Diamond and Related Materials最新文献

{"title":"Three-electrode study and asymmetric device fabrication of CuZrO3/rGO nanohybrid for high performance supercapacitor","authors":"Asghar Nazir ,&nbsp;Sundas Rani ,&nbsp;Muhammad Arif ,&nbsp;Syed Imran Abbas Shah ,&nbsp;Imen Safra ,&nbsp;Kiran Tahir ,&nbsp;Waheed Ahmad","doi":"10.1016/j.diamond.2025.112427","DOIUrl":"10.1016/j.diamond.2025.112427","url":null,"abstract":"<div><div>Scientists improve energy storage technologies to meet the increasing energy crisis caused by non-renewable resources. Supercapacitors (SCs), are revolutionary energy storage system that have extended lifetime and greater power density. Here, the hydrothermal approach was adopted to synthesize CuZrO₃/rGO nanohybrid electrode for SCsCuZrO₃/rGO was evaluated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) to calculate its shape, crystal structure, and functional groups. Numerous perovskites have been employed as SCs materials, but, due to their cycle stability, rGO was included to develop the electrochemical technique of perovskites. CuZrO₃/rGO displayed a specific capacitance (C_sp) of 1376.09 F <em>g</em>⁻¹ at 1 A g⁻¹. The CuZrO₃/rGO//AC asymmetric structure showed an ideal C_sp of 211.36 F g⁻¹ with an E_d of 1578.70 W h kg⁻¹ and C_d of 1 A g⁻¹. This work shows that the CuZrO₃/rGO nanocomposite's superb features and high stability and affordability create it suitable for next-era SCs applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112427"},"PeriodicalIF":4.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946962","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":"Deposition of graphene incorporated diamond-like carbon coatings using pulsed-DC PECVD with an additional cathode for space applications","authors":"Funsho Olaitan Kolawole ,&nbsp;Elver Juan de Dios Mitma Pillaca ,&nbsp;Gislene Valdete Martins ,&nbsp;Shola Kolade Kolawole ,&nbsp;Evaldo José Corat ,&nbsp;Vladimir Jesus Trava-Airoldi","doi":"10.1016/j.diamond.2025.112422","DOIUrl":"10.1016/j.diamond.2025.112422","url":null,"abstract":"<div><div>In this study, graphene dispersed in isopropyl alcohol was incorporated into diamond-like carbon (DLC) films deposited on a 316 L stainless steel substrate using a pulsed-DC PECVD system with an ion confinement device. Graphene was introduced into the reactor at various concentrations, from 0.01 to 1.0 mg/mL, via a pulsed valve connected internally through a glass tube. Raman spectroscopy was used to analyze graphene before and after sonication, while SEM was employed to examine surface morphology, particle size distribution, and graphene coverage. Mechanical and tribological properties were evaluated under both atmospheric and high vacuum conditions. Raman analysis indicated an increase in ID/IG ratio as graphene concentration increased. The coefficient of friction (COF) decreased with increasing graphene concentration, reaching a minimum of 0.082 in atmospheric conditions (0.5 mg/mL graphene) and 0.011 in high vacuum (0.75 mg/mL graphene). The wear rate followed a similar trend, decreasing up to 0.75 mg/mL but increasing at 1.0 mg/mL due to graphene agglomeration, which promoted crack formation and higher wear. The wear mechanism for the low COF under vacuum conditions is attributed to graphene forming transfer layers on the surface of the film. Overall, DLC-graphene films exhibited superior tribological performance in a high vacuum environment compared to atmospheric conditions.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112422"},"PeriodicalIF":4.