"Article 100689"},"PeriodicalIF":8.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-09-23DOI: 10.1016/j.mtnano.2025.100688
Yaozheng Tang , Bo Gao , Yuqi Ouyang , Qun Xu
The development of two-dimensional ferromagnetic materials is of great significance for the next generation of spintronic devices. This work proposes an innovative strategy based on supercritical carbon dioxide (SC CO2)-assisted lattice strain engineering, which successfully achieves room-temperature ferromagnetism in two-dimensional PbTiO3 nanosheets. Through SC CO2 induced in situ reactions, a PbTiO3/PbO heterointerface with significant lattice mismatch was constructed on the PbTiO3 surface. Systematic characterization revealed that the interface strain caused tensile deformation of the PbTiO3 lattice and local octahedral distortion, while introducing a certain concentration of oxygen vacancies and Ti3+ ions. This unique structural modification enables the material to exhibit distinct room-temperature ferromagnetism. This study not only provides new insights into the magnetic regulation of two-dimensional perovskite materials but also demonstrates the unique advantages of supercritical fluid technology in functional material design.
{"title":"Supercritical CO2-induced strain in PbTiO3 to realize room-temperature ferromagnetism","authors":"Yaozheng Tang , Bo Gao , Yuqi Ouyang , Qun Xu","doi":"10.1016/j.mtnano.2025.100688","DOIUrl":"10.1016/j.mtnano.2025.100688","url":null,"abstract":"<div><div>The development of two-dimensional ferromagnetic materials is of great significance for the next generation of spintronic devices. This work proposes an innovative strategy based on supercritical carbon dioxide (SC CO<sub>2</sub>)-assisted lattice strain engineering, which successfully achieves room-temperature ferromagnetism in two-dimensional PbTiO<sub>3</sub> nanosheets. Through SC CO<sub>2</sub> induced in situ reactions, a PbTiO<sub>3</sub>/PbO heterointerface with significant lattice mismatch was constructed on the PbTiO<sub>3</sub> surface. Systematic characterization revealed that the interface strain caused tensile deformation of the PbTiO<sub>3</sub> lattice and local octahedral distortion, while introducing a certain concentration of oxygen vacancies and Ti<sup>3+</sup> ions. This unique structural modification enables the material to exhibit distinct room-temperature ferromagnetism. This study not only provides new insights into the magnetic regulation of two-dimensional perovskite materials but also demonstrates the unique advantages of supercritical fluid technology in functional material design.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"32 ","pages":"Article 100688"},"PeriodicalIF":8.2,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-09-22DOI: 10.1016/j.mtnano.2025.100685
Zhen Guo , Qinghai Liu , Man Peng , Tianjiao Shi , Shuyan Yu , Shuang Xu , Xiaodong Dai , Congju Li
With the rapid development of communications, the electromagnetic environment we live in has been ignored, so absorbing materials have attracted attention in daily life and even national strategic fields. Flexible TiO2/FeNi/C nanofiber membranes have been prepared through electrospinning, stabilization, and carbonization processes in this study. The unique three-dimensional network structure of nanofibers provides a large specific surface area and porous architecture, facilitating multiple scattering and interface polarization of electromagnetic waves, while the incorporation of TiO2 and FeNi nanoparticles creates abundant heterogeneous interfaces, enhancing interfacial polarization and magnetic loss mechanisms. The electromagnetic wave absorption performance and electromagnetic parameters of the absorber in the frequency range of 1–18 GHz were studied. By adjusting the content of dielectric components and magnetic components, the impedance matching and electromagnetic wave absorption performance of TiO2/FeNi/C have been improved. This optimization achieves a synergistic effect between dielectric loss (from conductive carbon networks and interfacial polarization) and magnetic loss (from natural resonance and exchange resonance of FeNi nanoparticles), significantly enhancing the attenuation of electromagnetic energy. At a thickness of 2.4 mm, the minimum reflection loss reaches −43.77 dB, and the comprehensive absorption bandwidth reaches 9.9 GHz. Owing to multiple loss mechanisms, nanosized effects, and optimized impedance matching between FeNi nanoparticles and CNFs, this lightweight and flexible TiO2/FeNi/C nanofiber composite exhibits promising application prospects as an electromagnetic wave absorber.
