Diamond and Related Materials最新文献

{"title":"Outside Front Cover - Journal name, Cover image, Volume issue details, ISSN, Cover Date, Elsevier Logo and Society Logo if required","authors":"","doi":"10.1016/S0925-9635(26)00706-5","DOIUrl":"10.1016/S0925-9635(26)00706-5","url":null,"abstract":"","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"167 ","pages":"Article 113995"},"PeriodicalIF":5.2,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148641018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of sintering temperature on the properties of coal gangue-based vitrified bond for diamond grinding wheels: Structural evolution and molecular dynamics simulation","authors":"Ruien Yu ,&nbsp;Ziyuan Cao ,&nbsp;Zhicong Tian ,&nbsp;Yan Bao ,&nbsp;Kenan Li ,&nbsp;Xijing Zhu","doi":"10.1016/j.diamond.2026.113787","DOIUrl":"10.1016/j.diamond.2026.113787","url":null,"abstract":"<div><div>To provide a material basis for the development of low-cost vitrified bonds for diamond grinding wheels, this study utilized coal gangue as a raw material to fabricate coal gangue-based vitrified bonds and their diamond composites via geopolymerization. The influence of sintering temperature on the structural evolution and properties of the materials was systematically investigated. The crystalline phase transformation, elemental migration, interfacial bonding behavior, and microstructural evolution were analyzed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscope (SEM), combined with molecular dynamics (MD) simulations. The results indicate that 550–650 °C is a favorable sintering window for achieving balanced comprehensive performance in coal gangue-based vitrified bonds. Within this temperature range, the binder exhibits a favorable balance among flexural strength, hardness, crystalline-phase precipitation, glass-phase evolution, and interfacial bonding behavior. Within this range, crystalline-phase precipitation, glass-phase evolution, and microstructural densification were observed, resulting in a flexural strength of 37.53 MPa and a hardness of 232.15 HV. High temperatures promoted the migration of Na elements to the interface, forming an enrichment zone that enhanced the retention force of the binder on the diamond abrasives. Furthermore, MD simulations revealed that the system possessed a short-range ordered amorphous structure, with Si<img>O bonds dominating structural stability. However, elevated temperatures induced relaxation of the three-dimensional network structure and reduced stability. The diffusion behavior of Fe and Na significantly affected the interfacial structure and the densification of the Si-O-Al network. This study provides a theoretical and practical basis for the development of coal gangue-based vitrified bonds and the optimization of grinding wheel microstructures.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"166 ","pages":"Article 113787"},"PeriodicalIF":5.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148168615","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-speed response triboelectric nanogenerator based on electrospun PVDF/MXene composite nanofiber membrane","authors":"Haoming Xu ,&nbsp;Mingyao Chen ,&nbsp;Jinkun Yang ,&nbsp;Xin Qian ,&nbsp;Zhongjia Wang ,&nbsp;Jianghong You ,&nbsp;Xunmei Hu ,&nbsp;Dongsheng Chen","doi":"10.1016/j.diamond.2026.113781","DOIUrl":"10.1016/j.diamond.2026.113781","url":null,"abstract":"<div><div>In the field of self-powered sensing, the response time of Triboelectric Nanogenerator (TENG) is particularly important, which determines whether they can quickly respond to instantaneous mechanical stimuli and whether the output signals are accurate or not. The traditional TENG based on polyvinylidene fluoride (PVDF) often leads to the slow response time due to the slow charge movement and the interface damping effect. In order to solve these problems, two-dimensional MXene nanoplates are added to one-dimensional PVDF nanofiber network, thus a multi-dimensional cooperative dielectric-conductive composite structure is built.</div><div>The addition of MXene provides an efficient channel for charge transfer, which greatly enhances the interfacial polarization and carrier mobility. In addition, by optimizing the electrospinning process, it promotes the formation of membranes with uniform fiber size and reasonable pore structure. This double lifting not only increases the surface charge density, but also reduces the air damping in the contact-separation process, thus improving the dynamic performance.</div><div>This TENG has super-fast response ability, with a response time of only 66 milliseconds and a recovery time of only 54 milliseconds. In addition to fast response, it can also produce high electrical output, with a voltage of 189 V and a current of 8.7 μA. With this ability, it can monitor and accurately distinguish various actions in real time, such as walking, running and jumping.