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923410","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":"Hierarchical nanoarchitectonics of ZnCO3-templated porous carbon derived from lignite alkali extract for supercapacitor applications","authors":"Xiaoming Yue,&nbsp;Yilin Wang,&nbsp;Zhiying Liu,&nbsp;Yaqing Yang,&nbsp;Jing Li,&nbsp;Quan Hou,&nbsp;Jiamei Zhu,&nbsp;Junsheng Zhu","doi":"10.1016/j.diamond.2025.112428","DOIUrl":"10.1016/j.diamond.2025.112428","url":null,"abstract":"<div><div>Three-dimension (3D) hierarchically porous carbon (HZCP) was prepared through embedding zinc carbonate particles in the carbon skeleton followed by high-temperature activation and the decomposition of zinc carbonate. Under optimal experimental conditions of a carbon source-to-template mass ratio of 1:5, an activation temperature of 700 °C, and an activation time of an hour, the three-dimensional porous carbon HZCP-5 exhibited a specific surface area of 1865.8 m² g⁻¹, with micropores accounting for 90.83 %. Used as the supercapacitor electrodes, HZCP achieved a specific capacitance of 367.63 F g⁻¹ at a current density of 1 A g⁻¹ in a three-electrode system, maintaining 270.44 F g⁻¹ at 10 A g⁻¹ with a capacitance retention rate of 73.56 %. Additionally, these advantages could enable the devised capacitor to exhibit a capacitance retention of 95.45 % after 20,000 cycles at 1 A g⁻¹.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112428"},"PeriodicalIF":4.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923408","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":"Development and fabrication of transition metal based rGO nanocomposite for ultracapacitors applications","authors":"Shaimaa A.M. Abdelmohsen ,&nbsp;Meznah M. Alanazi ,&nbsp;Lana M. Sulayem ,&nbsp;Salma Aman ,&nbsp;Hafiz Muhammad Tahir Farid ,&nbsp;Muhammad Suleman Waheed","doi":"10.1016/j.diamond.2025.112429","DOIUrl":"10.1016/j.diamond.2025.112429","url":null,"abstract":"<div><div>The demand for effective systems to store energy has been revealed by both ecological problems and energy shortages. This work talks on the creation of MnFeO₃/rGO composite by hydrothermal technique and its examination employing multiple analytical approaches for supercapacitor electrodes. A specific capacitance of 1829.3 F/g, along with an improved energy density equal to 53.1 Wh/kg at 228.4 W/kg were shown by the MnFeO₃/rGO composite at 1 A/g. Furthermore, following the 5000th cycle at 5 mV/s, the composite disclosed satisfactory CV stability and 30 h of enhanced mechanical stability. As the MnFeO₃/rGO composite's surface area was amplified via the insertion of additional active sites, its electrical features proved to have improved. In comparison to the pure materials, charge transfer resistances of 0.9 Ω and solution resistance (0.3 Ω) were discovered to be comparatively small. The production of MnFeO₃ composite with rGO highlights the value of nanocomposite towards supercapacitors and defines the significance of ferrite-based perovskites for further useful energy storage systems.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112429"},"PeriodicalIF":4.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071767","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":"Catalytic performance of detonation nanodiamonds in n-hexane conversion: Structure-activity relationship and surface chemistry effects","authors":"Anastasia S. Chizhikova,&nbsp;Anna N. Matveyeva,&nbsp;Maria O. Enikeeva,&nbsp;Nadejda A. Belskaya,&nbsp;Ekaterina Yu. Stovpiaga,&nbsp;Andrey D. Trofimuk,&nbsp;Aleksander E. Aleksenskii,&nbsp;Vadim I. Popkov,&nbsp;Alexander Ya. Vul’","doi":"10.1016/j.diamond.2025.112423","DOIUrl":"10.1016/j.diamond.2025.112423","url":null,"abstract":"<div><div>Detonation nanodiamonds (DND) have emerged as promising metal-free catalysts for hydrocarbon processing due to their high surface area, structural stability, and chemically tunable surfaces. In this study, four types of DND – commercial (DND_in), purified (DND_pur), deaggregated (DND_deag), and residual DND fraction after the deaggregation process (DND_resid) – were comprehensively characterized and tested in the catalytic conversion of n-hexane to elucidate structure–activity relationships and the effects of surface chemistry. X-ray diffraction and Raman spectroscopy confirmed a nanocrystalline diamond core with crystallite sizes from 4.2 to 5.6 nm. BET surface areas ranged from 248 to 335 m²/g, and FTIR and elemental analysis revealed a substantial decrease in oxygen-containing functional groups after purification and deaggregation (oxygen content reduced from 10.1 to 3.4 at.