Diamond and Related Materials最新文献_第5页

Simultaneous electrochemical biosensing of theophylline and thymine in pharmaceuticals and DNA bases in meat samples using CdS/ZrO2@g-CN ternary nanocomposite-coated glassy carbon electrode 利用CdS/ZrO2@g-CN三元纳米复合涂层玻碳电极对药物中的茶碱和胸腺碱以及肉类样品中的DNA碱基进行电化学生物传感

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-01-20 DOI: 10.1016/j.diamond.2026.113338

Arumugam Poongan , Pauldurai Vasumathi , Murugan Anbarasu , N. Priyadharshini , Xiang Wang , Xingmao Jiang , Perumal Venkatesh

In this study, a new and simple electrochemical biosensor was created by modifying a glassy carbon electrode (GCE) altered with graphitic carbon nitride (g-CN) decorated with cadmium sulfide (CdS) and zirconium dioxide (ZrO₂) has been was developed and used for the voltammetric assessment of theophylline (TPE), thymine (TMN). Cyclic Voltammetry (CV) was utilized to examine the properties of the modified electrode, while Differential Pulse Voltammetry (DPV) was employed to inspect the electrochemical biosensor response of TPE and TMN on the CdS/ZrO₂@g-CN. The outcomes revealed that the TPE and TMN determination may be performed at the potential window while avoiding interference from the oxidation current peak. During optimal circumstances, the manufacturing nanocomposite sensor demonstrated outstanding results in determining TPE and TMN, exhibiting a linear dynamic ranging from 5 to 390 μM, 7 to 325.5 μM, as well as lower detection limits (S/N = 3) of 0.055and 0.064 μM, respectively. CdS/ZrO₂@g-CN/GCE sensor offered several advantages, including ease of manufacture, high sensitivity, stability, and reproducibility. The CdS/ZrO₂@g-CN/GCE enables real-time sensing of Theophylline and Thymine, with recovery results verified by HPLC standards to ensure precise and accurate quantification.

本研究利用硫化镉（cd）和二氧化锆（ZrO2）修饰石墨氮化碳（g-CN）修饰玻璃碳电极（GCE），制备了一种新型、简单的电化学生物传感器，并将其用于茶碱（TPE）、胸腺嘧啶（TMN）的伏安评价。采用循环伏安法（CV）检测改性电极的性能，采用差分脉冲伏安法（DPV）检测TPE和TMN在CdS/ZrO2@g-CN上的电化学生物传感器响应。结果表明，TPE和TMN的测定可以在电位窗口进行，同时避免氧化电流峰的干扰。在最佳条件下，所制备的纳米复合材料传感器在TPE和TMN的线性动态范围为5 ~ 390 μM， 7 ~ 325.5 μM，检测限（S/N = 3）分别为0.055和0.064 μM。CdS/ZrO2@g-CN/GCE传感器具有易于制造、高灵敏度、稳定性和可重复性等优点。CdS/ZrO2@g-CN/GCE能够实时检测茶碱和胸腺碱，回收率结果通过HPLC标准验证，确保精确和准确的定量。

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引用次数: 0

Enhanced thermal performances of high-power LED by diamond packaging 金刚石封装提高大功率LED的热性能

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-01-20 DOI: 10.1016/j.diamond.2026.113352

Sicheng Tan , Bin He , Xinqing Gao, Jiangtao Huang, Yuanmao Lai, Wang Zhang, Xiaorui Liu, Stephan Handschuh-Wang, Peigang Han

A bottleneck for high-power light emitting diodes (LEDs), laser diodes (LDs), and other high-power electronics is heat dissipation. To improve this aspect, in this study, diamond heat spreaders are used in conjunction with bonding enhanced by Ar-ion activation and TiC interlayer prior to metallization to reduce thermal resistance. Indeed, a low thermal resistance of the diamond heat spreader of 0.085 K/W was obtained, while for AlN and Al₂O₃, the thermal resistance were 0.35 K/W and 1.16 K/W, respectively. Experimental data and simulations illustrate the enhanced heat dissipation performance of the diamond heat spreader for LEDs, as temperature only reached 55.8 °C at an applied current of 3 A. The results highlight that diamond heat spreaders in conjunction with appropriate bonding strategies are an effective pathway for high-power electronics packaging.