{"title":"Flexible electrospun carbon nanofiber embedded with TiO2/FeNi as efficient microwave absorber","authors":"Zhen Guo , Qinghai Liu , Man Peng , Tianjiao Shi , Shuyan Yu , Shuang Xu , Xiaodong Dai , Congju Li","doi":"10.1016/j.mtnano.2025.100685","DOIUrl":"10.1016/j.mtnano.2025.100685","url":null,"abstract":"<div><div>With the rapid development of communications, the electromagnetic environment we live in has been ignored, so absorbing materials have attracted attention in daily life and even national strategic fields. Flexible TiO<sub>2</sub>/FeNi/C nanofiber membranes have been prepared through electrospinning, stabilization, and carbonization processes in this study. The unique three-dimensional network structure of nanofibers provides a large specific surface area and porous architecture, facilitating multiple scattering and interface polarization of electromagnetic waves, while the incorporation of TiO<sub>2</sub> and FeNi nanoparticles creates abundant heterogeneous interfaces, enhancing interfacial polarization and magnetic loss mechanisms. The electromagnetic wave absorption performance and electromagnetic parameters of the absorber in the frequency range of 1–18 GHz were studied. By adjusting the content of dielectric components and magnetic components, the impedance matching and electromagnetic wave absorption performance of TiO<sub>2</sub>/FeNi/C have been improved. This optimization achieves a synergistic effect between dielectric loss (from conductive carbon networks and interfacial polarization) and magnetic loss (from natural resonance and exchange resonance of FeNi nanoparticles), significantly enhancing the attenuation of electromagnetic energy. At a thickness of 2.4 mm, the minimum reflection loss reaches −43.77 dB, and the comprehensive absorption bandwidth reaches 9.9 GHz. Owing to multiple loss mechanisms, nanosized effects, and optimized impedance matching between FeNi nanoparticles and CNFs, this lightweight and flexible TiO<sub>2</sub>/FeNi/C nanofiber composite exhibits promising application prospects as an electromagnetic wave absorber.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"32 ","pages":"Article 100685"},"PeriodicalIF":8.2,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-09-22DOI: 10.1016/j.mtnano.2025.100687
Xiaodong Li , Lina Zhang , Yuxin Tian , Xiaotong Yin , Jialin Wu , Jiaju Wang , Jinwen Ma , Shi Su , Wei Zhang
The increasing discharge of pharmaceuticals and heavy metals into aquatic environments poses serious ecological threats, creating an urgent need for effective wastewater treatment technologies. In this study, a MoO3@SnIn4S8 heterojunction photocatalyst was successfully produced via a facile straightforward hydro/solvothermal technique for photocatalytic degradation of both levofloxacin (LEV) antibiotics and hexavalent chromium (Cr(VI)). The optimized MS-0.05 heterojunction exhibited exceptional photocatalytic performance, achieving 94.5 % degradation of LEV (40 mg/L) within 50 min using only 0.2 g/L catalyst, significantly outperforming pristine MoO3 (5 %) and SnIn4S8 (80.4 %). For Cr(VI) reduction, the heterojunction at a dosage of 0.5 g/L accomplished complete removal of 20 mg/L Cr(VI) within 50 min, demonstrating remarkable improvements over the individual components (MoO3: 7.4 %; SnIn4S8: 66.7 %). Comprehensive characterization and theoretical analysis revealed an S-scheme charge transfer pathway governing the photocatalytic process. These findings demonstrate the great potential of MoO3@SnIn4S8 heterojunction as an efficient dual-functional photocatalyst for removing both pharmaceutical contaminants and heavy metals in wastewater treatment applications.
