Carbon最新文献

{"title":"Spatially Distributed Inter-Bundle Damage Governs the Tensile Failure of Carbon Nanotube Yarns Within Polymer Matrices","authors":"Go Yamamoto,&nbsp;Sojun Nakano,&nbsp;Haruki Oyamada,&nbsp;Redha Akbar Ramadhan,&nbsp;Satoru Yoneyama,&nbsp;Yuki Sada,&nbsp;Akihisa Takeuchi,&nbsp;Masayuki Uesugi,&nbsp;Akira Kunitomo,&nbsp;Nozomu Shigemitsu","doi":"10.1016/j.carbon.2026.122218","DOIUrl":"10.1016/j.carbon.2026.122218","url":null,"abstract":"<div><div>Carbon nanotube (CNT) yarns exhibit tensile strengths comparable to or even exceeding those of high-strength polyacrylonitrile-based carbon fibers. However, the mechanisms governing the tensile failure of CNT yarns embedded in polymer matrices remain poorly understood. Therefore, in this study, the tensile failure mechanisms of CNT yarns embedded in polymer matrices were investigated using synchrotron radiation X-ray computed tomography (XCT) combined with digital volume correlation (DVC) and Raman spectroscopy upon tensile loading. DVC revealed heterogeneous strain fields within the surrounding epoxy matrix, including localized strain concentrations associated with damage sites and strain perturbations in apparently intact regions where no damage was detectable via 0.50 μm/pixel XCT. Subsequent 32 nm/pixel XCT confirmed the presence of previously undetected damage. Raman spectroscopy further revealed the heterogeneous axial-strain distributions and persistent load-bearing capacities of the damaged regions of the yarn. Therefore, load transfer between the CNT bundles progressively deteriorated in a spatially distributed manner rather than via damage localization into a single dominant fracture site. The combined observations indicated that the tensile failure of the polymer-embedded CNT yarns was governed by the progressive accumulation of spatially distributed inter-bundle damage and associated deterioration of load transfer between the CNT bundles. This failure mode fundamentally differed from that of a conventional brittle fiber, in which failure is typically characterized by localized fracture, followed by recovery of axial stress and subsequent fragmentation. These findings provide mechanistic insights for developing failure and strength prediction frameworks for hierarchical CNT-yarn composite systems.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"262 ","pages":"Article 122218"},"PeriodicalIF":12.7,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149202622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From surface roughness to interlayer engineering: Regulating interfacial thermal conductance in GaN/Diamond heterostructures","authors":"Yining Ou,&nbsp;Xiang Luo,&nbsp;Ning Hu,&nbsp;Bo Yang","doi":"10.1016/j.carbon.2026.122092","DOIUrl":"10.1016/j.carbon.2026.122092","url":null,"abstract":"<div><div>For high−power gallium nitride (GaN) electronic devices, efficient thermal management strategies are crucial. Diamond possesses the highest thermal conductance among bulk materials and is considered an ideal heat dissipation substrate for high−power chips. However, the mechanisms of interfacial heat conduction in GaN/Diamond heterojunctions are not yet fully understood. In this study, we investigated the effect of surface roughness on the interfacial thermal conductance (ITC) using non−equilibrium molecular dynamics (NEMD) simulations. The results indicate that ITC generally decreases with increasing root−mean−square (RMS) roughness, while showing a positive correlation with the number of contacting atoms. Phonon density of states (PDOS) analysis indicates that there is no strictly monotonic relationship between PDOS overlap and ITC, suggesting that traditional descriptors such as RMS and phonon matching are insufficient to fully describe ITC in the GaN/Diamond system. To overcome this limitation, a graphite interlayer was introduced between GaN and diamond to achieve covalent bonding at the coherent interface. The results show that the graphite layer effectively mitigates phonon mismatch and enhances vibrational coupling, resulting in an ITC value nearly two orders of magnitude higher than that of the original interface. These findings can provide guidance for interface design between high−power chips and heat dissipation substrate.