大功率发光二极管（led）、激光二极管（ld）和其他大功率电子产品的瓶颈是散热。为了改善这方面的问题，在本研究中，在金属化之前，将金刚石导热片与ar离子活化增强的键合和TiC夹层结合使用，以降低热阻。金刚石导热片的热阻为0.085 K/W，而AlN和Al2O3导热片的热阻分别为0.35 K/W和1.16 K/W。实验数据和模拟表明，金刚石散热片的散热性能得到了增强，当施加电流为3a时，温度仅达到55.8℃。结果表明，金刚石导热片结合适当的粘接策略是高功率电子封装的有效途径。

引用次数: 0

Research on surface quality assessment using fractal dimension for two-dimensional ultrasonic-assisted grinding of unidirectional Cf/SiC composites 基于分形维数的单向Cf/SiC复合材料二维超声辅助磨削表面质量评价研究

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-01-20 DOI: 10.1016/j.diamond.2026.113351

Zhenyan Duan , Tao Chen , Yuhao Suo , Haohui Shi , Junpeng Ye

Accurately characterizing surface quality is a prerequisite for the subsequent optimization of the processing scheme when processing of composites such as carbon fiber-reinforced silicon carbide matrix composites (C_f/SiCs). Properties such as the scale-free nature of the fractal dimension make it independent of the measuring accuracy of the instrument. In this study, the surface quality characterization of C_f/SiCs after two-dimensional ultrasonic-assisted grinding (2D-UAG) was explored using fractal dimension D_s. Firstly, C_f/SiCs were classified into three fiber arrangement directions, i.e., perpendicular, longitudinal, and transverse. Secondly, the fractal characteristics of C_f/SiCs in the three fiber orientations were demonstrated. The results showed that the self-similar magnification interval of the C_f/SiCs' image with longitudinal and vertical fiber arrangement is 200×–500× magnification. In addition, C_f/SiCs with different fiber orientation directions exhibited different material removal mechanisms, which in turn affected their surface quality. C_f/SiCs with perpendicular fiber arrangement have the best machined surface quality, while C_f/SiCs with longitudinal fiber arrangement have the worst machined surface quality.

在碳纤维增强碳化硅基复合材料（Cf/ sic）加工过程中，准确表征表面质量是后续优化加工方案的前提。诸如分形维数的无标度性质等特性使其与仪器的测量精度无关。本研究利用分形维数Ds对二维超声辅助磨削（2D-UAG）后的Cf/ sic表面质量进行了表征。首先，将Cf/ sic分为垂直、纵向和横向三个光纤排列方向；其次，分析了Cf/ sic在三种纤维取向下的分形特征。结果表明：纵向和纵向光纤排列的Cf/ sic图像的自相似放大倍数为200×-500×；此外，不同纤维取向的Cf/ sic表现出不同的材料去除机制，从而影响其表面质量。纤维垂直排列的Cf/ sic的加工表面质量最好，而纤维纵向排列的Cf/ sic的加工表面质量最差。

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引用次数: 0

Citric acid and thiourea functionalized activated carbon for efficient removal of anionic and cationic dyes: A combined experimental and DFT approach 柠檬酸和硫脲功能化活性炭高效去除阴离子和阳离子染料：实验和DFT相结合的方法

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-01-20 DOI: 10.1016/j.diamond.2026.113353

Hamza Megherbi , Aghilas Brahmi , Faïza Diaba , Abdelbaki Reffas

Activated carbon (AC) is known for its excellent adsorption, which can be improved by surface and inner modification. This study investigates three key points. First, the effect of phosphoric acid impregnation (30, 60, 100, and 150 wt%) on crystallinity, surface chemistry, thermal stability, and adsorption of Methylene blue (MB) and Orange G (OG). TGA, XRD, and FT-IR results showed that phosphoric acid enhanced thermal stability, decreased crystallinity, and increased surface functional groups. These structural and chemical changes led to significant increases in adsorption capacity, from 77.126 to 514.405 mg/g for MB at pH 10 and from 16.813 to 254.900 mg/g for OG at pH 2.