{"title":"Efficient levofloxacin degradation and Cr(VI) reduction by S-scheme MoO3@SnIn4S8 heterostructure","authors":"Xiaodong Li , Lina Zhang , Yuxin Tian , Xiaotong Yin , Jialin Wu , Jiaju Wang , Jinwen Ma , Shi Su , Wei Zhang","doi":"10.1016/j.mtnano.2025.100687","DOIUrl":"10.1016/j.mtnano.2025.100687","url":null,"abstract":"<div><div>The increasing discharge of pharmaceuticals and heavy metals into aquatic environments poses serious ecological threats, creating an urgent need for effective wastewater treatment technologies. In this study, a MoO<sub>3</sub>@SnIn<sub>4</sub>S<sub>8</sub> heterojunction photocatalyst was successfully produced via a facile straightforward hydro/solvothermal technique for photocatalytic degradation of both levofloxacin (LEV) antibiotics and hexavalent chromium (Cr(VI)). The optimized MS-0.05 heterojunction exhibited exceptional photocatalytic performance, achieving 94.5 % degradation of LEV (40 mg/L) within 50 min using only 0.2 g/L catalyst, significantly outperforming pristine MoO<sub>3</sub> (5 %) and SnIn<sub>4</sub>S<sub>8</sub> (80.4 %). For Cr(VI) reduction, the heterojunction at a dosage of 0.5 g/L accomplished complete removal of 20 mg/L Cr(VI) within 50 min, demonstrating remarkable improvements over the individual components (MoO<sub>3</sub>: 7.4 %; SnIn<sub>4</sub>S<sub>8</sub>: 66.7 %). Comprehensive characterization and theoretical analysis revealed an S-scheme charge transfer pathway governing the photocatalytic process. These findings demonstrate the great potential of MoO<sub>3</sub>@SnIn<sub>4</sub>S<sub>8</sub> heterojunction as an efficient dual-functional photocatalyst for removing both pharmaceutical contaminants and heavy metals in wastewater treatment applications.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"32 ","pages":"Article 100687"},"PeriodicalIF":8.2,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-09-20DOI: 10.1016/j.mtnano.2025.100686
S. Calderon V , L.F. Ballesteros , C. Gonçalves , G. Dittmann , C. Evans , M.A. Cerqueira , L.M. Pastrana
Counterfeiting of assets, documents, and goods is a growing issue with substantial economic impacts from the proliferation of fake products and significant risks to consumer health and safety. This highlights the urgent need for advanced anti-counterfeiting technologies. In this work, we demonstrate a novel approach to creating unclonable fluorescent tags on poly(lactic acid) (PLA) films using electron beam irradiation. By optimizing irradiation conditions, we successfully control the formation of carbon dots on the surface of the PLA-based film, resulting in the formation of carbon dots that emit fluorescence. The formation of carbon dots was confirmed by Raman spectroscopy and transmission electron microscopy. These carbon dots display tunable emission intensity and spatial distribution, allowing the creation of both deterministic and stochastic fluorescent patterns. Our findings demonstrate that the resolution and definition of the resulting images can be tailored to create either reproducible patterns or unique, unclonable ones. For the unclonable tags, even when identical imaging and processing conditions are applied, the tags exhibit distinct characteristics, highlighting the stochastic nature of the process. The robustness of this method was validated through fluorescence readings and independent measurements by different operators using varied equipment, ensuring reliable and consistent results. To assess the uniqueness and reliability metrics of physical unclonable functions (PUFs), we evaluated the Hamming distance, obtaining mean values of 43.5 % for uniqueness and 88.7 % for reliability. These results underscore the reliability and reproducibility of the produced tags as PUFs.
