Diamond and Related Materials最新文献

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Ultrasensitive and selective detection of indigo carmine in soft drink: A facile electrochemical approach based on Zr-MOF@MWCNTs nanocomposite

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-04-24 DOI: 10.1016/j.diamond.2025.112366

Yu Xie , Wei Zhou , Jia-Wen Yin , Yi Li , Cheng-Ye Lai , Jin-Hao Lai , Zhi-Jie Zhu , Xiu-Guang Yi , Li-Min Liu , Kalle Salminen

Indigo carmine (IC), a widely used synthetic dye, possess significant risks to human health due to its high toxicity, carcinogenicity, teratogenicity, and mutagenicity. Given its widespread use in food, beverages, and pharmaceuticals, excessive IC exposure can lead to severe health issues, including allergic reactions, gastrointestinal disturbances, and potential carcinogenic effects. Therefore, stringent monitoring of IC content in food is essential to ensure public health and safety. In this study, we developed a novel electrochemical sensor for IC detection by synthesizing a nanocomposite of zirconium-based metal-organic frameworks (Zr-MOF) and multi-walled carbon nanotubes (MWCNTs). The Zr-MOF@MWCNTs composite was characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), Fourier-transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The sensor leverages the synergistic combination of the electrocatalytic properties of Zr-MOF and the superior conductivity of MWCNTs, demonstrating rapid response, excellent selectivity, high sensitivity (4.484 μA μM^-1 cm^-2), a broad detection range (0.005–30.0 μM), and a low limit of detection (LOD, 3.0 nM). The method showed good detection performance in both phosphate buffer solutions (PBS) and real beverage samples, achieving recoveries of 94.1 %–99.4 %. This study offers a promising approach for the rapid and accurate monitoring of IC in food products, contributing to improved food safety and public health.

{"title":"Ultrasensitive and selective detection of indigo carmine in soft drink: A facile electrochemical approach based on Zr-MOF@MWCNTs nanocomposite","authors":"Yu Xie , Wei Zhou , Jia-Wen Yin , Yi Li , Cheng-Ye Lai , Jin-Hao Lai , Zhi-Jie Zhu , Xiu-Guang Yi , Li-Min Liu , Kalle Salminen","doi":"10.1016/j.diamond.2025.112366","DOIUrl":"10.1016/j.diamond.2025.112366","url":null,"abstract":"<div><div>Indigo carmine (IC), a widely used synthetic dye, possess significant risks to human health due to its high toxicity, carcinogenicity, teratogenicity, and mutagenicity. Given its widespread use in food, beverages, and pharmaceuticals, excessive IC exposure can lead to severe health issues, including allergic reactions, gastrointestinal disturbances, and potential carcinogenic effects. Therefore, stringent monitoring of IC content in food is essential to ensure public health and safety. In this study, we developed a novel electrochemical sensor for IC detection by synthesizing a nanocomposite of zirconium-based metal-organic frameworks (Zr-MOF) and multi-walled carbon nanotubes (MWCNTs). The Zr-MOF@MWCNTs composite was characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), Fourier-transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The sensor leverages the synergistic combination of the electrocatalytic properties of Zr-MOF and the superior conductivity of MWCNTs, demonstrating rapid response, excellent selectivity, high sensitivity (4.484 μA μM<sup>-1</sup> cm<sup>-2</sup>), a broad detection range (0.005–30.0 μM), and a low limit of detection (LOD, 3.0 nM). The method showed good detection performance in both phosphate buffer solutions (PBS) and real beverage samples, achieving recoveries of 94.1 %–99.4 %. This study offers a promising approach for the rapid and accurate monitoring of IC in food products, contributing to improved food safety and public health.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"155 ","pages":"Article 112366"},"PeriodicalIF":4.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874950","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}

引用次数: 0

The influences from CrN transition layer thickness to the tribological and corrosion performance of DLC films

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-04-22 DOI: 10.1016/j.diamond.2025.112358

Jianming Wang , Xiao Tao , Xiyu Zhang, Feng Tian, Zhiquan Huang, Wubian Tian, Jian Chen

