Diamond and Related Materials最新文献_第10页

F-MWCNT incorporated PVP/TiO2 ternary nanocomposites for charge storage applications F-MWCNT将PVP/TiO2三元纳米复合材料用于电荷存储应用

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-03-01 Epub Date: 2026-02-02 DOI: 10.1016/j.diamond.2026.113400

Sachit K. Das , Debasrita Bharatiya , Rudra Narayan Subudhi , Ritu Saraswat , Sudhir Minz , Pijush De , Sarat K. Swain

{"title":"F-MWCNT incorporated PVP/TiO2 ternary nanocomposites for charge storage applications","authors":"Sachit K. Das , Debasrita Bharatiya , Rudra Narayan Subudhi , Ritu Saraswat , Sudhir Minz , Pijush De , Sarat K. Swain","doi":"10.1016/j.diamond.2026.113400","DOIUrl":"10.1016/j.diamond.2026.113400","url":null,"abstract":"<div><div>The effect of functionalized MWCNT (f-MWCNT) on dielectric behaviour of PVP/TiO<sub>2</sub> and PVP/TiO<sub>2</sub>/f-MWCNT ternary nanocomposites is studied in order to project the material for charge storage applications. The designed PVP/TiO<sub>2</sub> binary nanocomposite has a maximum dielectric constant value of 2.8 × 10<sup>2</sup> at frequency of 10<sup>2</sup> Hz. The highest dielectric permittivity of 2.22 × 10<sup>3</sup> with minimal loss of 2.66 is observed for PVP/TiO<sub>2</sub>/f-MWCNT nanocomposite at frequency of 10<sup>2</sup> Hz, respectively. The highest σ<sub>ac</sub> conductivity values of 4.45 × 10<sup>−5</sup> S/m and 4.83 × 10<sup>−3</sup> S/m are obtained at 1 MHz for PVPT-5 and PVPTM-5 nanocomposites. The grain resistance of ternary nanocomposite is significantly reduced with the addition of f-MWCNT as compared to the binary nanocomposite. The improved surface area, high dielectric constant, minimal loss, and reduced grain resistance are the significant factors that make this designed PVP/TiO<sub>2</sub>/f-MWCNT nanocomposite worth towards electronics and charge storage applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113400"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146184735","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}

引用次数: 0

Optically induced heating in diamond based thermometers 金刚石基温度计的光诱导加热

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-03-01 Epub Date: 2026-02-06 DOI: 10.1016/j.diamond.2026.113411

Md Shakhawath Hossain , Jiatong Xu , Thi Ngoc Anh Mai , Nhat Minh Nguyen , Trung Vuong Doan , Chaohao Chen , Qian Peter Su , Yongliang Chen , Evgeny Ekimov , Toan Dinh , Xiaoxue Xu , Toan Trong Tran

{"title":"Optically induced heating in diamond based thermometers","authors":"Md Shakhawath Hossain , Jiatong Xu , Thi Ngoc Anh Mai , Nhat Minh Nguyen , Trung Vuong Doan , Chaohao Chen , Qian Peter Su , Yongliang Chen , Evgeny Ekimov , Toan Dinh , Xiaoxue Xu , Toan Trong Tran","doi":"10.1016/j.diamond.2026.113411","DOIUrl":"10.1016/j.diamond.2026.113411","url":null,"abstract":"<div><div>Fluorescence nanothermometers—widely used from microelectronics to cell biology—face a critical yet often overlooked challenge: both their calibration and actual temperature readout can be significantly distorted by laser-induced heating on substrates with poor thermal conductivity or surface contamination. Here, we report a systematic investigation of how substrate thermal conductivity and interfacial polymer layers influence laser-induced heating of silicon-vacancy (SiV<sup>−</sup>) diamonds used as fluorescence-based secondary thermometers. Using substrates spanning several orders of magnitude in thermal conductivity and different thickness polymer layers between the sensor and the surface, we quantify the temperature rise of the diamonds relative to room temperature. Results reveal that under identical excitation conditions, bulk diamond—the highest-conductivity substrate exhibits only a negligible temperature rise (ΔT ≈ 0.95 °C), whereas thin amorphous holey carbon—the lowest-conductivity substrate studied induces an extreme increase of ΔT ∼530 °C. Furthermore, the presence of an interfacial polymer layer leads to a substantial temperature rise of ∼60 °C, in stark contrast to the near-zero heating observed on clean substrates (ΔT ≈ 0.02 °C). Experimental findings are further validated using COMSOL Multiphysics simulations with a steady-state 3D heat transfer model. Our work provides practical guidelines for substrate selection, surface preparation, and calibration methodology for nanoscale thermometry.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113411"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185249","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}

