Diamond and Related Materials最新文献

{"title":"Study on process parameters of ultraviolet photocatalytic-Fenton reaction polishing of single-crystal silicon carbide based on Ag@AgCl photocatalyst","authors":"Chen Lin,&nbsp;Jiabin Lu,&nbsp;Naiyin Huang,&nbsp;Qiyuan Wu,&nbsp;Qiusheng Yan","doi":"10.1016/j.diamond.2025.112400","DOIUrl":"10.1016/j.diamond.2025.112400","url":null,"abstract":"<div><div>To address the issues of low photocatalytic activity, poor stability, and insufficient reusability of traditional photocatalyst TiO₂, a novel Ag@AgCl photocatalyst was prepared in the early stage. Under ultraviolet (UV) irradiation, the photocatalyst utilises the characteristics of photogenerated carrier separation and surface plasmon resonance effect to efficiently generate highly oxidative hydroxyl radicals, thereby significantly enhancing the photocatalytic performance, accelerating the oxidation process of single-crystal silicon carbide (SiC), and achieving its high-efficiency and high-quality processing. In this study, this novel photocatalyst was applied to the UV photocatalytic-Fenton reaction polishing of single-crystal SiC, with a focus on exploring the effects of major polishing process parameters on the surface quality and material removal rate (MRR) of single-crystal SiC. A set of polishing process parameters with high MRR and surface quality requirements were obtained. The influence of abrasive types on the surface quality and MRR of single-crystal SiC was studied by single factor experiment method, and a reasonable orthogonal optimization experiment was designed to seek better polishing process parameters. The research results indicate that the use of diamond abrasive can effectively improve the polishing effect in the UV photocatalytic-Fenton reaction polishing process of single-crystal SiC. Under the conditions of polishing pressure of 50 kPa, polishing speed of 60 rpm, diamond particle size of 200 nm, concentration of 2 wt%, H₂O₂ concentration of 5 wt%, and photocatalyst concentration of 1.8 wt%, excellent polishing effect with MRR of 1757.6 nm/h and surface roughness Ra of 0.45 nm was achieved. The UV photocatalytic-Fenton polishing technology, which is based on the Ag@AgCl photocatalyst and optimized process parameters, can achieve a high MRR while also obtaining a high-quality single-crystal SiC surface.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112400"},"PeriodicalIF":4.3,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907695","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":"Evaluations of corrosion resistance of 16 MnCr5 steel/DLC coatings with various CH4/Ar ratio in two saline environments","authors":"Mobin Dizisaz ,&nbsp;Mahboobeh Azadi ,&nbsp;Amirhossein Hafazeh ,&nbsp;Mohammad Azadi ,&nbsp;Mohammad Sadegh Agharebparast","doi":"10.1016/j.diamond.2025.112404","DOIUrl":"10.1016/j.diamond.2025.112404","url":null,"abstract":"<div><div>This study examines the corrosion behavior of diamond-like carbon (DLC) coatings applied to plasma-nitride 16MnCr5 steel in two saline environments. Two distinct DLC coatings were created with varying CH₄/Ar ratios using the plasma-enhanced chemical vapor deposition technique. The properties of the DLC coatings were assessed through electrochemical testing, Raman spectrometry, X-ray diffraction, and field emission scanning electron microscopy (FESEM). Following a 24-h exposure to a 3.5 wt% NaCl solution, the corrosion rate of the DLC coating, which was about 6 μm thick and had a high CH₄/Ar ratio of 1.5, decreased by 88 % in comparison to the steel substrate. However, a DLC coating with a thinner profile and a lower CH₄/Ar ratio demonstrated superior corrosion resistance in Ringer's solution after 1 h. The corrosion impedance for both coatings in the saline medium increased by 62–79 % relative to the steel substrate. FESEM imaging revealed that the corroded DLC coatings exhibited small pits, while the steel surface displayed larger pores and cracks when exposed to the saline solutions.