The CrN hard interlayer can enhance the performance of DLC (Diamond-Like Carbon) films; however, it simultaneously introduces internal stress and nitrogen (N). To elucidate its effects, this study employs the non-equilibrium magnetron sputtering technique to prepare DLC films on 316 stainless steel substrates with and without CrN transition layers of 0.4, 0.8, and 1.2 μm thicknesses, respectively. The morphology, phase composition, adhesion strength, hardness, wear resistance, and corrosion resistance of the prepared films were systematically investigated using SEM, XRD, TEM, Raman spectroscopy, scratch testing, nanoindentation, micro-hardness, electrochemical workstation, and wear testing. With increasing CrN transition layer thickness, the CrN XRD peak shifts to higher 2θ angles accompanied by a broadening FWHM, indicative of enhanced compressive stress, while residual nitrogen incorporation and elevated deposition temperatures synergistically promote sp² content in DLC films. Comparing among all films, the film with a 0.8 μm CrN transition layer (C3) exhibited the lowest stable friction coefficient and the smallest wear rate (one third of the one without CrN layer), characterized by mild abrasive wear. Additionally, in Tafel curve, the corrosion current density of C3 is 1/4 of that for the C1 sample. However, as the CrN layer thickness increases further from 0.8 to 1.2 μm (C4), the coated surface exhibits the worst tribological performance, likely due to excessive stress concentration and micro-cracking in the CrN layer. This systematic study provides insights into the performance and design of wear- and corrosion-resistance Cr/CrN/DLC films.

{"title":"The influences from CrN transition layer thickness to the tribological and corrosion performance of DLC films","authors":"Jianming Wang , Xiao Tao , Xiyu Zhang, Feng Tian, Zhiquan Huang, Wubian Tian, Jian Chen","doi":"10.1016/j.diamond.2025.112358","DOIUrl":"10.1016/j.diamond.2025.112358","url":null,"abstract":"<div><div>The CrN hard interlayer can enhance the performance of DLC (Diamond-Like Carbon) films; however, it simultaneously introduces internal stress and nitrogen (N). To elucidate its effects, this study employs the non-equilibrium magnetron sputtering technique to prepare DLC films on 316 stainless steel substrates with and without CrN transition layers of 0.4, 0.8, and 1.2 μm thicknesses, respectively. The morphology, phase composition, adhesion strength, hardness, wear resistance, and corrosion resistance of the prepared films were systematically investigated using SEM, XRD, TEM, Raman spectroscopy, scratch testing, nanoindentation, micro-hardness, electrochemical workstation, and wear testing. With increasing CrN transition layer thickness, the CrN XRD peak shifts to higher 2θ angles accompanied by a broadening FWHM, indicative of enhanced compressive stress, while residual nitrogen incorporation and elevated deposition temperatures synergistically promote sp<sup>2</sup> content in DLC films. Comparing among all films, the film with a 0.8 μm CrN transition layer (C3) exhibited the lowest stable friction coefficient and the smallest wear rate (one third of the one without CrN layer), characterized by mild abrasive wear. Additionally, in Tafel curve, the corrosion current density of C3 is 1/4 of that for the C1 sample. However, as the CrN layer thickness increases further from 0.8 to 1.2 μm (C4), the coated surface exhibits the worst tribological performance, likely due to excessive stress concentration and micro-cracking in the CrN layer. This systematic study provides insights into the performance and design of wear- and corrosion-resistance Cr/CrN/DLC films.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"155 ","pages":"Article 112358"},"PeriodicalIF":4.3,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868062","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}

引用次数: 0

Design and performance analysis of an ITO-Si-graphene hybrid nanostructure-based surface plasmon resonance sensor for enhanced gas detection

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-04-21 DOI: 10.1016/j.diamond.2025.112357

Manish Jangid , Vijay Janyani

The paper demonstrates the modeling and design of a surface plasmon resonance (SPR) sensor for gas detection, utilizing an ITO-Ag-Si hybrid nanostructure with a graphene layer. The performance of the designed structure is investigated through an angular interrogation of the Kretschmann configuration, which is based on multilayer modeling of the transfer matrix method (TMM). Through a comprehensive analysis of the resonance phenomena, including variations in structural parameters, the optimal values that maximize the sensitivity while minimizing signal loss are identified. The proposed sensor offers cost-effectiveness and exhibits a high sensitivity of 220^o/RIU for gas analytes with refractive indices (RI) ranging from 1.00 to 1.03 at a source wave length of 633 nm. This sensitivity is 2.15 times greater than that of conventional SPR-based sensors operating in the visible spectrum. The performance of the proposed SPR sensor is analyzed using several key metrics: detection accuracy (DA), sensitivity, figure of merit (FoM), and full width at half maximum (FWHM). The analytical results show that this sensor demonstrates exceptional gas-sensing capabilities compared with those reported in previous studies.

