Diamond and Related Materials最新文献

{"title":"Effect of doping elements on the tribological behavior and mechanism of diamond-like carbon film under oleic acid lubrication","authors":"Kailing Ma ,&nbsp;Yuanli Kou ,&nbsp;Guangan Zhang ,&nbsp;Lunlin Shang ,&nbsp;Lin Chen ,&nbsp;Shunhua Wang ,&nbsp;Fu Wang","doi":"10.1016/j.diamond.2025.112921","DOIUrl":"10.1016/j.diamond.2025.112921","url":null,"abstract":"<div><div>Oleic acid is recognized as an excellent lubricant for diamond-like carbon (DLC) films, owing to its unique interaction with DLC surface. This study investigated the influence of doping elements on the tribological behavior and mechanism of DLC films when lubricated with oleic acid. Boron-, silicon-, chromium-, and tungsten-doped DLC films were deposited by sputtering method and characterized by Raman spectroscopy, scanning electron microscopy, and nanoindentation. The friction and wear tests were performed at varying temperatures. Friction coefficients of the B-DLC film decreased with increasing temperature, while the Si-DLC and Cr-DLC films showed increasing friction, and the W-DLC film exhibited minimal temperature dependence. Si and W doping improved the wear resistance of DLC films at evaluated temperatures. Surface analysis revealed that the tribochemical adsorption of oleic acid molecules dominated the tribological behavior of DLC films. The formation of H₃BO₃ contributed to the reduction in friction and wear of the B-DLC film. The graphitization suppression of the Si-DLC film enhanced its wear resistance. The carbide components and graphitization transition jointly affected the friction and wear of the Cr-DLC and W-DLC films, with graphitization as a beneficial factor. These findings demonstrate the distinct tribological impacts of dopants on the DLC-oleic acid composite system, offering novel insight into the solid-liquid lubrication systems with DLC films.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112921"},"PeriodicalIF":5.1,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145332473","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":"Study of localized phonon in ultrananocrystalline diamond films investigated by Raman spectroscopy","authors":"N. Kumar ,&nbsp;A.T. Kozakov ,&nbsp;Kalpataru Panda ,&nbsp;A.V. Nikolskii ,&nbsp;I.A. Milekhin ,&nbsp;E.U. Khamatdinov ,&nbsp;V.A. Volodin ,&nbsp;S.V. Goryainov ,&nbsp;A.G. Milekhin","doi":"10.1016/j.diamond.2025.112941","DOIUrl":"10.1016/j.diamond.2025.112941","url":null,"abstract":"<div><div>The study employed multiwavelength excitation (UV-ultraviolet, visible and near infrared) of Raman spectroscopy to probe resonant and non-resonant scattering mechanisms in ultrananocrystalline diamond (UNCD) films, exploring wavelength-dependent phonon dispersion, defect-activated modes, and interfacial vibrations of grain boundaries. UV excitation enhanced the diamond D* peak due to resonant coupling with zone-center optical phonons, while visible and near infrared spectra highlighted amorphous carbon (a-C)/sp²-rich grain boundary contributions (D, G, and <em>trans</em>-polyacetylene (t-PA) modes). Temperature-dependent studies (cryogenic to room temperature) demonstrated anomalous phonon behavior: the D and G bands redshift due to anharmonicity, while the <span><math><msub><mi>v</mi><mn>2</mn></msub></math></span> mode of t-PA blueshifts from reduced Peierls distortion. Laser power-dependent measurements revealed thermal strain effects, with hardening of phonon mode inducing initial blueshifts followed by thermal redshifting at higher powers. Polarization-resolved spectroscopy identifies symmetry breaking at grain boundaries, evidenced by anisotropic scattering of the <span><math><msub><mi>v</mi><mn>3</mn></msub></math></span> mode. The heat capacity of UNCD, calculated via Einstein and Debye models, deviates from bulk diamond due to low-energy vibrational and defect modes.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"160 ","pages":"Article 112941"},"PeriodicalIF":5.1,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323551","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":"The thermomechanical coupling in diamond/SiC composites","authors":"Haoxuan Wan ,&nbsp;Caimin Huang ,&nbsp;Yicong Ye ,&nbsp;Qiang Chen ,&nbsp;Daokui Li","doi":"10.1016/j.diamond.2025.112936","DOIUrl":"10.1016/j.diamond.2025.112936","url":null,"abstract":"<div><div>A developed constitutive model was established to systematically investigate the interplay of diamond/SiC composites between the thermomechanical deformation and heat transport at multiscale scope. The simulations revealed the significant enhancement of diamond reinforcements on the thermomechanical properties of performance due to its comprehensive intrinsic properties, and that moderate residual Si has limited effect on the composites in addition to reducing interfacial stress by alleviating the thermal expansion mismatch between the SiC matrix and diamond. The thermomechanical coupling in composites is the balance between the strengthening effect of diamond and the negative influence of residual Si. The findings highlight the critical role of interfacial engineering to mitigate these coupled effects for the development of high-power density electronic packaging, ensuring long-term structural integrity and efficient heat dissipation.