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112404"},"PeriodicalIF":4.3,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143902398","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":"Electrochemical behavior of DLC-graphene deposited using a pulsed-DC PECVD with an additional cathode","authors":"Funsho Olaitan Kolawole ,&nbsp;Lais Gimenes Vernasqui ,&nbsp;Elver Juan de Dios Mitma Pillaca ,&nbsp;William Alex da Silva Magalhães ,&nbsp;Shola Kolade Kolawole ,&nbsp;Evaldo José Corat ,&nbsp;Vladimir Jesus Trava-Airoldi","doi":"10.1016/j.diamond.2025.112397","DOIUrl":"10.1016/j.diamond.2025.112397","url":null,"abstract":"<div><div>Graphene incorporated diamond-like carbon (DLC-graphene) films were deposited using pulsed-DC plasma enhanced chemical vapor deposition (PECVD) with an additional cathode system. The effect of graphene incorporation and substrate bias voltage on the microstructure, structural integrity, electrical and electrochemical properties of the DLC-graphene films were investigated by scanning electron microscopy, Raman spectroscopy, a Four-point probe, and <em>in operando</em> Raman spectroscopy during cyclic voltammetry. Graphene inclusion leads to graphene particles on the DLC surface. The Raman spectra show a rise in I_D/I_G from 0.64 to 1.51 because of an increase in the substrate bias voltage. The electrical resistivity decreased from 34.62 MΩ/m² to 89 kΩ/m² as the substrate bias voltage increased. Incorporating graphene improved the electrochemical activity and reversibility of DLC films. The effect of graphene incorporation on the electrical and electrochemical properties of the DLC films were also investigated and the best behavior was obtained for DLC-graphene deposited for two (2) different conditions at bias voltages of 1.0 kV (0.1 mg/mL graphene) and 1.5 kV (0.5 mg/mL graphene).</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112397"},"PeriodicalIF":4.3,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900433","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":"Single-step production of N-doped graphene powder from palm kernel shell at 500 °C","authors":"Siti Zubaidah Muhamad Zafir ,&nbsp;Xuan Han Lim ,&nbsp;Jiong Lee ,&nbsp;Kar Fei Chan ,&nbsp;Mohd Hafiz Dzarfan Othman ,&nbsp;Muhammad Izzuddin Abd Samad ,&nbsp;Tanemura Masaki ,&nbsp;Miyazaki Hidetoshi ,&nbsp;Mohd Zamri Mohd Yusop","doi":"10.1016/j.diamond.2025.112398","DOIUrl":"10.1016/j.diamond.2025.112398","url":null,"abstract":"<div><div>The rapid growth of the palm oil industry has led to significant waste generation, including palm kernel shells (PKS), an underutilized agricultural biomass. This study explores the sustainable conversion of PKS into graphitic and nitrogen-doped graphene through a single-step heating process at moderate temperatures. Carbonization was optimized at 450 °C and 500 °C with varying dwelling times (30, 60, and 90 min) to enhance graphitic carbon formation. Comprehensive characterization using Raman spectroscopy, thermogravimetric analysis (TGA), CHNS, X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) mapping, and X-ray photoelectron spectroscopy (XPS) was conducted to evaluate structural, thermal, and compositional features. Raman deconvolution and Tuinstra-Koenig (TK) relation calculations revealed crystallinity percentages ranging from 33.72 % to 37.00 %, with the highest graphitic order observed in the sample carbonized at 450 °C for 90 min. TGA showed that the 500 °C, 60-minute condition achieved the highest thermal stability, while XRD confirmed the presence of both amorphous carbon and crystalline mineral phases such as calcium carbonate and magnetite, explaining the 17.3 % discrepancy in elemental CHNS data. Ball milling of the 500 °C, 90-minute carbonized sample produced few-layer graphene with an I_D/I_G ratio of 0.65 and I_2D/I_G of 0.33. XPS analysis verified the incorporation of nitrogen atoms, indicating passive self-doping derived from the biomass. This study demonstrates a cost-effective, scalable, and eco-friendly route to producing nitrogen-doped graphene from PKS, addressing agricultural waste valorization while enabling promising applications in energy storage, catalysis, and environmental remediation.