{"title":"Design and performance analysis of an ITO-Si-graphene hybrid nanostructure-based surface plasmon resonance sensor for enhanced gas detection","authors":"Manish Jangid , Vijay Janyani","doi":"10.1016/j.diamond.2025.112357","DOIUrl":"10.1016/j.diamond.2025.112357","url":null,"abstract":"<div><div>The paper demonstrates the modeling and design of a surface plasmon resonance (SPR) sensor for gas detection, utilizing an ITO-Ag-Si hybrid nanostructure with a graphene layer. The performance of the designed structure is investigated through an angular interrogation of the Kretschmann configuration, which is based on multilayer modeling of the transfer matrix method (TMM). Through a comprehensive analysis of the resonance phenomena, including variations in structural parameters, the optimal values that maximize the sensitivity while minimizing signal loss are identified. The proposed sensor offers cost-effectiveness and exhibits a high sensitivity of 220<sup>o</sup>/RIU for gas analytes with refractive indices (RI) ranging from 1.00 to 1.03 at a source wave length of 633 nm. This sensitivity is 2.15 times greater than that of conventional SPR-based sensors operating in the visible spectrum. The performance of the proposed SPR sensor is analyzed using several key metrics: detection accuracy (DA), sensitivity, figure of merit (FoM), and full width at half maximum (FWHM). The analytical results show that this sensor demonstrates exceptional gas-sensing capabilities compared with those reported in previous studies.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"155 ","pages":"Article 112357"},"PeriodicalIF":4.3,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874948","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}

引用次数: 0

Enhanced performance of lithium-ion battery anodes using CuO nanorod/graphene aerogel composites 使用氧化铜纳米棒/石墨烯气凝胶复合材料提高锂离子电池阳极的性能

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-04-21 DOI: 10.1016/j.diamond.2025.112356

Esma Uzun , Mehmet Oğuz Güler , Aslıhan Güler , Deniz Kuruahmet , Sıdıka Yıldırım Gültekin , Hatice Güngör , Mustafa Mahmut Singil

In this study, CuO nanorods and CuO/graphene aerogel (GA) composites are investigated as potential anode materials. CuO nanorods were synthesized by chemical precipitation, while the CuO/graphene aerogel hybrid was prepared by the aerogel method. Structural, morphological and electrochemical characterizations were performed, which showed enhanced performance of the CuO/GA hybrid composite. This composite structure retained 90 % of its capacitance after 500 cycles, significantly outperforming the pure CuO electrode. The unique properties of CuO's high theoretical capacity combined with graphene's superior conductivity lead to enhanced lithium storage and structural resilience. This study examines CuO nanorods combined with graphene aerogels to leverage graphene exceptional conductivity and 3D porous structure for improved performance.

引用次数: 0

Tailoring 2D PDA-Ti3C2 nanosheets doped ZnAl-layered double hydroxides (LDH) as smart anti-corrosion nanoreservoir for boosting the active/barrier function of epoxy coatings

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-04-20 DOI: 10.1016/j.diamond.2025.112353

Kang Ren , Juanqin Xue , Liangliang Su , Changbin Tang , Qiang Bi , Yongqiang Tian

This major attempt of this study constructs polydopamine functionalized Ti₃C₂ MXene doped ZnAl-layered double hydroxides nanocarriers integrated MoO₄²⁻ corrosion inhibitor (MXene-PDA@ZnAl MoO₄²⁻ LDH) using in-situ polymerization technique and excavates their active/passive anti-corrosion performances in solution and coating phases. The governable release of MoO₄²⁻, PDA, and Zn²⁺ from MXene-PDA@ZnAl MoO₄²⁻ LDH nanocontainers at the solution phase could upgrade the impedance values by 5 orders magnitude and the corrosion inhibition efficiency could reach 99.99 % toward bare metal in polarization curves. Besides, assessment of artificially scratched coatings demonstrated brilliant self-healing ability by 454 % increment in R_tot compared to pure EP after 24 h immersion in 3.5 wt% NaCl. Moreover, the intact MXene-PDA@ZnAl MoO₄²⁻ LDH coating after 10 days immersion with noticeable enhancement of 1 order magnitude exemplified promoted barrier effect compared to pure EP. The synergistic effect of barrier effect, chloride ion trapping and corrosion inhibition effect of the MXene-PDA@ZnAl MoO₄²⁻ LDH commit to the enhancement of the anti-corrosion response. Thence, the MXene-PDA@ZnAl MoO₄²⁻ LDH/EP could be applicable of an efficaciously anti-corrosion coating in the durability and dependability of coated steel surface.