</div><div>This research provides an effective material and structure design strategy for developing self-powered sensing systems with high response and high sensitivity, thus paving the way for their application in high-speed self-powered intelligent systems.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"166 ","pages":"Article 113781"},"PeriodicalIF":5.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148168618","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":"Arc plasma synthesis of sulfur-doped graphene flakes and impact of the doping concentration on oxygen reduction reaction","authors":"Zhaoyu Yu ,&nbsp;Haixiao Wei ,&nbsp;Shaopeng Wang ,&nbsp;Xianhui Chen ,&nbsp;Cheng Wang ,&nbsp;Weidong Xia","doi":"10.1016/j.diamond.2026.113783","DOIUrl":"10.1016/j.diamond.2026.113783","url":null,"abstract":"<div><div>The scalable and efficient production of heteroatom-doped graphene remains a significant challenge. The fast, process-efficient arc plasma gas-phase synthesis method had clear advantages for meeting this challenge. In this study, we employed a one-step, millisecond-scale rapid synthesis method to produce sulfur-doped graphene flakes using arc plasma. The plasma region's temperature was modulated by adjusting power. We generated sulfur-doped graphene flakes with varying doping concentrations. Experimental results showed that the average gas temperature rose with increasing input power. Rising temperature increased the sulfur concentration of sulfur-doped graphene flakes. Raman and XRD analyses revealed that sulfur introduction distorted the graphene lattice and generated additional defects. XPS analysis confirmed sulfur had been in the form of thiophene-S structures. Defects and heteroatoms promoted the catalytic reaction. Oxygen reduction reaction (ORR) catalytic tests were conducted on sulfur-doped graphene. The results demonstrated that the ORR activity of the sulfur-doped graphene catalyst was comparable to that of the Pt/C catalyst, exhibiting a four-electron transfer process in alkaline media. Additionally, the catalyst exhibited excellent methanol tolerance and durability. Density functional theory (DFT) calculations showed that Sulfur-doped graphene outperformed graphene, presumably because sulfur modified the spin density of adjacent carbons and reduced reaction energy barrier. This synthesis method offered a feasible solution for the large-scale production of low-cost oxygen reduction catalysts of carbon-based materials.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"166 ","pages":"Article 113783"},"PeriodicalIF":5.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148168516","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":"Boron doping-driven thermal transport modulation in graphene/diamond heterostructures","authors":"Jingfa Ma ,&nbsp;Yong Chen ,&nbsp;Ping Yang ,&nbsp;Haiying Yang","doi":"10.1016/j.diamond.2026.113782","DOIUrl":"10.1016/j.diamond.2026.113782","url":null,"abstract":"<div><div>We investigate the interfacial and in-plane heat transfer with boron (B) doping on graphene/diamond (Gr/Dia) heterostructures using a molecular dynamics simulation. The results show that the doping concentration in diamond enables a big-range modulation of the interfacial thermal conductivity (ITC). When the doping concentration was 5%, the ITC value increased by 142%. Phonon density of states analysis shows that B-doping significantly improves the thermal transport at Gr/Dia interface by enhancing low-frequency phonon coupling. Furthermore, localized high-concentration doping at the interface can enhance ITC, while the doping in regions away from the interface has a negligible effect. Regarding in-plane heat transfer, B doping reduces the in-plane thermal conductivity (TC) of both diamond and its supporting graphene, with the underlying mechanism elucidated from a phonon scattering perspective. These results have laid the foundation for the development of high-performance thermal devices.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"166 ","pages":"Article 113782"},"PeriodicalIF":5.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148168519","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":"Reactive spark plasma sintering of diamond-B4C-SiC composites: Effect of diamond size on microstructural evolution","authors":"J. Rodriguez,&nbsp;J.D. Smith,&nbsp;C. Garcia,&nbsp;T.W. Scharf","doi":"10.1016/j.diamond.2026.113784","DOIUrl":"10.1016/j.diamond.2026.113784","url":null,"abstract":"<div><div>Diamond-B₄C-SiC composites were synthesized at 1600 °C via reactive spark plasma sintering of SiB₆ and 30 wt% diamond powder blends. This processing route leverages the surface graphitization of metastable diamond to provide a free carbon source for the in-situ formation of SiC and B₁₂ (C,Si,B)₃ reaction products. The investigation focused on the role of diamond particle size (D₅₀ = 2.8, 12.4, 32.4, and 188.8 μm) in governing phase evolution, densification and porosity, and residual