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112398"},"PeriodicalIF":4.3,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907810","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":"One-step synthesis of strongly stabilized yellow fluorescent carbon dots for rapid Golgi apparatus targeting and imaging","authors":"Hao Li ,&nbsp;Zihao Zhou ,&nbsp;Chuyao Ni ,&nbsp;Jianwu Xiao ,&nbsp;Jun Cao ,&nbsp;Jiaqi Pan ,&nbsp;Chaorong Li ,&nbsp;Yingying Zheng","doi":"10.1016/j.diamond.2025.112392","DOIUrl":"10.1016/j.diamond.2025.112392","url":null,"abstract":"<div><div>Targeted monitoring of the Golgi apparatus (GA) morphology and structure as well as the Golgi apparatus stress response is both essential and challenging. Golgi-targeting phenylsulfonamide-rich carbon dots (PR-CDs) with excitation-dependent, lower cytotoxicity and favorable biocompatibility were synthesized by one-step solvothermal process. Phenylsulfonamide unit which had a strong binding affinity for the inducible enzyme (cyclooxygenase-2 (COX-2)) expressed and accumulated on the Golgi apparatus surface was introduced as a Golgi-targeting moiety. PR-CDs had abundant surface functional groups (amino group, phenylsulfonamide and sulfonic acid group) and excellent fluorescence stability in complex environments (PH, amino acid, ionic liquid, polarity and viscosity). Rapid and accurate imaging of the Golgi apparatus in living cells was achieved by PR-CDs within 15 min and yielded an average Pearson's coefficient of 0.92. Additionally, efficient tracking and imaging of the Golgi apparatus during apoptosis cell death were also accomplished. The successful preparation of PR-CDs provides an innovative subcellular targeting strategy and the prepared PR-CDs could serve as excellent carriers for targeted drug delivery in the future.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112392"},"PeriodicalIF":4.3,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907811","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":"Synthesis and characterization of boron nitride reinforced alumina ceramic composites","authors":"A. Madhankumar ,&nbsp;J. Joel ,&nbsp;P. Jeyapandiarajan ,&nbsp;P. Ashwath ,&nbsp;M. Anthony Xavior","doi":"10.1016/j.diamond.2025.112396","DOIUrl":"10.1016/j.diamond.2025.112396","url":null,"abstract":"<div><div>Alumina-based composites (Al₂O₃) exhibit excellent mechanical and electrical properties. Incorporation of boron nitride (BN) further enhances these attributes, making them suitable for aerospace and automotive applications. The improved mechanical strength of these composites at high temperatures is a key attribute. The addition of BN significantly improves the heat resistance of alumina ceramics, making them well-suited for engine components and cutting tools that operate under extreme conditions. Beyond their mechanical benefits, Al₂O₃-BN composites excel as electrical insulators, with BN enhancing the material's resistance to electrical conductivity, making them a preferred choice for high-voltage and insulation applications. Ongoing research underscores the potential of these materials in future technological advancements. Experimental investigations show that varying BN content between 0 and 1 wt% results in mechanical property changes. These are supported by experimental stress-strain curves included in the results section. These composites, compacted via hydraulic pressing and sintered in an argon atmosphere at 1600 °C for 4 h, exhibit density improvements from 98.6 % to 99.3 % as BN concentration increases. The optimal BN content of 0.5 wt% yields peak performance, achieving a flexural strength of 424 MPa (an improvement of 3.41 %) and fracture resistance of 6.3 MPa·m¹/² (a 34.04 % enhancement). Additionally, Al₂O₃-BN composites demonstrate impressive wear resistance and reduced friction. A BN content of 0.25 wt% lowers wear rates and reduces the coefficient of friction (COF) by 46.11 % at room temperature and 61.30 % at elevated temperatures. To maintain these advantages, it is crucial to keep the BN content below 0.5 wt%, ensuring the optimal balance of mechanical, thermal, and