引用次数: 0

Enhanced structural and chemical stability of hydrogen-terminated a-C:H films under compression 压缩条件下端氢a-C:H膜的结构和化学稳定性增强

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-03-01 Epub Date: 2026-01-22 DOI: 10.1016/j.diamond.2026.113359

Ayumu Takada , Noboru Miyata , Kenji Hirakuri , Yasuharu Ohgoe

{"title":"Enhanced structural and chemical stability of hydrogen-terminated a-C:H films under compression","authors":"Ayumu Takada , Noboru Miyata , Kenji Hirakuri , Yasuharu Ohgoe","doi":"10.1016/j.diamond.2026.113359","DOIUrl":"10.1016/j.diamond.2026.113359","url":null,"abstract":"<div><div>Diamond-like carbon (DLC) films are valued for their toughness, low reactivity, and gas barrier properties, making them essential in applications ranging from mechanical components such as strain gauges to biomedical devices like artificial blood vessels. The deposition method and hydrogen content significantly influence their structural and chemical behavior. Therefore, in this study, we investigated the role of hydrogen termination in enhancing the structural and electrical stabilities of DLC films under compression. X-ray photoelectron spectroscopy (XPS), conductivity measurements, and neutron reflectometry (NR) analyses were performed on high‑hydrogen-content amorphous hydrogenated carbon (a-C:H) films and low-hydrogen-content sputtered a-C(:H) films. Understanding this phenomenon could lead to product life extension and performance improvements, allowing the application of DLCs as high-performance coating materials. XPS film depth analysis of a-C:H showed that the C<img>O bonding in each layer was under 3%, suggesting that the film was not easily affected by oxygen exposure. Furthermore, conductivity measurements indicate that the a-C:H films prepared through chemical vapor deposition were insulating and exhibited better structural and electrical stabilities under compression than sputtered a-C(:H) films. NR results enabled the visualization of structural changes inside the films under compressive loading, providing new insights into improving the stability of DLC films. NR also showed that the change in scattering length density under pressure loading was small, indicating structural stability. These findings emphasize the importance of hydrogen termination for improving the durability and functionality of DLC films, which are typically used in high-performance coatings.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113359"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185252","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}

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

Diamond and Related Materials Pub Date : 2026-03-01 Epub Date: 2026-01-19 DOI: 10.1016/j.diamond.2026.113350

Bandana Priyadarshini, Amitava Ghosh

{"title":"Potential of diamond and tungsten disulfide water-based hybrid nanofluid aerosols at abrasive tool-work tribo-interfaces as lubricant medium and mechanism of lubrication","authors":"Bandana Priyadarshini, Amitava Ghosh","doi":"10.1016/j.diamond.2026.113350","DOIUrl":"10.1016/j.diamond.2026.113350","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113350"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036771","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}

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

Diamond and Related Materials Pub Date : 2026-03-01 Epub Date: 2026-01-19 DOI: 10.1016/j.diamond.2026.113335

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

{"title":"Hierarchically organized carbon-modified sea-urchin NiCo2O4 electrodes for high-performance symmetric supercapacitors","authors":"Ritesh Kumar , Shweta Tanwar , Shivani Kalia , Diksha , Rajesh K. Singh , A.L. Sharma","doi":"10.1016/j.diamond.2026.113335","DOIUrl":"10.1016/j.diamond.2026.113335","url":null,"abstract":"<div><div>Systematic experimental studies were conducted to engineer optimized composite electrode structures for high-performance supercapacitors. Sea urchin-shaped NiCo<sub>2</sub>O<sub>4</sub> (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<sup>−1</sup> at discharge current density of 2 A g<sup>−1</sup>, and exceptional energy density of 29.4 Wh kg<sup>−1</sup> and power density of 4000 W kg<sup>−1</sup>. 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 NiCo<sub>2</sub>O<sub>4</sub> as an effective electrode material for prospective high-energy technologies.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113335"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036765","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}