Second, the effect of surface and internal modifications using Citric acid (C-ACs) and Thiourea (T-ACs) on activated carbon, including its elemental composition and morphology, were investigated through FTIR, XPS, and SEM-EDS analyses. The successful introduction of new surface functionalities was confirmed by the emergence of thiocarbonyl (HN–C=S) groups after Thiourea modification and ester (O–C=O) groups following Citric acid treatment. After modification, the adsorption capacity of OG slightly decreased to 239.029 mg/g at pH 2, whereas MB adsorption capacity further increased, reaching 536.600 mg/g at pH 10.

Finally, Density Functional Theory (DFT) and Non-Covalent Interaction (NCI) analyses provided molecular-level insight into the adsorption mechanism, demonstrating that MB exhibits higher reactivity than OG due to its lower energy gap and stronger interactions with electron-rich surface sites. π–π stacking was identified as the dominant interaction, supported by electrostatic forces, hydrogen bonding, and van der Waals interactions.

活性炭（AC）以其优异的吸附性能而闻名，可通过表面和内部改性来改善其吸附性能。本研究调查了三个关键点。首先，磷酸浸渍（30、60、100和150wt %）对亚甲基蓝（MB）和橙G （OG）的结晶度、表面化学、热稳定性和吸附的影响。TGA、XRD和FT-IR结果表明，磷酸增强了材料的热稳定性，降低了结晶度，增加了表面官能团。这些结构和化学变化导致吸附量显著增加，pH值为10时MB的吸附量从77.126 mg/g增加到514.405 mg/g， pH值为2时OG的吸附量从16.813 mg/g增加到254.900 mg/g。其次，通过FTIR、XPS和SEM-EDS分析，研究了柠檬酸（C-ACs）和硫脲（T-ACs）对活性炭表面和内部改性的影响，包括其元素组成和形貌。通过硫脲修饰后的硫羰基（HN-C =S）基团和柠檬酸处理后的酯（O - c =O）基团的出现，证实了新的表面官能团的成功引入。改性后OG的吸附量在pH 2时略有下降，为239.029 mg/g，而MB的吸附量进一步增加，在pH 10时达到536.600 mg/g。最后，密度泛函理论（DFT）和非共价相互作用（NCI）分析提供了分子水平上对吸附机理的深入了解，表明MB比OG具有更高的反应性，因为它具有更低的能隙和更强的与富电子表面位点的相互作用。π -π堆叠被确定为主要相互作用，由静电力、氢键和范德华相互作用支持。

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引用次数: 0

Saffron-derived carbon dot-embedded hyaluronic acid hydrogels for synergistic photothermal and ROS-mediated therapy of melanoma 藏红花衍生碳点嵌入透明质酸水凝胶用于光热和ros介导的黑色素瘤的协同治疗

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-01-20 DOI: 10.1016/j.diamond.2026.113336

Wenli Xu , Chang Wang , Yu Wang , Shuang Li , Dan Liu , Yuyang Cen , Xinyu Liu , Jiayi Peng , Zhengkui Zhang , Jiaojiao Zhao