{"title":"Unclonable fluorescent tags produced on bioplastics by in-situ electron beam irradiation","authors":"S. Calderon V , L.F. Ballesteros , C. Gonçalves , G. Dittmann , C. Evans , M.A. Cerqueira , L.M. Pastrana","doi":"10.1016/j.mtnano.2025.100686","DOIUrl":"10.1016/j.mtnano.2025.100686","url":null,"abstract":"<div><div>Counterfeiting of assets, documents, and goods is a growing issue with substantial economic impacts from the proliferation of fake products and significant risks to consumer health and safety. This highlights the urgent need for advanced anti-counterfeiting technologies. In this work, we demonstrate a novel approach to creating unclonable fluorescent tags on poly(lactic acid) (PLA) films using electron beam irradiation. By optimizing irradiation conditions, we successfully control the formation of carbon dots on the surface of the PLA-based film, resulting in the formation of carbon dots that emit fluorescence. The formation of carbon dots was confirmed by Raman spectroscopy and transmission electron microscopy. These carbon dots display tunable emission intensity and spatial distribution, allowing the creation of both deterministic and stochastic fluorescent patterns. Our findings demonstrate that the resolution and definition of the resulting images can be tailored to create either reproducible patterns or unique, unclonable ones. For the unclonable tags, even when identical imaging and processing conditions are applied, the tags exhibit distinct characteristics, highlighting the stochastic nature of the process. The robustness of this method was validated through fluorescence readings and independent measurements by different operators using varied equipment, ensuring reliable and consistent results. To assess the uniqueness and reliability metrics of physical unclonable functions (PUFs), we evaluated the Hamming distance, obtaining mean values of 43.5 % for uniqueness and 88.7 % for reliability. These results underscore the reliability and reproducibility of the produced tags as PUFs.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"32 ","pages":"Article 100686"},"PeriodicalIF":8.2,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-09-19DOI: 10.1016/j.mtnano.2025.100684
Qiang Zhang , Haoyu Song , Pengyang Zou , Zihao Liu , Jianzhong Xu , Weihua Meng
Firefighters cannot feel and operate objects sensitively during work due to the thick protective cloth. Here, we report a flexible pressure sensor based on T-ZnO and flame-retardant textile for fine operation during fire fight. In order to reduce the effects of residual stresses of the interface between sensor and protective clothing, cotton textile was used as substrate and the thickness of the sensor system was controlled in this work. We design 3 × 3 sensors array for complicated object operation. The thickness of the whole textile system is 1.3 mm, while the sensitive layer is 70 μm. The sensor system is composed of flame retardant textile, textile substrates, graphene electrodes and tetrapod-like zinc oxide (T-ZnO). Flame retardant textile showed excellent flame retardancy with peak heat release rate of 130.19 kW/m2 and total heat release of 3.20 MJ/m2, which was decrease by 37.58 % and 31.33 % compared to pure textile. The sensitivity of the sensor is 3.97 mV/N as detecting 0.2–2 N force. Moreover, the sensor shows outstanding repeatability in different frequencies and long term of pressure. Toroidal and crossed object were measured to illustrate the pressure position sensing ability. The sensor system was adhered on fire fighter's glove, the pressure of operating screwdriver and pliers on flame was sensed successfully.
{"title":"Flame retardant flexible pressure sensor textile based on T-ZnO","authors":"Qiang Zhang , Haoyu Song , Pengyang Zou , Zihao Liu , Jianzhong Xu , Weihua Meng","doi":"10.1016/j.mtnano.2025.100684","DOIUrl":"10.1016/j.mtnano.2025.100684","url":null,"abstract":"<div><div>Firefighters cannot feel and operate objects sensitively during work due to the thick protective cloth. Here, we report a flexible pressure sensor based on T-ZnO and flame-retardant textile for fine operation during fire fight. In order to reduce the effects of residual stresses of the interface between sensor and protective clothing, cotton textile was used as substrate and the thickness of the sensor system was controlled in this work. We design 3 × 3 sensors array for complicated object operation. The thickness of the whole textile system is 1.3 mm, while the sensitive layer is 70 μm. The sensor system is composed of flame retardant textile, textile substrates, graphene electrodes and tetrapod-like zinc oxide (T-ZnO). Flame retardant textile showed excellent flame retardancy with peak heat release rate of 130.19 kW/m<sup>2</sup> and total heat release of 3.20 MJ/m<sup>2</sup>, which was decrease by 37.58 % and 31.33 % compared to pure textile. The sensitivity of the sensor is 3.97 mV/N as detecting 0.2–2 N force. Moreover, the sensor shows outstanding repeatability in different frequencies and long term of pressure. Toroidal and crossed object were measured to illustrate the pressure position sensing ability. The sensor system was adhered on fire fighter's glove, the pressure of operating screwdriver and pliers on flame was sensed successfully.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"32 ","pages":"Article 100684"},"PeriodicalIF":8.2,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-09-18DOI: 10.1016/j.mtnano.2025.100680
Li Guan , Xin Xu , Limeng Song , Cheng Song , Linan Wang , Bozhen Song , Qiancheng Gao , Xinyue Zhang , Hanghang Shen , Wenjie Wang , Hongyue Yuan , Zhiyu Min , Rui Zhang
SiC nanowires (SiC NWs) as one-dimensional nanomaterials, offer a high aspect ratio, good thermal stability, and promising EMW absorption capabilities, making them suitable for high-temperature EMW absorption applications. However, the high production cost of SiC NWs presents a significant barrier to large-scale manufacturing. To address this issue, this study proposes a novel strategy using low-cost biomass flour as the carbon source and neutral silica sol as the silicon source to synthesize SiC NWs with high yield and favorable morphology via chemical vapor deposition (CVD). Thermogravimetric analysis revealed an oxidation temperature of 925 °C for the SiC NWs, confirming their excellent thermal stability. Furthermore, as-prepared SiC NWs also exhibited outstanding EMW absorption properties, including a minimum reflection loss (RLmin) of −45.21 dB and a maximum effective absorption bandwidth (EABmax) of 4.8 GHz. The practical EMW attenuation performance of the SiC NWs was evaluated using radar cross-section (RCS) simulation, which showed the highest RCS reduction of 48.11 dB m2 at an incident angle of θ = 33°. These results indicate that the successful preparation of SiC NWs provides a strong foundation for their application as high-level EMW absorbing materials.