%), accompanied by a reduction in sp²‑carbon. Nitrogen adsorption indicated mesoporosity with pore sizes of 7–20 nm, with DND_deag exhibiting the most compact texture and highest surface accessibility. Catalytic tests at 505 °C demonstrated high selectivity (&gt;85 mol%) towards dehydrogenation and dehydrocyclization products for all samples. DND_deag showed the highest n-hexane conversion (18.3 %), followed by DND_pur (16.2 %) and DND_in (13.5 %). DND_in achieved the highest benzene selectivity (41 mol%) due to residual metal oxides, while DND_deag and DND_pur favored C2–C6 alkene formation (up to 40 mol%). These results demonstrate that increased surface area, lower sp²‑carbon content, and reduced oxygen functionalities strongly enhance catalytic performance and shift product distribution towards desired alkenes. Post-reaction analysis confirmed structural integrity and suggested that spent samples can be regenerated via mild oxidative treatment. This study highlights the potential of DND as efficient, reusable, and metal-free catalysts for sustainable hydrocarbon transformations.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112423"},"PeriodicalIF":4.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143927843","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":"Carbon-wrapped iron nitride nanoparticles: A cost-effective strategy for bifunctional electrocatalysts with enhanced HER and OER performance","authors":"Kumaresan Lakshmanan ,&nbsp;Vasanthi Palanisamy ,&nbsp;Thammasak Rojviroon ,&nbsp;Orawan Rojviroon ,&nbsp;Sanya Sirivithayapakorn","doi":"10.1016/j.diamond.2025.112414","DOIUrl":"10.1016/j.diamond.2025.112414","url":null,"abstract":"<div><div>Electrochemical water splitting is a promising method for clean hydrogen production, requiring durable, efficient, and cost-effective electrocatalysts to replace noble metals. Carbon plays a critical role in enhancing the electrochemical activity and stability of catalysts. In this study, a cost-effective method for synthesizing crystalline carbon-wrapped iron nitride (CW@Fe₂N) nanoparticles (NPs) is presented, showcasing their exceptional bifunctional electrocatalytic performance for the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and overall water splitting. The CW@Fe₂N NPs were thoroughly characterized to analyze their morphology, crystal structure, chemical composition, and surface properties, revealing a robust core-shell structure with carbon encapsulation. This crystalline carbon layer not only enhances catalytic activity but also improves the stability of the nanoparticles under electrochemical conditions. To benchmark performance, carbon-wrapped iron nanoparticles (CW@Fe NPs) were also synthesized and tested. Electrochemical analysis in alkaline media demonstrated the superior bifunctional electrocatalytic activity of CW@Fe₂N NPs, achieving current densities of 10 mA cm⁻² at overpotentials of 205 mV for OER and 94 mV for HER. The outstanding performance is attributed to the synergistic interaction between iron nitride and the crystalline carbon shell, which facilitates charge transfer and provides structural integrity. Additionally, the CW@Fe₂N catalyst exhibited excellent energy efficiency in a two-electrode system, maintaining a current density of 10 mA cm⁻² with a cell voltage of just 1.567 V. These findings highlight the potential of CW@Fe₂N NPs as scalable and highly effective electrocatalysts for sustainable hydrogen production through water splitting.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112414"},"PeriodicalIF":4.