{"title":"Tailoring 2D PDA-Ti3C2 nanosheets doped ZnAl-layered double hydroxides (LDH) as smart anti-corrosion nanoreservoir for boosting the active/barrier function of epoxy coatings","authors":"Kang Ren , Juanqin Xue , Liangliang Su , Changbin Tang , Qiang Bi , Yongqiang Tian","doi":"10.1016/j.diamond.2025.112353","DOIUrl":"10.1016/j.diamond.2025.112353","url":null,"abstract":"<div><div>This major attempt of this study constructs polydopamine functionalized Ti<sub>3</sub>C<sub>2</sub> MXene doped ZnAl-layered double hydroxides nanocarriers integrated MoO<sub>4</sub><sup>2−</sup> corrosion inhibitor (MXene-PDA@ZnAl MoO<sub>4</sub><sup>2−</sup> LDH) using in-situ polymerization technique and excavates their active/passive anti-corrosion performances in solution and coating phases. The governable release of MoO<sub>4</sub><sup>2−</sup>, PDA, and Zn<sup>2+</sup> from MXene-PDA@ZnAl MoO<sub>4</sub><sup>2−</sup> LDH nanocontainers at the solution phase could upgrade the impedance values by 5 orders magnitude and the corrosion inhibition efficiency could reach 99.99 % toward bare metal in polarization curves. Besides, assessment of artificially scratched coatings demonstrated brilliant self-healing ability by 454 % increment in R<sub>tot</sub> compared to pure EP after 24 h immersion in 3.5 wt% NaCl. Moreover, the intact MXene-PDA@ZnAl MoO<sub>4</sub><sup>2−</sup> LDH coating after 10 days immersion with noticeable enhancement of 1 order magnitude exemplified promoted barrier effect compared to pure EP. The synergistic effect of barrier effect, chloride ion trapping and corrosion inhibition effect of the MXene-PDA@ZnAl MoO<sub>4</sub><sup>2−</sup> LDH commit to the enhancement of the anti-corrosion response. Thence, the MXene-PDA@ZnAl MoO<sub>4</sub><sup>2−</sup> LDH/EP could be applicable of an efficaciously anti-corrosion coating in the durability and dependability of coated steel surface.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"155 ","pages":"Article 112353"},"PeriodicalIF":4.3,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874871","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}

引用次数: 0

Machine learning-guided ATR-FTIR for in-depth analysis of graphene oxide dispersions

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-04-20 DOI: 10.1016/j.diamond.2025.112352

Dmitry M. Filatov, Ivan V. Mikheev, Mikhail A. Proskurnin

The variation of graphene oxide preparation techniques and the often occurring similarity of spectral information in molecular spectroscopy data for tested samples pose challenges for reliable data interpretation, especially when conservative “manual” analysis methods are used. This work employs a machine learning (ML)–based approach to develop an algorithm to solve cluster analysis issues of the infrared spectroscopy data for the graphene oxide: as–prepared, purified (by dialysis bag), and reduced samples. We propose an ML–based model to provide fully–automated qualitative analysis and a semi–automated pipeline for functional groups speciation analysis on graphene oxide, developed by simultaneously combining statistical analysis and data processing, optimization algorithms, and applying unsupervised learning techniques. Also, the study examines the possibilities of applying ML to analyze and cluster data from UV/vis and Dynamic Light Scattering (DLS).