{"title":"Biomass carbon-derived SiC nanowires for efficient electromagnetic wave absorption","authors":"Li Guan , Xin Xu , Limeng Song , Cheng Song , Linan Wang , Bozhen Song , Qiancheng Gao , Xinyue Zhang , Hanghang Shen , Wenjie Wang , Hongyue Yuan , Zhiyu Min , Rui Zhang","doi":"10.1016/j.mtnano.2025.100680","DOIUrl":"10.1016/j.mtnano.2025.100680","url":null,"abstract":"<div><div>SiC nanowires (SiC NWs) as one-dimensional nanomaterials, offer a high aspect ratio, good thermal stability, and promising EMW absorption capabilities, making them suitable for high-temperature EMW absorption applications. However, the high production cost of SiC NWs presents a significant barrier to large-scale manufacturing. To address this issue, this study proposes a novel strategy using low-cost biomass flour as the carbon source and neutral silica sol as the silicon source to synthesize SiC NWs with high yield and favorable morphology via chemical vapor deposition (CVD). Thermogravimetric analysis revealed an oxidation temperature of 925 °C for the SiC NWs, confirming their excellent thermal stability. Furthermore, as-prepared SiC NWs also exhibited outstanding EMW absorption properties, including a minimum reflection loss (RL<sub>min</sub>) of −45.21 dB and a maximum effective absorption bandwidth (EAB<sub>max</sub>) of 4.8 GHz. The practical EMW attenuation performance of the SiC NWs was evaluated using radar cross-section (RCS) simulation, which showed the highest RCS reduction of 48.11 dB m<sup>2</sup> at an incident angle of θ = 33°. These results indicate that the successful preparation of SiC NWs provides a strong foundation for their application as high-level EMW absorbing materials.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"32 ","pages":"Article 100680"},"PeriodicalIF":8.2,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-09-18DOI: 10.1016/j.mtnano.2025.100682
Yanzhi Cai , Xinyu Qian , Laifei Cheng , Xiaohang Chen , Honglin Ai , Meng L , Yunge Jiang , Fanfan Wei , Hui Ding , Mingshu Bai
Constructing a self-supporting superflexible skeleton to protect silicon (Si) nanoparticles, to maintain capacity stability, and being suitable for the development of wearable electronics, which constitute the current technical bottleneck in the development of Si-based anode materials. In this paper, carbon nanotube-reduced graphene oxide/Si nanoparticles encapsulated by a double-layer film of porous carbon and SiO2 (CNT-rGO/Si@PC@SiO2) aerogel buckypaper (BP) was synthesized by directional pressure filtration and directional pressure infiltration. The Si nanoparticles were encased in a porous carbon shell and further encased by silica sol, preventing the occurrence of side reactions and the repeated formation of the solid electrolyte interphase (SEI). One-dimensional CNT and two-dimensional rGO jointly construct 3D superflexible porous conductive skeleton, eliminating the inert binder and collector. The silica sol bonded the cross-contact points to form a robust 3D skeleton, further improved the strength and flexibility, and also served as an active material to enhance battery capacity. Double-layer encapsulation and double-carbon superflexible porous skeleton preventing Si nanoparticles from falling off and suffering losses during charge-discharge cycles, so that high rate performance and long-cycle stability were obtained. The CNT-rGO/Si@PC@SiO2 anode provides a stable capacity of 918.3 mAh/g after 200 cycles at 840 mA/g, and maintains a specific capacity of 675 mAh/g at 4200 mA/g. Its tensile strength was 1.47 MPa, without damage after folding into sharp creases or continuous 3000 cycles of 180° bending-straightening. The CNT-rGO/Si@PC@SiO2 anode has great potential in wearable energy storage devices.