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112936"},"PeriodicalIF":5.1,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262561","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":"Study the impact of MWCNTs and rGO on nickel cerium oxide electrode material for hybrid battery-supercapacitor device and hydrogen production","authors":"Muhammad Hamza Waris ,&nbsp;Muneerah Alomar ,&nbsp;Mohammed Jalalah ,&nbsp;Amir Muhammad Afzal ,&nbsp;Muhammad Azhar Mumtaz ,&nbsp;Sohail Mumtaz ,&nbsp;Farid A. Harraz","doi":"10.1016/j.diamond.2025.112931","DOIUrl":"10.1016/j.diamond.2025.112931","url":null,"abstract":"<div><div>Rare earth based materials have gained significant attention owing to their outstanding electrical conductivity and energy storage properties. In this work, we investigate the structural and electrochemical behavior of nanostructures composed of nickel cerium oxide (NiCe₂O₄), carbon nanotubes (CNTs), and reduced graphene oxide (rGO). NiCe₂O₄ was synthesized through a hydrothermal approach, while rGO was prepared using a modified Hummer's method. The resulting NiCe₂O₄@CNT@rGO composite electrode exhibited specific capacity (Qs) of 1523.5C g⁻¹ from the CV and 1470.6C g⁻¹ from GCD. Furthermore, the estimated specific capacitance (Cs) was 2376 F g⁻¹ from CV and 2254 F g⁻¹ from GCD measurements. In addition, a hybrid supercapattery device was assembled using NiCe₂O₄@CNT@rGO and AC electrode. This device delivered Qs of 166.1 Cg⁻¹ from the CV and 154.8 Cg⁻¹ from the GCD. The hybrid device demonstrated an impressive energy density (Ed) of 76.4 Whkg⁻¹ along with a high-power density (Pd) of 1897 Wkg⁻¹. Moreover, the NiCe₂O₄@CNT@rGO//AC system maintained 86.9 % capacity retention and 94.6 % Coulombic efficiency after 5000 cycles. Additionally, the NiCe₂O₄@CNT@rGO nanocomposite electrode exhibited excellent hydrogen evolution reaction (HER) activity, delivering a low overpotential of 32 mV and a Tafel slope of 29 mV dec⁻¹. These earth abundant composite electrodes open up promising opportunities for the development of advanced high performance hybrid energy storage device.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112931"},"PeriodicalIF":5.1,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262486","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":"Metal-organic framework ZIF-8-derived Zn/N Co-doped porous carbon for high-performance zinc-ion capacitors","authors":"Chunhui Zeng ,&nbsp;Jiaming Duan ,&nbsp;Yang Liu ,&nbsp;Xiaolei Li ,&nbsp;Lihao Zhang ,&nbsp;Qing Wu ,&nbsp;Xinyu Mo ,&nbsp;Xiaoming Zhou ,&nbsp;Miaosen Yang","doi":"10.1016/j.diamond.2025.112933","DOIUrl":"10.1016/j.diamond.2025.112933","url":null,"abstract":"<div><div>Aqueous zinc-ion capacitors offer several advantages, including enhanced power density and safety, low cost. However, the energy density of zinc-ion capacitors is still constrained by the energy storage capacity of cathode materials. In this study, we synthesized a zinc/nitrogen <em>co</em>-doped porous carbon material by utilizing an organometallic polymer as precursor and nano-silica as pore forming additive. Impressively, the analysis results reveal that prepared carbon material is equipped with the uniform distribution of Zn/N atoms, splendid specific surface area (2226.1 m² g⁻¹) and homogeneous porous architecture. The incorporation of Zn/N atoms and abundant pores enhance the ion adsorption sites of carbon materials, while also facilitating the diffusion of zinc ions. Thus, the Zn/N co-doped porous carbon as cathode material for zinc-ion capacitors delivers significantly enhanced electrochemical performance compared with the contrast sample. The dynamic behavior analysis further demonstrates that porous structures play a crucial role in activating the electrochemical performance of carbon materials. This work represents a fundamental approach for the development of cathode materials with superior electrochemical properties for zinc-ion capacitors.