引用次数: 0

Construction of cactus-like BNNS@C composites with enhanced microwave absorption properties

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-04-20 DOI: 10.1016/j.diamond.2025.112354

Zhaowei Liu , Ziyun Luo , Wanyu Zhang , Yanhui Huang , Kang Zhao , Donghong Wang , Yufei Tang

Addressing growing electromagnetic pollution, carbon materials, with low density, high specific surface area, designability, and excellent dielectric properties, are strong candidates for electromagnetic wave absorption. However, their high conductivity causes poor impedance matching, severely limiting applications. By combining them with BN materials that have a low dielectric constant and controlling their morphology and interfacial bonding at the micro-nano scale, it is expected to resolve this issue. Therefore, by constructing a carbon nanoparticle coating layer on the surface of boron nitride nanosheets (BNNS), cactus-like BNNS@C composites were successfully prepared. The results indicated that the carbon nanoparticles were uniformly distributed on the surface of BNNS. Importantly, this BNNS@C composites exhibit relatively low graphitization degree, high defect content, and nitrogen doping characteristics. And at the thickness of 1.0 mm, the cactus-like BNNS@C composites achieved a minimum reflection loss value (RL_min) of −35.54 dB and an effective absorption bandwidth (EAB) of 2.86 GHz (15.14–18.00 GHz). This benefit was due to the conduction loss, dipole polarization loss, and the multiple reflection losses within the heterogeneous interfaces of the cactus-like BNNS@C composites. Therefore, this study provides a reliable reference for the preparation of lightweight and thin high-efficiency microwave absorbing composite materials.

{"title":"Construction of cactus-like BNNS@C composites with enhanced microwave absorption properties","authors":"Zhaowei Liu , Ziyun Luo , Wanyu Zhang , Yanhui Huang , Kang Zhao , Donghong Wang , Yufei Tang","doi":"10.1016/j.diamond.2025.112354","DOIUrl":"10.1016/j.diamond.2025.112354","url":null,"abstract":"<div><div>Addressing growing electromagnetic pollution, carbon materials, with low density, high specific surface area, designability, and excellent dielectric properties, are strong candidates for electromagnetic wave absorption. However, their high conductivity causes poor impedance matching, severely limiting applications. By combining them with BN materials that have a low dielectric constant and controlling their morphology and interfacial bonding at the micro-nano scale, it is expected to resolve this issue. Therefore, by constructing a carbon nanoparticle coating layer on the surface of boron nitride nanosheets (BNNS), cactus-like BNNS@C composites were successfully prepared. The results indicated that the carbon nanoparticles were uniformly distributed on the surface of BNNS. Importantly, this BNNS@C composites exhibit relatively low graphitization degree, high defect content, and nitrogen doping characteristics. And at the thickness of 1.0 mm, the cactus-like BNNS@C composites achieved a minimum reflection loss value (RL<sub>min</sub>) of −35.54 dB and an effective absorption bandwidth (EAB) of 2.86 GHz (15.14–18.00 GHz). This benefit was due to the conduction loss, dipole polarization loss, and the multiple reflection losses within the heterogeneous interfaces of the cactus-like BNNS@C composites. Therefore, this study provides a reliable reference for the preparation of lightweight and thin high-efficiency microwave absorbing composite materials.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"155 ","pages":"Article 112354"},"PeriodicalIF":4.3,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860298","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}

引用次数: 0

Scalable fabrication of C/CoNi composites for high-efficiency microwave absorption

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-04-20 DOI: 10.1016/j.diamond.2025.112355

Hong Zhang , Meishan Li , Xiaohai Li

The increasing demand for high-efficiency microwave absorbing materials, driven by the rapid advancement of communication technologies such as 5G and 6G, necessitates the development of scalable and cost-effective solutions. In this study, biomass-derived carbon has recently gained significant attention due to its sustainability and potential for large-scale production. However, achieving both lightweight properties and strong, broadband absorption performance remains a challenge. To address these challenges, we employed a simple hydrothermal synthesis method to deposit magnetic particles onto the surfaces of biomass-derived carbon, thereby producing C/CoNi composites with excellent electromagnetic wave absorption (EWA) characteristics. The uniform dispersion of magnetic particles on the biomass carbon surface enhances the interfacial polarization effect, while the introduction of CoNi significantly enhances the surface conductivity of the C/CoNi composites, thereby improving their microwave absorption performance. Consequently, these composites demonstrate outstanding EWA properties, characterized by thin-layer structures, lightweight design, wide frequency bandwidth, and high absorption efficiency. When combined with paraffin wax (30 wt% loading), the composite exhibits a minimum reflection loss (RL_min) of −54.59 dB and an effective absorption bandwidth (EAB) of 3.96 GHz. This work demonstrates the feasibility of using biomass-derived carbon for the mass production of microwave absorbers, offering a scalable and efficient solution for the development of functional materials for EWA.