{"title":"Binder-free self-supporting superflexible CNT-rGO/ Si@PC@SiO2 aerogel buckypaper as an anode for lithium-ion batteries and electrochemical properties","authors":"Yanzhi Cai , Xinyu Qian , Laifei Cheng , Xiaohang Chen , Honglin Ai , Meng L , Yunge Jiang , Fanfan Wei , Hui Ding , Mingshu Bai","doi":"10.1016/j.mtnano.2025.100682","DOIUrl":"10.1016/j.mtnano.2025.100682","url":null,"abstract":"<div><div>Constructing a self-supporting superflexible skeleton to protect silicon (Si) nanoparticles, to maintain capacity stability, and being suitable for the development of wearable electronics, which constitute the current technical bottleneck in the development of Si-based anode materials. In this paper, carbon nanotube-reduced graphene oxide/Si nanoparticles encapsulated by a double-layer film of porous carbon and SiO<sub>2</sub> (CNT-rGO/Si@PC@SiO<sub>2</sub>) aerogel buckypaper (BP) was synthesized by directional pressure filtration and directional pressure infiltration. The Si nanoparticles were encased in a porous carbon shell and further encased by silica sol, preventing the occurrence of side reactions and the repeated formation of the solid electrolyte interphase (SEI). One-dimensional CNT and two-dimensional rGO jointly construct 3D superflexible porous conductive skeleton, eliminating the inert binder and collector. The silica sol bonded the cross-contact points to form a robust 3D skeleton, further improved the strength and flexibility, and also served as an active material to enhance battery capacity. Double-layer encapsulation and double-carbon superflexible porous skeleton preventing Si nanoparticles from falling off and suffering losses during charge-discharge cycles, so that high rate performance and long-cycle stability were obtained. The CNT-rGO/Si@PC@SiO<sub>2</sub> anode provides a stable capacity of 918.3 mAh/g after 200 cycles at 840 mA/g, and maintains a specific capacity of 675 mAh/g at 4200 mA/g. Its tensile strength was 1.47 MPa, without damage after folding into sharp creases or continuous 3000 cycles of 180° bending-straightening. The CNT-rGO/Si@PC@SiO<sub>2</sub> anode has great potential in wearable energy storage devices.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"32 ","pages":"Article 100682"},"PeriodicalIF":8.2,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-09-18DOI: 10.1016/j.mtnano.2025.100683
Jiaxin Zhu, Yong Pan
High-performance self-powered photodetectors require strong built-in electric fields, faster response times, and broader response ranges. Monolayer β-Ga2O3, a promising material in the photodetector field, exhibits ultrahigh electron mobility, endowing it with high response speed and stability. However, its excessively large band gap weakens its absorption capacity in the infrared (IR) region, hindering its application in IR detection. We attempted to construct van der Waals heterojunctions using two-dimensional (2D) Janus materials to address these challenges. Therefore, we systematically investigated heterojunction systems composed of Janus MXY (X = S, Se, Te; Y =Mo, W) and Ga2O3 (100) surface by using first-principles calculations. It is found that the band gap of the heterojunctions is significantly reduced, forming typical Type-I/II band alignments that promote spatial separation of photogenerated electron hole pairs. All heterojunctions are thermodynamically stable, and we systematically screened out six direct band gap heterojunctions for further study based on their band structures. A large potential difference forms at the interface, generating a strong built in electric field that endows the heterojunctions with self powered capability. Optical calculations show that compared with pure Ga2O3, these heterojunctions exhibit approximately a 13 % increase in absorption coefficient in the ultraviolet (UV) region (60–100 nm) and significantly enhanced absorption in the infrared (IR) region. This study provides an important theoretical foundation for designing high performance Ga2O3-based self powered optoelectronic devices with broad spectral responses from UV to IR.