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"261 ","pages":"Article 122092"},"PeriodicalIF":12.7,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148937498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bayesian model selection for graphite oxidation by molecular oxygen informed by new data","authors":"Kaan Kirmanoglu,&nbsp;Nicholas A. Anderson,&nbsp;Francesco Panerai,&nbsp;Kelly A. Stephani,&nbsp;Jonathan B. Freund","doi":"10.1016/j.carbon.2026.121877","DOIUrl":"10.1016/j.carbon.2026.121877","url":null,"abstract":"<div><div>Flow tube experiments and Bayesian model selection and calibration methods are used to assess kinetics models for graphite oxidation at pressures of 33 and 330<!--> <!-->Pa and temperatures from 1100 to 2284<!--> <!-->K. Bayesian methods, which are well established but not commonly used for carbon oxidation modeling, are employed to select and calibrate models based on the novel experiments. The experiments isolate high-temperature gas-surface interactions and mass loss, enabling low-computational-cost model evaluations, extensive statistical sampling, and inference methods, which evaluate oxidation rate models even though oxidation rates themselves are not directly measured. Influential reaction parameters are selected by global sensitivity analysis and parameter influence criteria. Bayesian inference is used for both parameter calibration and model class selection among three candidate model classes proposed for air–carbon ablation. The two classes with dual adsorption mechanisms, in which oxygen can adsorb strongly or weakly, are shown to be more plausible than the model with a single adsorption mechanism, though both are supported equally. All models predict that CO production increases with temperature until a peak is reached. Models with dual adsorption mechanisms differ by their prediction of CO and CO₂ product ratios. Posterior distributions of calibration parameters are constructed to quantify parameter uncertainties and model errors for uncertainty quantification when using these models.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"259 ","pages":"Article 121877"},"PeriodicalIF":12.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148638140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Outside Front Cover - Journal name, Cover image, Volume issue details, ISSN, Cover Date, Elsevier Logo and Society Logo if required","authors":"","doi":"10.1016/S0008-6223(26)00688-3","DOIUrl":"10.1016/S0008-6223(26)00688-3","url":null,"abstract":"","PeriodicalId":262,"journal":{"name":"Carbon","volume":"259 ","pages":"Article 121914"},"PeriodicalIF":12.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148638141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Optical modeling, solver, and design of macroscopic single-enantiomer carbon nanotube film and reconfigurable chiral photonic device” [Carbon 235 (2025) 120016]","authors":"Jichao Fan,&nbsp;Benjamin Hillam,&nbsp;Cheng Guo,&nbsp;Hiroyuki Fujinami,&nbsp;Koki Shiba,&nbsp;Haoyu Xie,&nbsp;Ruiyang Chen,&nbsp;Kazuhiro Yanagi,&nbsp;Weilu Gao","doi":"10.1016/j.carbon.2026.121847","DOIUrl":"10.1016/j.carbon.2026.121847","url":null,"abstract":"","PeriodicalId":262,"journal":{"name":"Carbon","volume":"259 ","pages":"Article 121847"},"PeriodicalIF":12.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148638143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Iodine-mediated in-situ growth of graphene-like films on copper powders enabling synergistic thermal, electrical, and mechanical performance","authors":"Weiyi Yang,&nbsp;Pin Tian,&nbsp;Jingmei Tao,&nbsp;Xiaofeng Chen,&nbsp;Jianhong Yi","doi":"10.1016/j.carbon.2026.121897","DOIUrl":"10.1016/j.carbon.2026.121897","url":null,"abstract":"<div><div>In-situ graphene-like (GL) reinforced Cu-matrix composites that simultaneously combine high thermal and electrical conductivities with enhanced strength are of significant interest for advanced thermal-management and electrical-conduction applications. Here, we report a low-temperature in-situ growth route for GL/Cu composites, using graphene nanosheets derived from sucrose carbonization serve as precursor. An iodine-mediated adsorption-catalysis mechanism is proposed to govern the uniform anchoring and subsequent structural evolution of graphene nanosheets on Cu powders. The formation of a CuI interfacial layer promotes the strong adsorption of graphene nanosheets. Subsequently, during the 600 °C thermal treatment, the CuI layer facilitates in-situ conversion of graphene nanosheets into continuous, <em>sp</em>^<em>2</em>-rich GL films tightly bonded to Cu (111), (220), and (200) crystallographic planes. This interfacial carbon evolution effectively suppresses interfacial thermal and electrical resistance