{"title":"Scalable fabrication of C/CoNi composites for high-efficiency microwave absorption","authors":"Hong Zhang , Meishan Li , Xiaohai Li","doi":"10.1016/j.diamond.2025.112355","DOIUrl":"10.1016/j.diamond.2025.112355","url":null,"abstract":"<div><div>The increasing demand for high-efficiency microwave absorbing materials, driven by the rapid advancement of communication technologies such as 5G and 6G, necessitates the development of scalable and cost-effective solutions. In this study, biomass-derived carbon has recently gained significant attention due to its sustainability and potential for large-scale production. However, achieving both lightweight properties and strong, broadband absorption performance remains a challenge. To address these challenges, we employed a simple hydrothermal synthesis method to deposit magnetic particles onto the surfaces of biomass-derived carbon, thereby producing C/CoNi composites with excellent electromagnetic wave absorption (EWA) characteristics. The uniform dispersion of magnetic particles on the biomass carbon surface enhances the interfacial polarization effect, while the introduction of CoNi significantly enhances the surface conductivity of the C/CoNi composites, thereby improving their microwave absorption performance. Consequently, these composites demonstrate outstanding EWA properties, characterized by thin-layer structures, lightweight design, wide frequency bandwidth, and high absorption efficiency. When combined with paraffin wax (30 wt% loading), the composite exhibits a minimum reflection loss (RL<sub>min</sub>) of −54.59 dB and an effective absorption bandwidth (EAB) of 3.96 GHz. This work demonstrates the feasibility of using biomass-derived carbon for the mass production of microwave absorbers, offering a scalable and efficient solution for the development of functional materials for EWA.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"155 ","pages":"Article 112355"},"PeriodicalIF":4.3,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860301","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}

引用次数: 0

Polarization-preserving vortex beam and tunable focusing terahertz metasurfaces based on twin rectangular graphene patterns 基于孪生矩形石墨烯图案的偏振保全涡流束和可调谐聚焦太赫兹元表面

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-04-20 DOI: 10.1016/j.diamond.2025.112348

Jiu-sheng Li, Ri-hui Xiong, Feng-lei Guo

In order to overcome the dependence between phase modulation and incident wave polarization state, we propose a new metasurface based on twin rectangular graphene patterns. Without changing the incident wave polarization state, it can generate splitting vortex beams with variable topological charges (l = ± 1, ± 2, and ± 3), and can also serve as a focusing lens with variable focal length and focal position. By changing the Fermi level of graphene in different regions, the proposed metasurface obtains topologically adjustable vortex beams and variable focal length terahertz focusing, which becomes very flexible and simple. This dynamic polarization-preserving vortex beam and tunable focusing strategy shows great potential for flexible signal manipulation and processing in terahertz region.

引用次数: 0

A novel CNTs/Co9S8 microsphere composites with three-dimensional network structure for efficient electromagnetic wave absorption

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-04-18 DOI: 10.1016/j.diamond.2025.112351

Jing Yue , Yiting Cheng , Chunmei Zhang , Tianmiao Zhao , Hongliang Zhao , Chunxin Ma , Shaohua Jiang

A novel CNTs/Co₉S₈ microsphere nanocomposites with a three-dimensional network structure were synthesized via hydrothermal methods, which exhibited excellent electromagnetic wave absorption (EWA) properties. The physical phase composition, microscopic morphology, EWA performance and related mechanisms were deeply discussed. The incorporation of Co₉S₈ nanoparticles formed a three-dimensional conductive network within the CNTs matrix, significantly increasing the heterogeneous interfacial area, thereby enhancing both conductive and interfacial polarization losses. Additionally, the three-dimensional network structure not only enhances the mechanical stability of the material, but also provides multiple reflection and scattering paths for electromagnetic waves (EWs), which significantly improves the energy dissipation efficiency of EWs. Thanks to the synergistic effects of optimized attenuation and favorable impedance matching, the composites demonstrated excellent EWA performance, with a minimum reflection loss of −50.1 dB and an effective absorption bandwidth of 2.56 GHz at a thickness of 2.49 mm. Moreover, the composites reduced the radar cross sectional area, which is an important safeguard for their practical application in stealth technology. This work offers new insights and a theoretical basis for designing three-dimensional EWA materials.

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