引用次数: 0

Study on the mechanism of nano-Fe3O4-assisted magnetorheological polishing of silicon carbide 纳米fe3o4辅助磁流变抛光碳化硅的机理研究

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-03-01 Epub Date: 2026-02-11 DOI: 10.1016/j.diamond.2026.113439

Jingdong Zhang , Chong Luo , Yuhang Qi , Lipu Han , Bibo Yu

{"title":"Study on the mechanism of nano-Fe3O4-assisted magnetorheological polishing of silicon carbide","authors":"Jingdong Zhang , Chong Luo , Yuhang Qi , Lipu Han , Bibo Yu","doi":"10.1016/j.diamond.2026.113439","DOIUrl":"10.1016/j.diamond.2026.113439","url":null,"abstract":"<div><div>This study presents the development of a novel green chemical-mechanical magnetorheological finishing (CMMRF) slurry composed of nano-Fe<sub>3</sub>O<sub>4</sub>, iron powder, hydrogen peroxide, diamond micropowder, and deionized water. The experimental results show that under a 0.3 T external magnetic field, the material removal rate (MRR) of single-crystal silicon carbide on its carbon face (c-face) using a mixed abrasive slurry reached 7665.7 nm/h, an increase of 77.3% compared to using a single iron abrasive. Meanwhile, the surface roughness achieved with the mixed abrasive slurry was 0.103 nm, a reduction of 51.6% from the 0.213 nm obtained with the single iron abrasive. Furthermore, the effective collection of particles from the post-polishing waste liquid via a magnetic field verified its unique eco-friendly characteristics. Characterization techniques including electron paramagnetic resonance (EPR), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), and transmission electron microscopy (TEM) line scanning revealed that, during the CMMRF process, the magnetic abrasives not only generated hydroxyl radicals but also formed Fe–O–Si chemical bonds with the silica oxide layer, which contributed to the acceleration of the material removal rate.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113439"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147421648","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}

引用次数: 0

The effect of hydrogen, argon and acetylene on the evolution of nitrogen-doped carbon dots into carbon sheets and spheres 氢、氩和乙炔对氮掺杂碳点向碳片和碳球演化的影响

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-03-01 Epub Date: 2026-02-03 DOI: 10.1016/j.diamond.2026.113365

Kamogelo Modisane , Daniel Wamwangi , Neil J. Coville , Manoko S. Maubane-Nkadimeng

{"title":"The effect of hydrogen, argon and acetylene on the evolution of nitrogen-doped carbon dots into carbon sheets and spheres","authors":"Kamogelo Modisane , Daniel Wamwangi , Neil J. Coville , Manoko S. Maubane-Nkadimeng","doi":"10.1016/j.diamond.2026.113365","DOIUrl":"10.1016/j.diamond.2026.113365","url":null,"abstract":"<div><div>Carbon dots (CDs) are zero-dimensional nanoparticles with remarkable luminescence, tunable surface chemistry, and strong potential for energy applications. In this study, nitrogen doped carbon dots (NCDs) were synthesised via a microwave-assisted hydrothermal route using citric acid and ethylenediamine as carbon and nitrogen sources respectively is reported. The synthesised NCDs were annealed (100–800 °C) under hydrogen, acetylene, and argon atmospheres to investigate their gas-dependent morphological conversions. Hydrogen treatment promoted coalescence into amorphous rippled nanosheets. Acetylene facilitated early sheet formation as well as the development of smooth carbon spheres at high temperatures, attributed to C₂H₂ decomposition. In contrast, argon annealing induced a complex evolution from quasi-spherical dots to stacked sheets, followed by the synthesis of rough-surfaced spheres and interconnected chain-like spheres. In all cases XPS data revealed progressive deoxygenation with temperature, correlating with decreased photoluminescence and increased thermal stability of the products. Quantitative analysis of Raman ID/IG ratios, XPS elemental composition, and mass change indicates that the morphological evolution is governed by gas-induced deoxygenation and graphitic realignment. The results suggests that there is an ease of the NCD conversion reaction which follows the sequence hydrogen > acetylene > argon. This suggests that reducing agents assist with the conversion reaction. This work demonstrates a strategy for directing CD-to-nanosheet/sphere conversion, with potential application in energy storage, catalysis, and electronic device fabrication. This evolution is influenced not only by temperature, which governs the thermodynamics of the closed system, but also by the gaseous environment.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113365"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147421688","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}