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112933"},"PeriodicalIF":5.1,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262559","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":"Phthalocyanine-nanodiamond conjugating mechanisms and their influence on photodynamic activity","authors":"V.R. Gudkova ,&nbsp;V. Yu. Dolmatov ,&nbsp;E. Yu. Parshina ,&nbsp;I.D. Kormschikov ,&nbsp;D.A. Gvozdev ,&nbsp;E.G. Maksimov","doi":"10.1016/j.diamond.2025.112930","DOIUrl":"10.1016/j.diamond.2025.112930","url":null,"abstract":"<div><div>In this work, we analyzed the non-covalent binding of water-soluble charged metallophthalocyanines to nanodiamonds with variable surface parameters and identified two conjugation mechanisms. The first mechanism is π-π stacking which leads to the phthalocyanine fluorescence quenching, decrease of singlet oxygen quantum yield and photodynamic efficiency against A431 cells. The second mechanism is realized by electrostatic interactions, with preservation of phthalocyanine fluorescent properties and variable singlet oxygen quantum yield depending on the stoichiometric ratio in the conjugate. In such a case the photodynamic effect was enhanced compared to phthalocyanine in the absence of nanodiamond. Results may be helpful for designing the third generation photosensitizers with nanoparticles that act as a platform for drug delivery.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112930"},"PeriodicalIF":5.1,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262480","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":"A novel ethoxy terminated diamond surface grafted via electrochemical modification","authors":"F.N. Li ,&nbsp;Y.Y. Ma ,&nbsp;J.W. Zhang ,&nbsp;H.X. Wang","doi":"10.1016/j.diamond.2025.112922","DOIUrl":"10.1016/j.diamond.2025.112922","url":null,"abstract":"<div><div>This study presents a novel electrochemical approach for fabricating ethoxy terminated diamond (EtO-diamond) surfaces through high-voltage ethoxide ion treatment in ethanol. Using X-ray photoelectron spectroscopy (XPS), we systematically characterized the voltage dependent surface chemistry, revealing a two-step grafting mechanism: hydrogen abstraction by ethoxy radicals followed by covalent bond formation, as evidenced by C<img>O and CH_<em>x</em> peaks. The applied voltage critically governs surface composition, high voltages induced competing pathways (e.g., <em>sp</em>² carbon formation). Comparative hydrogen ion treatment enhanced CH_<em>x</em> groups and avoided <em>sp</em>² carbon formation, indicating minimal oxidation.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112922"},"PeriodicalIF":5.1,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262482","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 modulation depth 3-bit graphene encoder and multi-channel optical switch based on double plasmon-induced transparency","authors":"Yi Zhang ,&nbsp;Boxun Li ,&nbsp;Lili Zeng ,&nbsp;Minghua Wang ,&nbsp;Bingwei Guo ,&nbsp;Yufan Deng ,&nbsp;Shuxin Xu ,&nbsp;Genxiang Zhong ,&nbsp;Zhengzheng Shao","doi":"10.1016/j.diamond.2025.112926","DOIUrl":"10.1016/j.diamond.2025.112926","url":null,"abstract":"<div><div>In this paper, we propose a novel structure based on a single-layer patterned graphene all-dielectric metasurface, which achieves the double plasmon-induced transparency (PIT) through triple bright mode interactions through near-field coupling. This innovative approach can be further developed into high-performance terahertz devices by dynamic modulation of the Fermi energy level and polarization sensitivity. The research results show that the 3-bit encoding function is achieved through the independent modulation of the Fermi energy level in the graphene strip. The maximum modulation depth of the encoder is 98.8 %, the minimum insertion loss is 0.11 dB, and the extinction ratio is as high as 19.1 dB. Through the synchronous modulation of the Fermi energy levels in the three sets of graphene strips, a six-frequency asynchronous optical switch is constructed. The maximum modulation depth is 97.78 % and the minimum insertion loss is 0.26 dB. To support multi-band parallel signal processing in adverse hot weather conditions, we design a four-pass-channel optical switch utilizing polarization anisotropy. By varying the polarization direction of the incident light within the range of 2.31–7.82 THz, stable switching is accomplished. In comparison to existing encoders and optical switches, the structure proposed in this paper significantly enhances coding capacity, modulation depth, extinction ratio, and insertion loss, thereby offering innovative insights for designing terahertz devices.