thermal cracking. Finer diamond particles (≤12.4 μm) promoted nearly complete consumption of the SiB₆ matrix due to high surface area and short inter-particle distances but resulted in elevated porosity (~4%). This behavior is attributed to rapid reaction-driven shrinkage and limited matrix flow. Conversely, the 188.8 μm diamond composite exhibited limited reaction formation and developed through-thickness macro-cracks upon cooling due to severe thermal-expansion mismatch between diamond and the SiB₆-rich matrix, which drives a size-dependent stress intensity factor that exceeds the matrix fracture toughness in coarse-grained microstructures. Optimal densification was identified for the 32.4 μm diamond composite that exhibits 0.43% porosity due to the larger inter-particle distances and increased matrix flow. This composite also fully transformed SiB₆ into B₁₂(C,Si,B)₃ and SiC with negligible residual Si.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"166 ","pages":"Article 113784"},"PeriodicalIF":5.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148168014","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":"Medjool Madina date seed-based activated carbon for high-performance supercapacitor: A comparative evaluation of date seed-derived activated carbon for supercapacitor application","authors":"Navaneeth Punnakkal,&nbsp;Muhammad Omer Aijaz,&nbsp;Ibrahim A. Alnaser,&nbsp;Mohammad Rezaul Karim","doi":"10.1016/j.diamond.2026.113734","DOIUrl":"10.1016/j.diamond.2026.113734","url":null,"abstract":"<div><div>Converting agricultural waste into valuable energy storage materials provides a sustainable and smart way to address environmental problems and meet the growing demand for developing efficient supercapacitors. In this work, we have synthesized activated carbon from six different varieties of date seeds using KOH activation and compared their physicochemical and electrochemical characteristics. Comparative analysis of these activated carbons shows that Medjool Madina date seed-based activated carbon outperforms in terms of physicochemical and electrochemical properties. A very high specific surface area of 1188.3 m² g⁻¹, an average pore size of 1.87 nm, and a pore volume of 0.556 cm³ g⁻¹ of the optimized activated carbon indicate a well-defined porous structure that directly helps for the smooth ionic movement. In comparison with other date seed-derived activated carbon considered for this study, Medjool Madina based activated carbon shows significant enhancement in specific capacitance, and the value was found to be 22.7% higher than the lowest performing sample. The fabricated symmetric supercapacitor exhibited a superior specific capacitance of 112 F g⁻¹, along with a 35 Wh kg⁻¹ specific energy density and a 2250 W kg⁻¹ specific power density at 3.0 A g⁻¹ current density. Most importantly, the symmetric supercapacitor exhibited 98.12% capacitance retention even after 15,000 continuous charge-discharge cycles. This study offers a better insight into how different varieties of date seed influence supercapacitor properties and the importance of customizing the best choice of electrode material in developing high-performance supercapacitors.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"166 ","pages":"Article 113734"},"PeriodicalIF":5.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148168616","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":"Machine learning–guided prediction of graphene layer numbers from electrochemical synthesis parameters","authors":"Hadia Shahid ,&nbsp;Zoha Zulfiqar ,&nbsp;Zafar Iqbal ,&nbsp;Atta Ullah ,&nbsp;Syed Mujtaba ul Hassan","doi":"10.1016/j.diamond.2026.113780","DOIUrl":"10.1016/j.diamond.2026.113780","url":null,"abstract":"<div><div>Precise control of number of layers in graphene is critical in order to ensure consistent properties in graphene-based applications; however, traditional characterization methods are time consuming and resource intensive. In this work, we present a machine learning–guided framework in order to predict number of layers in graphene directly from electrochemical based synthesis parameters, eliminating the need for post-synthesis spectroscopic techniques. A two-stage classification method is employed, which distinguish monolayer graphene from non-monolayer samples, followed by classification of few-layer (2–3 layers) and multilayer (≥4 layers) graphene. Using a curated dataset of 441 samples extracted from the literature, and class imbalance was addressed using the Synthetic Minority Over-sampling Technique (SMOTE). Eight different machine learning algorithms were analyzed, with XGBoost emerging as the top performer in both stages, achieving an AUC of 0.98 and an overall accuracy of 95.91% in Stage 1, and an AUC of 0.81 in Stage 2. SHAP-based interpretability analysis identified centrifugation time, electrolyte molarity, and sonication time as the most influential synthesis parameters governing layer formation outcomes. The proposed approach provides a fast, scalable, and cost-effective route for synthesis-level quality assurance of graphene, highlighting the potential of artificial intelligence in carbon materials manufacturing.