Melanoma, a highly aggressive cutaneous tumor, demands the development of highly biocompatible and efficient photothermal nanomaterials to advance photothermal therapy. In this study, we synthesized saffron-derived carbon dots (S-CDs) via a solvothermal method using saffron, a traditional Chinese medicine, as the carbon source. Characterization by high-resolution transmission electron microscopy showed that the S-CDs are well-monodispersed with an average size of about 2.4 nm and exhibit a photothermal conversion efficiency of 31.9%. Under 808 nm laser irradiation, S-CDs demonstrated both concentration-dependent temperature increase and reactive oxygen species (ROS) generation. The critical role of ROS in the cytotoxic mechanism was confirmed by scavenger assays. To enhance tumor retention, we developed an injectable hydrogel (S-CDs@HA) by encapsulating S-CDs into an aldehyde-modified hyaluronic acid matrix. The hydrogel exhibited sustained release kinetics, enabling sustained release over 144 h. In a B16F10 melanoma mouse model, local administration of S-CDs@HA combined with laser irradiation significantly suppressed tumor growth, as evidenced by histopathological analysis revealing extensive necrosis and decreased proliferation. No systemic toxicity was observed based on body weight monitoring and organ histology. This work thus presents not only a novel natural product-derived photothermal agent but also delivers an injectable hydrogel platform for the synergistic photothermal and ROS-mediated therapy of melanoma.

黑色素瘤是一种高度侵袭性的皮肤肿瘤，需要开发高度生物相容性和高效的光热纳米材料来推进光热治疗。本研究以中药藏红花为碳源，采用溶剂热法制备了藏红花碳点（S-CDs）。高分辨率透射电镜表征表明，S-CDs具有良好的单分散性，平均尺寸约为2.4 nm，光热转换效率为31.9%。在808 nm激光照射下，S-CDs表现出浓度依赖的温度升高和活性氧（ROS）的生成。清除剂试验证实了活性氧在细胞毒性机制中的关键作用。为了增强肿瘤潴留，我们开发了一种可注射的水凝胶（S-CDs@HA），将S-CDs包埋在醛修饰的透明质酸基质中。在B16F10黑色素瘤小鼠模型中，局部给药S-CDs@HA联合激光照射显著抑制肿瘤生长，组织病理学分析显示广泛坏死和增殖减少。根据体重监测和器官组织学，未观察到全身毒性。因此，这项工作不仅提出了一种新的天然产物衍生的光热剂，而且提供了一种可注射的水凝胶平台，用于光热和ros介导的黑色素瘤的协同治疗。

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引用次数: 0

Application of an unmodified boron-doped diamond electrode for the determination of tolnaftate in pharmaceutical samples and artificial sweat samples 未经修饰的掺硼金刚石电极测定药物样品和人工汗液样品中的丙戊酸盐

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-01-20 DOI: 10.1016/j.diamond.2026.113340

Katarzyna Mielech-Łukasiewicz , Paulina Danilczyk

The work presents a new procedure of determination of an antifungal agent tolnaftate (TLN). A quick and simple analysis is proposed, based on the reaction of electrochemical oxidation of the studied analyte on a first-time used bare boron-doped diamond electrode. Before the measurement, the BDD electrode was subject to procedure, which, however, involved an innovative approach of multiple cycling in electrolyte with 0.1 mol/L solution of NaClO₄, in the potential range from −2.9 V to +0.3 V. Sensitive and accurate determination of TLN was possible on an unmodified BDD electrode with the use of square wave voltammetry (SWV), never used with this analyte before. The environment of the studied reaction was optimized in the work, and the B-R buffer with pH = 2.09 proved to be the best electrolyte. An irreversible oxidation peak was obtained in the solution at the potential of 1.3 V (vs. SCE). The analysis of the impact of scan rate on the height of TLN oxidation peak led to the conclusion that the recorded currents have a diffusion character. In the optimum conditions of SWV operation parameters, a linear range of concentrations was obtained from 4.9·10⁻⁶ to 8.6·10⁻⁵ mol/L, with LOD of 4.3·10⁻⁷ mol/L, LOQ of 1.3·10⁻⁶ mol/L, and the coefficient of determination close to one (0.9977). TLN was successfully determined in a pharmaceutical preparation and in artificial sweat. The obtained recovery of the proposed procedure was in the range from 94.95% to 100.92%.