引用次数: 0

MWCNT template-assisted synthesis of porous carbon nanofibers derived from Pandanus tectorius biomass for enhanced supercapacitor performance MWCNT模板辅助合成从蛤壳生物量中提取的多孔碳纳米纤维以增强超级电容器性能

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-03-01 Epub Date: 2026-01-26 DOI: 10.1016/j.diamond.2026.113370

Rakhmawati Farma , Irma Apriyani , Regi Suganda , Awitdrus Awitdrus , Nidya Chitraningrum , Ari Sulistyo Rini , Luqyana Adha Azwat , Apriwandi Apriwandi , Azriyenni Azhari Zakri

{"title":"MWCNT template-assisted synthesis of porous carbon nanofibers derived from Pandanus tectorius biomass for enhanced supercapacitor performance","authors":"Rakhmawati Farma , Irma Apriyani , Regi Suganda , Awitdrus Awitdrus , Nidya Chitraningrum , Ari Sulistyo Rini , Luqyana Adha Azwat , Apriwandi Apriwandi , Azriyenni Azhari Zakri","doi":"10.1016/j.diamond.2026.113370","DOIUrl":"10.1016/j.diamond.2026.113370","url":null,"abstract":"<div><div>Carbon nanofibers (CNFs) were successfully synthesized from <em>Pandanus tectorius</em> (PL) leaf waste via chemical activation with KOH, using a Multi-Walled Carbon Nanotube (MWCNT) template. This study systematically investigated the effect of CNT addition on the morphological structure and electrochemical performance of CNF-PL. Characterization results showed that increasing the MWCNT content increased the specific surface area from 528 m<sup>2</sup>/g to 632 m<sup>2</sup>/g and the oxygen content from 5.29% to 16.25%. Furthermore, the presence of O<img>H, C<img>O, C<img>O, and C<img>C functional groups improved the wettability and conductivity of the CNF-PL material. The CNF-PL cell exhibited the highest specific capacitance of 369.77 F/g at 1 mV/s in a 1 M H2SO4 electrolyte, with energy and power densities of 51.36 Wh/kg and 327.33 W/kg, respectively. These findings demonstrate the high potential of biomass waste-based carbon nanofibers as green electrodes for renewable and sustainable energy conversion and storage.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113370"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185366","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}

引用次数: 0

Performance enhancement of diamond p+–i–n+ diodes employing electron injection through heavily nitrogen–doped layers 利用电子注入通过重氮掺杂层增强金刚石p+ -i-n +二极管的性能

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-03-01 Epub Date: 2026-02-06 DOI: 10.1016/j.diamond.2026.113416

Taichi Miyazaki , Kan Hayashi , Kazuki Kobayashi , Kimiyoshi Ichikawa , Taro Yoshikawa , Satoshi Yamasaki , Takao Inokuma , Norio Tokuda , Tsubasa Matsumoto