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"166 ","pages":"Article 113780"},"PeriodicalIF":5.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148168013","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":"Synergistic integration of graphene and ZnMn3O7 via green hydrothermal route for high-capacitance electrodes","authors":"Pakeeza Aymen Nawaz ,&nbsp;Muhammad Boota ,&nbsp;Abdullah Almohammedi ,&nbsp;Mongi Amami ,&nbsp;Ali Mujtaba ,&nbsp;M. Naziruddin Khan ,&nbsp;Awais Ahmad ,&nbsp;Munawar Iqbal ,&nbsp;M.I. Khan","doi":"10.1016/j.diamond.2026.113739","DOIUrl":"10.1016/j.diamond.2026.113739","url":null,"abstract":"<div><div>The development of sustainable, high-performance electrode materials is critical for next-generation supercapacitors. Herein, we report a green and eco-friendly hydrothermal synthesis of ZnMn₃O₇ and Graphene@ZnMn₃O₇ nanocomposites using neem (<em>Azadirachta indica</em>) leaf extract as a natural reductant and stabilizer. X-ray Diffraction (XRD) analysis confirms successful phase integration with an optimized crystallite size of ~20.9 nm and reduced dislocation line density (2.29 × 10¹⁵ m⁻²) for the composite. Fourier Transform Infrared Spectroscopy (FTIR) reveals strong Mn–O–Zn bonding and effective graphene coupling through C<img>C vibrations. Scanning Electron Microscopy (SEM) images show a porous, flake-like interconnected morphology that suppresses agglomeration and improves electrolyte accessibility. Cyclic Voltammetry (CV) measurements show enlarged enclosed areas with mixed capacitive–diffusion-controlled charge storage behavior. Galvanostatic Charge–Discharge (GCD) results reveal that the Graphene@ZnMn₃O₇ composite delivers a high specific capacitance of 306 F g⁻¹ at 0.8 A g⁻¹ with excellent rate capability, significantly outperforming the pristine electrodes. Electrochemical Impedance Spectroscopy (EIS) analysis yields a low charge-transfer resistance of 1.19 Ω and a high ion diffusion coefficient of 7.96 × 10⁻⁹ cm² s⁻¹, confirming rapid charge transport. Overall, the synergistic graphene–ZnMn₃O₇ architecture offers strong potential for scalable, high-energy, and sustainable supercapacitor applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"166 ","pages":"Article 113739"},"PeriodicalIF":5.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148168016","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":"Thermochemical control of carbon nanotube growth in a diffusion flame using a quasi-pyrolysis chamber","authors":"Muhammad Amirrul Amin Moen ,&nbsp;Mohd Fairus Mohd Yasin ,&nbsp;Mohd Zamri Yusop ,&nbsp;Norazila Othman ,&nbsp;Nurul Adilla Mohd Subha ,&nbsp;Peer Mohamed Abdul ,&nbsp;Salma Samidin ,&nbsp;Norikhwan Hamzah","doi":"10.1016/j.diamond.2026.113777","DOIUrl":"10.1016/j.diamond.2026.113777","url":null,"abstract":"<div><div>Flame-based carbon nanotube (CNT) synthesis offers an energy-efficient, single-step alternative to conventional processes. However, coupling between heat release and heterogeneous flame chemistry often leads to early catalyst deactivation by soot encapsulation and oxidative degradation of CNTs. Therefore, this study presents the application of a quasi-pyrolysis chamber (QPC) to thermochemically isolate the CNT growth region in a diffusion flame environment from soot and direct flame interaction. The QPC is a straight stainless-steel tube fitted with a wire mesh at the inlet, positioned in a methane diffusion flame at a predetermined height above burner (HAB). The CNT growth region inside the QPC is identified using substrate-supported Ni catalysts on ceramic beads. The study shows that the gas composition within the QPC is established at the inlet and exhibit minimal axial variation within the measurement range. The CNT growth is observed to be strongly dependent on HAB, which governs the thermochemical conditions imposed at the QPC inlet. Optimal CNT growth occurs at intermediate HAB of 10 to 60 mm with temperatures range of 570 to 700 °C, while growth is suppressed at lower and higher HAB due to insufficient flame development and catalyst deactivation, respectively. Furthermore, the axial decline in CNT growth within the QPC is not limited by precursor availability or temperature, but is governed by local transport effects. Overall, the QPC enables controlled diffusion flame thermochemical conditioning via flame structure modification, providing a proof of concept for future development of continuous in-situ CNT synthesis using vapor-phase catalysts.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"166 ","pages":"Article 113777"},"PeriodicalIF":5.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148168613","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}