本文提出了一种测定抗真菌药物托萘乙酸酯（TLN）含量的新方法。本文提出了一种快速、简便的分析方法，该方法基于所研究的分析物在首次使用的裸掺杂硼金刚石电极上的电化学氧化反应。在测量之前，BDD电极要经过一个程序，该程序涉及到一个创新的方法，即在−2.9 V至+0.3 V的电位范围内，在含有0.1 mol/L NaClO4溶液的电解质中多次循环。使用方波伏安法（SWV）可以在未经修饰的BDD电极上灵敏准确地测定TLN，而这种方法以前从未用于该分析物。工作中对反应环境进行了优化，pH = 2.09的B-R缓冲液为最佳电解液。溶液在1.3 V （vs. SCE）电位下出现不可逆氧化峰。通过分析扫描速率对TLN氧化峰高度的影响，得出记录电流具有扩散特征的结论。在最佳SWV操作条件下，样品浓度在4.9·10−6 ~ 8.6·10−5 mol/L范围内呈线性关系，LOD为4.3·10−7 mol/L， LOQ为1.3·10−6 mol/L，测定系数接近1（0.9977）。成功地测定了药物制剂和人工汗液中的TLN。该方法的回收率为94.95% ~ 100.92%。

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引用次数: 0

Cobalt-doped CoxMn1-xFe2O4/SWAC composites for ultra-thin and high-performance electromagnetic wave absorption 钴掺杂CoxMn1-xFe2O4/SWAC超薄高性能电磁波吸收复合材料

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-01-19 DOI: 10.1016/j.diamond.2026.113329

Zhenfei Lv , Xuejia Zhang , Chong Lan , Jiahua Gao , Junchi Weng , Haotian Fan , Xu Lu , Xiulin Shen

The intensifying electromagnetic pollution in the 5G era urgently demands the development of highly efficient electromagnetic wave (EMW) absorbing materials. This study employs a surfactant-assisted solvothermal method, utilizing methylene blue-saturated woody activated carbon (SWAC) as a sustainable carbon matrix, to successfully synthesize a series of cobalt-doped Co_xMn_1-xFe₂O₄/SWAC composites with tunable molar ratios. By optimizing the Co/Mn molar ratio, the composite exhibits outstanding microwave absorption performance at an ultra-thin thickness of just 1.34 mm when x = 0.6: minimum reflection loss (RL_min) reaches −55.67 dB, and effective absorption bandwidth (EAB) spans 2.16 GHz (15.84–18 GHz). Its matched thickness was significantly reduced by 57% compared to the control sample. The performance enhancement stems from multiscale synergistic effects induced by cobalt doping: cobalt enhances hysteresis loss and optimizes the natural resonant frequency; the difference in ionic radii between Co²⁺ and Mn²⁺ ions induces lattice distortion, promoting interfacial polarization. These mechanisms collectively optimize the material's impedance matching and attenuation capabilities, realizing a synergistic magnetoelectric loss mechanism. This study provides a novel strategy for designing lightweight, high-performance, and sustainable broadband electromagnetic wave absorbers.

5G时代日益加剧的电磁污染，迫切要求开发高效的电磁波吸收材料。本研究采用表面活性剂辅助溶剂热法，以亚甲基蓝饱和木质活性炭（SWAC）为可持续碳基质，成功合成了一系列摩尔比可调的钴掺杂CoxMn1-xFe2O4/SWAC复合材料。通过优化Co/Mn摩尔比，当x = 0.6时，该复合材料在厚度仅为1.34 mm的超薄层上表现出优异的微波吸收性能，最小反射损耗（RLmin）达到- 55.67 dB，有效吸收带宽（EAB）跨越2.16 GHz （15.84 ~ 18 GHz）。与对照样品相比，其匹配厚度显著减少了57%。性能的增强源于钴掺杂引起的多尺度协同效应：钴增强了磁滞损耗，优化了固有谐振频率；Co2+和Mn2+离子的离子半径差异引起晶格畸变，促进界面极化。这些机制共同优化了材料的阻抗匹配和衰减能力，实现了协同的磁电损耗机制。本研究为设计轻量化、高性能和可持续的宽带电磁波吸收器提供了一种新的策略。