while maintaining robust interfacial bonding. After consolidation by pressing, sintering, and hot rolling, the resulting bulk GL/Cu composites exhibit a synergistic combination of transport and mechanical properties. A high thermal conductivity of 421 W m⁻¹ K⁻¹ at 25 °C and 404 W m⁻¹ K⁻¹ at 300 °C were achieved, corresponding to an ∼42% enhancement in thermal-conductivity efficiency by 0.31 vol % GL. Notably, the electrical conductivity remains at 97% IACS, without degradation relative to pure Cu, while the tensile strength reaches 290 MPa, representing an increase of ∼35% compared with pure Cu (215 MPa). This work elucidates an interfacial-catalysis-driven mechanism for the in-situ evolution of GL on copper and demonstrates its effectiveness in achieving synergistic optimization of thermal, electrical, and mechanical properties in Cu-matrix composites.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"259 ","pages":"Article 121897"},"PeriodicalIF":12.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148638074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"VICIOXITE: A CARBON MATERIAL CONTAINING ADJACENT OH GROUPS FOR CO2 AND H2O CAPTURE","authors":"Kota Kondo ,&nbsp;Itsuki Takahashi ,&nbsp;Kai Kan ,&nbsp;Kazuma Gotoh ,&nbsp;Tetsuro Soejima ,&nbsp;Sota Nakamura ,&nbsp;Satoshi Sato ,&nbsp;Tomonori Ohba ,&nbsp;Yasuhiro Yamada","doi":"10.1016/j.carbon.2026.121741","DOIUrl":"10.1016/j.carbon.2026.121741","url":null,"abstract":"","PeriodicalId":262,"journal":{"name":"Carbon","volume":"257 ","pages":"Article 121741"},"PeriodicalIF":12.7,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148342730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of NiSe2/Ni3B2O6 heterostructures on electrospun carbon nanofibers for high-performance supercapacitor and hydrogen evolution reaction","authors":"Guanghui Li,&nbsp;Lanrui Yin,&nbsp;Xingmei Duan,&nbsp;Changfu Zhuang,&nbsp;Yimo Xiang,&nbsp;Di Tian","doi":"10.1016/j.carbon.2026.121760","DOIUrl":"10.1016/j.carbon.2026.121760","url":null,"abstract":"<div><div>Heterostructured engineering is driving advancements in supercapacitor and hydrogen evolution reaction (HER). In this work, a NiSe₂/Ni₃B₂O₆ heterostructure on electrospun carbon nanofibers was fabricated as a dual-functional material. The NiSe₂/Ni₃B₂O₆ heterojunction with favorable electronic distribution and the well-dispersed active sites supported by electrospun carbon nanofibers, facilitate conductivity, stability and reaction kinetics. CCo@NiSe@NiBO, belonging to an energy storage mechanism dominated by diffusion control, showed a specific capacitance of 984.0 F g⁻¹, and a capacitance retention of 42.68 % when the current density increases by 20 times, which exceeds that of many reported Ni based selenides and borides. Meanwhile, CCo@NiSe@NiBO as a HER catalyst achieved overpotentials of 227 mV at 10 mA cm⁻² and Tafel slopes of 91.2 mV dec⁻¹. DFT calculations revealed its optimized adsorption energy of OH⁻ for CCo@NiSe@NiBO. In addition, a CCo@NiSe@NiBO//active carbon hybrid device displayed an energy density of 35.58 Wh kg⁻¹ as well as 91.88 % of its initial capacitance after 10,000 cycles. It was successfully integrated into the circuit. This work emphasizes the advantages of electrospun nanofibers in constructing heterostructures and establishes heterostructured engineering as a powerful strategy for advancing energy storage devices and catalysis.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"257 ","pages":"Article 121760"},"PeriodicalIF":12.7,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148566188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 physics-based analytical framework for quantum transport and leakage in sub-10 nm carbon nanotube transistors","authors":"Shengchuan Hu,&nbsp;Jiaji Liang,&nbsp;Haochen Zhao,&nbsp;Nan Wei,&nbsp;Yingjun Yang,&nbsp;Lianmao Peng,&nbsp;Xiuli Fu","doi":"10.1016/j.carbon.2026.121747","DOIUrl":"10.1016/j.carbon.2026.121747","url":null,"abstract":"<div><div>As carbon nanotube field effect transistors (CNTFETs) are scaled into the sub-10 nm regime, device performance becomes increasingly constrained by the competition between electrostatic gate control and tunneling-induced leakage. Under such extreme scaling, the unique one-dimensional band structure of carbon nanotubes causes short-channel effects, phonon scattering, source-to-drain tunneling (SDT), band-to-band tunneling (BTBT), and ambipolar conduction to evolve and interact within the same bias-dependent energy landscape, and their interplay still lacks a clear physical interpretation. Here, we establish a physics-based analytical description that combines an explicit surface potential solution, quasi-two-dimensional electrostatic band modulation, and energy resolved transport analysis to capture the transport behavior of ultrascaled CNTFETs within a unified framework.