高性能自供电光电探测器需要强大的内置电场，更快的响应时间和更宽的响应范围。单层β-Ga2O3具有超高的电子迁移率，具有较高的响应速度和稳定性，在光电探测器领域具有广阔的应用前景。然而，其过大的带隙削弱了其在红外区域的吸收能力，阻碍了其在红外探测中的应用。我们尝试使用二维（2D） Janus材料构建范德华异质结来解决这些挑战。因此，我们利用第一性原理计算系统地研究了由Janus MXY （X = S, Se, Te; Y =Mo， W）和Ga2O3（100）表面组成的异质结体系。发现异质结的带隙明显减小，形成典型的i /II型带排列，促进了光生电子空穴对的空间分离。所有的异质结都是热力学稳定的，我们根据它们的能带结构系统地筛选了6个直接带隙异质结进行进一步的研究。在界面处形成较大的电位差，产生强大的内置电场，使异质结具有自供电能力。光学计算表明，与纯Ga2O3相比，这些异质结在紫外（UV）区（60-100 nm）的吸收系数增加了约13%，在红外（IR）区吸收显著增强。该研究为设计具有紫外到红外广谱响应的高性能ga2o3自供电光电器件提供了重要的理论基础。
{"title":"Janus monolayer MXY(M=Mo, W; X, Y=S, Se and Te)/β-Ga2O3 van der Waals heterojunctions with type I/II: A self powered UV to IR broad spectrum photodetector","authors":"Jiaxin Zhu, Yong Pan","doi":"10.1016/j.mtnano.2025.100683","DOIUrl":"10.1016/j.mtnano.2025.100683","url":null,"abstract":"<div><div>High-performance self-powered photodetectors require strong built-in electric fields, faster response times, and broader response ranges. Monolayer β-Ga<sub>2</sub>O<sub>3</sub>, a promising material in the photodetector field, exhibits ultrahigh electron mobility, endowing it with high response speed and stability. However, its excessively large band gap weakens its absorption capacity in the infrared (IR) region, hindering its application in IR detection. We attempted to construct van der Waals heterojunctions using two-dimensional (2D) Janus materials to address these challenges. Therefore, we systematically investigated heterojunction systems composed of Janus MXY (X = S, Se, Te; Y =Mo, W) and Ga<sub>2</sub>O<sub>3</sub> (100) surface by using first-principles calculations. It is found that the band gap of the heterojunctions is significantly reduced, forming typical Type-I/II band alignments that promote spatial separation of photogenerated electron hole pairs. All heterojunctions are thermodynamically stable, and we systematically screened out six direct band gap heterojunctions for further study based on their band structures. A large potential difference forms at the interface, generating a strong built in electric field that endows the heterojunctions with self powered capability. Optical calculations show that compared with pure Ga<sub>2</sub>O<sub>3</sub>, these heterojunctions exhibit approximately a 13 % increase in absorption coefficient in the ultraviolet (UV) region (60–100 nm) and significantly enhanced absorption in the infrared (IR) region. This study provides an important theoretical foundation for designing high performance Ga<sub>2</sub>O<sub>3</sub>-based self powered optoelectronic devices with broad spectral responses from UV to IR.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"32 ","pages":"Article 100683"},"PeriodicalIF":8.2,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-09-15DOI: 10.1016/j.mtnano.2025.100681
Ivan Bobrinetskiy , Maxim P. Nikitin
Biocomputing, i.e., performing calculations based on information processing in biological objects and their derivatives, has attracted increasing attention due to its unique capabilities for parallel processing of multiple inputs data of different nature. This approach is now being actively implemented in diagnostics and drug delivery. However, biomolecular circuits also offer a powerful tool for solving classical computational tasks using Boolean logic. Biocomputing was used to implement most logic gates and complex computational problems. Suggested solutions are typically developed in the natural environment for biomolecules, and only a few of them have been combined with electronic circuits. The combination of integrated electronic circuits and biocomputing may pave the way for a new type of computing system that enables massive parallelization of computations and scalable production of logic elements. Biocomputing integrated with CMOS-compatible technologies leverages the synergy of nanometer-scale devices and signal analyses principles assigned to biological molecules. In this review, we summarize recent advances in biocomputing based on molecular systems such as proteins and DNA integrated with nanoelectronics devices. We also discuss perspectives in CMOS-compatible biocomputing, spanning applications from medicine to information storage and processing.
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