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引用次数: 0

Hierarchically organized carbon-modified sea-urchin NiCo2O4 electrodes for high-performance symmetric supercapacitors 用于高性能对称超级电容器的分层组织碳修饰海胆NiCo2O4电极

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-01-19 DOI: 10.1016/j.diamond.2026.113335

Ritesh Kumar , Shweta Tanwar , Shivani Kalia , Diksha , Rajesh K. Singh , A.L. Sharma

Systematic experimental studies were conducted to engineer optimized composite electrode structures for high-performance supercapacitors. Sea urchin-shaped NiCo₂O₄ (NICO) nanostructures were combined with two carbonaceous materials, activated carbon (AC) and multi-walled carbon nanotubes (MWCNTs), to maximize electrochemical properties. NICO/AC and NICO/MWCNT composites were fabricated using a physical blending technique. The two symmetric supercapacitor cell configurations NICO/AC||NICO/AC and NICO/MWCNT||NICO/MWCNT were fabricated. Among the above devices, the NICO/MWCNT-based device exhibited superior electrochemical performance with a high specific capacitance of 514 F g⁻¹ at discharge current density of 2 A g⁻¹, and exceptional energy density of 29.4 Wh kg⁻¹ and power density of 4000 W kg⁻¹. Notably, the device maintained 92.1% of its original capacitance after 4000 cycles with tremendous stability. Additionally, a 2032-coin cell device made of the optimized composite powered a blue LED uninterrupted for 35 min, which proves its feasibility for practical energy storage applications. These findings validate carbon-decorated sea urchin-shaped NiCo₂O₄ as an effective electrode material for prospective high-energy technologies.

为了优化高性能超级电容器的复合电极结构，进行了系统的实验研究。将海胆形状的NiCo2O4 （NICO）纳米结构与活性炭（AC）和多壁碳纳米管（MWCNTs）两种碳质材料结合，以最大限度地提高电化学性能。采用物理共混技术制备NICO/AC和NICO/MWCNT复合材料。制备了NICO/AC||NICO/AC和NICO/MWCNT||NICO/MWCNT两种对称的超级电容器电池结构。在上述器件中，NICO/ mwcnts基器件表现出优异的电化学性能，在放电电流密度为2 a g−1时具有514 F g−1的高比电容，能量密度为29.4 Wh kg−1，功率密度为4000 W kg−1。值得注意的是，该器件在4000次循环后保持了92.1%的原始电容，并具有极大的稳定性。此外，由优化的复合材料制成的2032硬币电池装置为蓝色LED不间断供电35分钟，这证明了其在实际储能应用中的可行性。这些发现证实了碳装饰海胆形状的NiCo2O4是未来高能技术的有效电极材料。

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引用次数: 0

Potential of diamond and tungsten disulfide water-based hybrid nanofluid aerosols at abrasive tool-work tribo-interfaces as lubricant medium and mechanism of lubrication 金刚石和二硫化钨水基杂化纳米流体气溶胶在磨具-工件摩擦界面作为润滑介质的潜力及润滑机理

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-01-19 DOI: 10.1016/j.diamond.2026.113350