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112926"},"PeriodicalIF":5.1,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262556","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":"A systematic study on residual stress of functionally graded PDC fabricated by powder-layering: Simulation and experimental verification","authors":"Guangqi Wang ,&nbsp;Fuxiao Zhang ,&nbsp;Yi Zhou ,&nbsp;Hao Tong ,&nbsp;Lin Xiang","doi":"10.1016/j.diamond.2025.112928","DOIUrl":"10.1016/j.diamond.2025.112928","url":null,"abstract":"<div><div>Polycrystalline diamond compact (PDC), a high-performance composite material, is synthesized by sintering high-purity diamond powder onto a WC-Co cemented carbide substrate under HTHP conditions. It exhibits exceptional performance in applications such as petroleum drilling and geological exploration. However, significant residual stresses develop within PDC during the cooling stage following synthesis, which are recognized as a primary source of PDC failure. This paper investigates gradient-structured PDC from the perspective of optimizing residual stress, combining numerical simulation with experiments. Numerical simulations were conducted to analyze the residual stress in gradient-structured polycrystalline diamond compact and the influence of gradient layer thickness on residual stress, establishing the optimal total thickness for sample fabrication. Results demonstrate that gradient-structured PDC significantly reduces residual stress magnitude and improves its distribution compared to conventional PDC, and the thicker the gradient layer, the more significant the improvement. Gradient-structured PDC samples were fabricated via the powder layer-spreading method. Through scanning electron microscopy, it was shown that the gradient layers exhibited a gradual transition morphology with good sintering between layers. EDS results confirmed the successful fabrication of the designed gradient structure, showing good agreement between the actual and intended elemental distributions. The residual stress of gradient-structured PDC was measured using laser Raman spectroscopy, and the results were consistent with the simulation. The side of the gradient layer, PCD/gradient-layer interface and WC/gradient-layer interface are all under compressive stress, indicating significant residual stress modification.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112928"},"PeriodicalIF":5.1,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262483","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 enhanced photocatalytic performance of CoFe2O4/g-C3N4/rGO ternary nanocomposites for the efficient degradation of organic contaminants","authors":"Yuwadee Leelert ,&nbsp;Elavarasan Nagaraj ,&nbsp;Orawan Rojviroon ,&nbsp;Sorapong Pavasupree ,&nbsp;Sorrawit Jirapitchworakul ,&nbsp;Ranjith Rajendran ,&nbsp;Sumonman Niamlang","doi":"10.1016/j.diamond.2025.112914","DOIUrl":"10.1016/j.diamond.2025.112914","url":null,"abstract":"<div><div>CoFe₂O₄/g-C₃N₄/rGO nanocomposites were successfully synthesized by the hydrothermal process. The structural, morphological, and optical properties of the resulting materials were comprehensively characterized and the photocatalytic performance was evaluated. XRD analysis confirmed the formation of a polycrystalline structure in the synthesized nanocomposites. FESEM and HRTEM analyses revealed nanoscale particles with well-defined morphology, confirming the successful formation of the ternary composite. Photocatalytic degradation experiments were conducted under light irradiation using Indigo Carmine (IC) and Methylene Blue (MB) dyes as model pollutants. The CoFe₂O₄/g-C₃N₄/rGO nanocomposite exhibited excellent photocatalytic activity, achieving degradation efficiencies of 96.99 % for IC and 95.98 % for MB. The corresponding reaction rate constant were calculated to be 0.0235 min⁻¹ for IC and 0.0255 min⁻¹ for MB, indicating the high degradation kinetics of the photocatalyst. The enhanced activity is attributed to effective charge separation and transfer across the heterojunction interfaces within the composite. Radical trapping experiments revealed that hydroxyl radicals (^•OH) played a dominant role in the degradation mechanism, while superoxide radicals (^•O₂⁻) and photogenerated holes (h⁺) also contributed significantly. The CoFe₂O₄/g-C₃N₄/rGO nanocomposites revealed significant bactericidal activity against <em>Escherichia coli</em> and <em>Staphylococcus aureus</em> along with excellent photocatalytic performance for degrading organic pollutants in contaminated water, highlighting their promise for both environmental remediation and antimicrobial applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112914"},"PeriodicalIF":5.1,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262562","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}