{"title":"Performance enhancement of diamond p+–i–n+ diodes employing electron injection through heavily nitrogen–doped layers","authors":"Taichi Miyazaki , Kan Hayashi , Kazuki Kobayashi , Kimiyoshi Ichikawa , Taro Yoshikawa , Satoshi Yamasaki , Takao Inokuma , Norio Tokuda , Tsubasa Matsumoto","doi":"10.1016/j.diamond.2026.113416","DOIUrl":"10.1016/j.diamond.2026.113416","url":null,"abstract":"<div><div>Nitrogen (N) is an attractive dopant candidate for n–type diamond because it can be incorporated at higher concentrations than phosphorus, yet the practical use of N–doped n–type diamond has been hindered by poor room–temperature conductivity and large resistive losses. To improve the conductivity in diamond pin diodes with heavily N–doped n<sup>+</sup>–type layer, we fabricated two device structures with intentionally thinned intrinsic and n<sup>+</sup>–type layers: a p<sup>+</sup>–p–i–n<sup>+</sup> diode for excitonic electroluminescence (EL) and a p<sup>+</sup>–i–n<sup>+</sup> diode for high–current evaluation. The heavily N–doped n<sup>+</sup>–type layer was precisely controlled to ∼100 nm, enhancing the electric field at the metal / n<sup>+</sup>–type layer interface to facilitate effective reduction of the contact resistance. Excitonic deep–ultraviolet EL measurements confirmed electron injection and bipolar operation, exhibiting free–exciton–related emission peaks at 235 and 242 nm and a turn–on behavior around 3 V. The optimized p<sup>+</sup>–i–n<sup>+</sup> diode showed forward <em>J</em>–<em>V</em> characteristics comparable to pin diodes with phosphorus–doped n<sup>+</sup>–type layer and achieved an approximately five–orders–of–magnitude increase in forward current density compared with previously reported pin diodes with N–doped layer. Differential–resistance analysis revealed that the effective n–type contact resistance decreased to ∼10<sup>−1</sup> Ω·cm<sup>2</sup> at ∼6 V, highlighting N as a practical dopant for forming an electron–injection layer in diamond and motivating further optimization toward higher–current bipolar operation.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113416"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185642","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}

引用次数: 0

Integrations and applications of gallium oxide and diamond 氧化镓与金刚石的集成与应用

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-03-01 Epub Date: 2026-02-02 DOI: 10.1016/j.diamond.2026.113393

Jiayi Cai , Zhenglin Jia , Mingyang Yang , Mingxin Jiang , Xingqiao Chen , Yi Shen , Kazuhito Nishimura , Kuan W.A. Chee , Nan Jiang , Ping Cui , He Li , Qilong Yuan

{"title":"Integrations and applications of gallium oxide and diamond","authors":"Jiayi Cai , Zhenglin Jia , Mingyang Yang , Mingxin Jiang , Xingqiao Chen , Yi Shen , Kazuhito Nishimura , Kuan W.A. Chee , Nan Jiang , Ping Cui , He Li , Qilong Yuan","doi":"10.1016/j.diamond.2026.113393","DOIUrl":"10.1016/j.diamond.2026.113393","url":null,"abstract":"<div><div>Advances in technology drive transformative evolutions in next-generation semiconductor systems and multifunctional devices. Among ultrawide bandgap semiconductors (UWBG), Ga<sub>2</sub>O<sub>3</sub> (<em>E</em><sub>g</sub> = 4.9 eV) has emerged as a promising candidate for high-voltage power electronics (>10 kV) and solar-blind ultraviolet detection, owing to its exceptional breakdown field strength (10 MV/cm) and superior Baliga figure of merit (>3000 × silicon). However, the low thermal conductivity (<30 W·m<sup>−1</sup>·K<sup>−1</sup>) and the difficulty in achieving effective p-type doping limit the practical applications of Ga<sub>2</sub>O<sub>3</sub>. As another UWBG, diamond has the highest thermal conductivity (>2000 W·m<sup>−1</sup>·K<sup>−1</sup>) among all known bulk materials and p-type doping ability, while both of which are not achievable in Ga<sub>2</sub>O<sub>3</sub>. It can be predicted that the integration of the two materials not only ameliorates thermal management issues in Ga<sub>2</sub>O<sub>3</sub> devices, but also enables the realization of novel pn heterojunction architectures. This review summarizes the recent achievements in Ga<sub>2</sub>O<sub>3</sub>/diamond integration methods, as well as the applications of Ga<sub>2</sub>O<sub>3</sub>/diamond heterogeneous systems. Furthermore, the key challenges and future research directions are also discussed at the end of the article.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113393"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185645","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}

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