tribological properties for high-performance applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112396"},"PeriodicalIF":4.3,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900429","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":"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(25)00495-9","DOIUrl":"10.1016/S0925-9635(25)00495-9","url":null,"abstract":"","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"155 ","pages":"Article 112438"},"PeriodicalIF":4.3,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070982","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":"Self-assembly graphene into fullerenes and hollow spherical graphene particles during anodic polarization of graphite","authors":"Gustavo G.C. Soares ,&nbsp;Kaue Rigolo ,&nbsp;Danilo Dini ,&nbsp;Jose Mauricio Rosolen","doi":"10.1016/j.diamond.2025.112379","DOIUrl":"10.1016/j.diamond.2025.112379","url":null,"abstract":"<div><div>This study reports the self-assembly of graphene, obtained by anodic polarization of graphite in an ethanol-water-NaOH electrolyte, into fullerenes and hollow spherical graphene particles. MALDI mass spectrometry and UV–Vis spectroscopy confirmed that smaller fullerenes (C₅₅, C₆₀) and larger species with AMU up to 1951 Da (equivalent to C₁₆₀) emerged after purification and centrifugation. SEM and AFM revealed the presence of hollow spherical particles, while HRTEM identified agglomerates of both small and giant fullerenes. During the synthesis, hydroxyl radicals (^●OH) and hydroxide ions (OH⁻) acted as co-reactants and cleaved graphite with consequent production of fullerene-based structures. This room-temperature electrochemical approach offers scalable, bottom-up synthesis of novel carbon-based nanomaterials as well as organic compounds.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112379"},"PeriodicalIF":4.3,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907812","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":"Quantitative analysis of the uniformity of CVD diamond nucleation via Kullback-Leibler divergence","authors":"Kang Zheng ,&nbsp;SaiFei Fan ,&nbsp;ShiNuo Tian ,&nbsp;Sen Zhang ,&nbsp;Ming Zhai ,&nbsp;Kang Liu ,&nbsp;JiaQi Zhu","doi":"10.1016/j.diamond.2025.112395","DOIUrl":"10.1016/j.diamond.2025.112395","url":null,"abstract":"<div><div>Chemical vapor deposition (CVD) diamonds are gaining traction in multiple sectors, yet effective quantization methods for evaluating nucleation uniformity have been limited. This limitation results in obscure when evaluating nucleation processes and patterns, potentially impeding the preparation of higher quality and larger area diamonds. To address this issue, this study leverages the Kullback-Leibler (K-L) divergence, a fundamental algorithm in artificial intelligence, to establish a novel quantification algorithm. The algorithm maps the space distribution of diamonds on the substrate to a probability distribution on a two-dimensional plane and calculates its K-L divergence from a uniform distribution. Comparative analyses of CVD diamond nuclei on silicon substrates with various pre-treatments reveal that our quantitative algorithm outperforms traditional algorithms like nucleation density and variance in terms of reliability, validity, and robustness. Additionally, this novel algorithm not only enhances the assessment of diamond nucleation quality but also holds broad potential for research involving particle distribution.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112395"},"PeriodicalIF":4.3,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904243","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":"Nanoindentation-induced plastic deformation of crystalline diamond","authors":"Xingshuo Huang ,&nbsp;Alan Salek ,&nbsp;Dougal G. McCulloch ,&nbsp;Jodie E. Bradby","doi":"10.1016/j.diamond.2025.112378","DOIUrl":"10.1016/j.diamond.2025.112378","url":null,"abstract":"","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112378"},"PeriodicalIF":4.3,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907696","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}