</div><div>The analytical predictions show excellent agreement with experimental data and enable quantitative decomposition of multiple current components, thereby clarifying how the dominant leakage mechanism evolves with material properties, bias voltage, and device architecture, while explicitly capturing the competition between SDT and ambipolar conduction under different bias conditions. On this basis, we further investigate leakage-limited scaling strategies through bandgap engineering and electrostatic gate underlap (UL) design. Benchmarking against the International Roadmap for Devices and Systems (IRDS) indicates that optimized 5 nm gate-all-around CNTFETs can satisfy stringent leakage current constraints while maintaining strong on-state performance.</div><div>More broadly, this analytical description provides a physically transparent and computationally efficient theoretical foundation for clarifying leakage-limited scaling and guiding leakage-aware device optimization in carbon-based transistors.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"257 ","pages":"Article 121747"},"PeriodicalIF":12.7,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148567094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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-on-carbon reconstruction in biomass-derived Ni/CA driven by concurrent amorphous coking and filamentous growth","authors":"Jialin Zhang,&nbsp;Zihui Xiong,&nbsp;Zhaoyu Chen,&nbsp;Qiangqiang Ren,&nbsp;Limo He,&nbsp;Sheng Su,&nbsp;Yi Wang,&nbsp;Long Jiang,&nbsp;Jun Xu,&nbsp;Kai Xu,&nbsp;Song Hu,&nbsp;Jun Xiang","doi":"10.1016/j.carbon.2026.121770","DOIUrl":"10.1016/j.carbon.2026.121770","url":null,"abstract":"<div><div>Biomass-derived carbon aerogels are attractive carbon supports, yet their structural evolution under coking environments remains poorly understood. Utilizing a waste-pomelo-peel derived Ni/carbon aerogel (Ni/CA) as a model system, this work investigates the co-evolution of deposited carbon species and the resulting reconstruction of the carbon framework during ethanol cracking to elucidate dynamic structural transformations. Time-on-stream characterization combined with density functional theory (DFT) calculations revealed the coexistence of two distinct carbon growth patterns. After 6 h at 700 °C, the total carbon deposition rate reached 0.503 g· <span><math><mrow><msubsup><mi>g</mi><mrow><mi>c</mi><mi>a</mi><mi>t</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msubsup></mrow></math></span>· <span><math><mrow><msup><mi>h</mi><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span> with filamentous carbon (52.2%) ultimately exceeding amorphous carbon (47.8%). Initially, disordered amorphous carbon preferentially filled intrinsic micropores, whereas filamentous structures became increasingly dominant over time. Filamentous carbon grew via a Ni catalyzed tip growth mode, inducing pronounced framework reconstruction. DFT calculations suggested that representative carbon-containing states and C–C bonded configurations can be stabilized on Ni/carbon interfacial sites, providing energetic support for the experimentally observed persistence of deposited carbon. More importantly, filament entanglement generated secondary meso-/macroporous voids that partially compensated for the loss of intrinsic microporosity within the examined reaction window. These results demonstrate that carbon deposition on Ni/CA is not a purely deactivating process, but a dynamic carbon-on-carbon reconstruction involving competition between pore-blocking amorphous coking and filament-induced pore reorganization. The work provides a mechanistic understanding from a carbon materials perspective regarding deposited carbon evolution on biomass-derived carbon aerogels and clarifies how concurrent carbon growth pathways reshape pore hierarchy and interfacial accessibility within the examined reaction window under carbon-rich reaction conditions.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"257 ","pages":"Article 121770"},"PeriodicalIF":12.7,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148567108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}