Bandana Priyadarshini, Amitava Ghosh

The present work investigates anti-frictional characteristics of DI water-based diamond/WS₂ mono and hybrid nanofluids and explores the working mechanisms in a tribo-test which mimics real time tribo-interfaces, which evolve in an abrasive machining process. SDS is used as surfactant to produce all nanofluids to ensure stability. The hybrid nanofluid exhibited moderate zeta potential (‐40 mV) and the lowest wetting angle (33°) among all nanofluids. Anti-frictional characteristics are assessed at 10, 20 and 30 N loads using two different tribo-pair configurations. The first one is the standard ball-on-disc setup, where both ball and pin are made of AISI52100 steel. The second configuration is the customized pin-on-disc tribo-pair where a steel pin brazed with microcrystalline cBN abrasives (tool) slides against AISI 52100 steel disc (workpiece). In ball-on-disc test, WS₂ and hybrid nanofluid outperformed diamond nanofluid for reducing friction at tribo-interface at all three load conditions. In pin-on-disc configuration, which is closer to real-time condition, the maximum reduction in CoF from that in dry sliding is nearly 60%, but with diamond nanofluid at 10 N load. However, hybrid nanofluid, combining the synergistic micro–ball-bearing effect of diamond nanoparticles with the sheared exfoliation of WS₂ layers, is more effective at higher loads, achieving CoF reductions of 45% at 20 N and 40% at 30 N compared to dry sliding. Such deviation in tribological behaviour of mono and hybrid nanofluid underscores the necessity of customized tribo-pair configurations for reliable performance evaluation and proper selection of cutting fluid prior to real-time abrasive machining tests.

本文研究了DI水基金刚石/WS 2单纳米流体和混合纳米流体的抗摩擦特性，并通过模拟磨料加工过程中产生的实时摩擦界面的摩擦试验探讨了其工作机理。SDS作为表面活性剂用于生产所有纳米流体，以确保稳定性。混合纳米流体具有中等的zeta电位（‐40 mV）和最小的润湿角（33°）。使用两种不同的摩擦副配置评估了10、20和30 N载荷下的抗摩擦特性。第一种是标准的球-阀瓣设置，其中球和销都由AISI52100钢制成。第二种配置是定制的销盘摩擦副，其中用微晶cBN磨料（工具）钎焊的钢销滑动到AISI 52100钢盘（工件）。在球盘测试中，在所有三种载荷条件下，WS₂和混合纳米流体在减少摩擦界面摩擦方面都优于金刚石纳米流体。在更接近实时状态的针盘结构中，与干滑动相比，CoF的最大降幅接近60%，但金刚石纳米流体的载荷为10 N。然而，混合纳米流体结合了金刚石纳米颗粒的协同微球承载效应和WS₂层的剪切剥离，在更高的载荷下更有效，与干滑动相比，在20 N和30 N下，碳当量减少了45%和40%。单纳米流体和混合纳米流体在摩擦学行为上的这种偏差强调了定制摩擦副配置的必要性，以便在实时磨料加工测试之前进行可靠的性能评估和适当的切削液选择。

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引用次数: 0

Hot filament CVD growth of diamond sub-microcrystals with luminescent GeV− and SiV− color centers: parallel versus sequential doping with Ge and Si atoms 具有发光GeV -和SiV -色心的金刚石亚微晶体的热丝CVD生长：平行与顺序掺杂Ge和Si原子

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-01-19 DOI: 10.1016/j.diamond.2026.113347

Sergey A. Grudinkin , Kirill V. Bogdanov , Mikhail A. Baranov , Anton P. Tkach , Kirill I. Annas , Valery G. Golubev , Alexander V. Baranov

A comparative study on two methods for the synthesis of nano- and microdiamonds doped with GeV⁻ and SiV⁻ color centers, which emit simultaneously at 602 and 738 nm, was conducted. The results show that sequential doping of the growing crystal with Ge and Si atoms is preferable to parallel doping. This preference is due to the fact that the optimal growth conditions for achieving the highest emission intensity of each center differ significantly, including the methane concentration in the CH₄/H₂ gas mixture, the substrate temperature, and the growth time.

对比研究了同时发射602 nm和738 nm光的GeV -和SiV -色心掺杂纳米和微金刚石的合成方法。结果表明，在生长晶体中顺序掺杂Ge和Si原子优于平行掺杂。这种偏爱是由于实现每个中心最高排放强度的最佳生长条件存在显著差异，包括CH4/H2气体混合物中的甲烷浓度、底物温度和生长时间。

引用次数: 0