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923409","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":"Infrared radiation and thermal transfer performance of ultra-black CNT/diamond composite","authors":"Xurui Feng ,&nbsp;Zhiliang Yang ,&nbsp;Xiaolu Yuan ,&nbsp;Peng Liu ,&nbsp;Jing Guo ,&nbsp;Chao Qiu ,&nbsp;Liangxian Chen ,&nbsp;Jinlong Liu ,&nbsp;Shuangxi Song ,&nbsp;Chengming Li ,&nbsp;Junjun Wei","doi":"10.1016/j.diamond.2025.112415","DOIUrl":"10.1016/j.diamond.2025.112415","url":null,"abstract":"<div><div>This study fabricated vertical carbon nanotube (CNT)/diamond ultra-black composites via microwave plasma chemical vapor deposition. Quantitative nanoscratch tests revealed significantly enhanced interfacial adhesion between CNTs and the diamond substrate (200 μN) compared to the Si substrate (60 μN), demonstrating a 233 % adhesion improvement. In contrast to CNT/diamond without a pretreatment process (CNT/diamond (O), 200 μN), notably, Fe/diamond substrate subjected to pretreatment achieved a further 100 % adhesion of CNTs enhancement (400 μN), attributed to the formation of high-strength bonds at the Fe/diamond interface. Fourier-transform infrared spectroscopy characterization revealed exceptional radiative properties, with the composite achieving an average emissivity of 0.96 across the infrared spectrum (6–16 μm) and a 167 % improvement in emissivity stability relative to CNT/diamond (O). High-resolution infrared thermographic analysis confirmed superior thermal response characteristics of the CNT/diamond composite relative to CNT/Si. Therefore, the CNT/diamond composite demonstrates promising potential for precision radiation-calibration blackbody applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112415"},"PeriodicalIF":4.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931929","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":"Engineered GO with magnetic Iron oxide nanoparticles promotes osteogenic differentiation on 3D printed PCL scaffold","authors":"Pegah Mansoorian,&nbsp;Mozhde Ajorloo,&nbsp;Najmeh Najmoddin","doi":"10.1016/j.diamond.2025.112424","DOIUrl":"10.1016/j.diamond.2025.112424","url":null,"abstract":"<div><div>Since bone loss can pose serious health risks, developing novel therapeutic platforms that can efficiently evoke bone rehabilitation, underscores urgent need. In present research, a strategy is introduced to create a magnetic micro-milieu in poly ɛ-caprolactone (PCL) scaffolds fabricated by extrusion-based 3D printing method using superparamagnetic iron oxide nanoparticles (SPIONs) decorated on graphene oxide (GO) sheets (GO@SPIONs) to enhance bone repair. Field emission scanning electron microscopic images revealed the construction of 3D porous structure with aligned strands, desirable interconnectivity and good fidelity. Incorporation of 10 and 15 wt% GO@SPIONs improved the wettability up to 70.5 ± 3.4° and 60.4 ± 4.9°, respectively. Moreover, Young's modulus of 3D printed PCL scaffold reached the values of 42 ± 2 and 57 ± 2 MPa, respectively, by inclusion of 10 and 15 wt% GO@SPIONs. Although no sign of cytotoxicity was observed in MTT assay by inclusion of GO@SPIONs, 10 wt% GO@SPIONs had a higher performance in terms of cell viability and cell attachment. Such group also demonstrated better ALP activity and Alizarin red staining than other groups in line with previous results. The great potency of PCL scaffold containing 10 wt% GO@SPIONs for bone differentiation was proved by RT-PCR via high expression level of Runx2, COL1A1 and OCN which further confirmed by immunohistochemistry. These positive findings reveal that the creation of magnetic micro-milieu in tissue-engineered scaffolds is a working countermeasure to accelerate bone repair.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112424"},"PeriodicalIF":4.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923411","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":"Exploring barley bran as a precursor for carbon quantum dots with enhanced fluorescence characteristics","authors":"Anna Piasek ,&nbsp;Michał Zielina ,&nbsp;Marcin Banach ,&nbsp;Jolanta Pulit-Prociak","doi":"10.1016/j.diamond.2025.112421","DOIUrl":"10.1016/j.diamond.2025.112421","url":null,"abstract":"<div><div>The research described in this article deals with the synthesis of carbon quantum dots (CQDs) from barley bran including husk (BB) enriched with nitrogen by a hydrothermal-microwave method. Barley bran, as a raw material, is distinguished by its high carbon content and the presence of chemical compounds such as polysaccharides, proteins, fatty acids, and triglycerides, which contribute to the significant presence of oxygen atoms. The BB material was characterized using techniques such as Roentgen diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), dry weight analysis, scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS), and CHNOS elemental analysis. The results of XRD and FT-IR analysis were compared with those for dried CQDs, which show significant structural changes. Transmission Electron Microscopy (TEM) was used to analyze the size and structure of CQDs. The particles with a crystalline structure were characterized by an average size of 5.5 nm and a distance between crystal planes in the range of 0.19–0.28 nm. The optical properties of the CQDs particles were checked by UV–Vis spectroscopy analysis and their ability to emit light by spectrofluorimetry. The suspensions were characterized by absorption at 280 nm and fluorescence at 380 nm excitation with an emission peak base of about 200 nm and a peak maximum of 464 nm. The analysis showed that process parameters such as temperature, synthesis time, and filtrate volume significantly affect the properties of the obtained CQDs. The best fluorescence results were obtained for samples synthesized at 235 °C or 250 °C with larger filtrate volumes. Analysis of the optimization of the synthesis process showed that the best optical properties were obtained for samples prepared at 250 °C for 1 h from a filtrate volume of 40 mL. The study also underscores the need to further improve product purification procedures and reduce particle aggregation in aqueous solutions, which is an important element in improving the stability and performance of CQDs.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112421"},"PeriodicalIF":4.3,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923412","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":"Evaluation of noble metal decorated GNP reinforced Cu composite heat sinks for thermal performance of LED light","authors":"Saad Ali ,&nbsp;Faiz Ahmad ,&nbsp;Puteri Sri Melor Megat Yusoff ,&nbsp;Norhamidi Muhamad ,&nbsp;Russel J. Varley ,&nbsp;Patrick J. Masset ,&nbsp;Waseem Haider ,&nbsp;Chowdhury Ahmed Shahed","doi":"10.1016/j.diamond.2025.112417","DOIUrl":"10.1016/j.diamond.2025.112417","url":null,"abstract":"<div><div>Thermal management is critical for the durability of smart electronic devices, as high current densities generate excessive heat that fully dense heat sinks cannot effectively dissipate. Conductive and convective heat transfer methods, such as combining thermally conductive metals with cooling fans, are challenging due to compact device designs. In this study, we investigate the thermal properties of noble metal-decorated graphene nanoplatelet-reinforced Cu composites (Au-GNP/Cu, Ag-GNP/Cu, and Ag-N-GNP/Cu) with optimized porosity (i.e., lowest and highest), building on our previous work on their physical and mechanical properties. The thermal performance of these composites as heat sinks for LED lights was compared to undecorated GNP/Cu, sintered Cu, and commercial Cu. Decorated GNP/Cu composites exhibited enhanced thermal conductivity over undecorated GNP/Cu and sintered Cu, though values remained below commercial Cu due to porosity. High-porosity samples demonstrated superior cooling, with 0.1-Ag-GNP/Cu (22.94 % porosity) reducing LED operating temperatures by 15.83 % compared to sintered Cu. Sintered Cu (18.64 % porosity) also outperformed commercial Cu (0.11 % porosity), lowering LED temperatures by 8.57 %, highlighting the role of porosity in convective heat transfer. LED Luminous efficiency remained above 90 % for all composites, peaking at 97.21 % for 0.1-Ag-GNP/Cu. The study concludes that Ag-GNP/Cu composites effectively enhance thermal management through combined conductive and convective mechanisms, offering a promising solution for compact electronic devices.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112417"},"PeriodicalIF":4.3,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923416","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}