Carbon最新文献 - Book学术

Preparation of continuous large-diameter mesophase pitch-based carbon fiber with good weavability and potential ultra-high thermal conductivity

IF 10.5 2区材料科学

Carbon Pub Date : 2025-03-01 DOI: 10.1016/j.carbon.2025.120181

Gaoming Ye , Huang Wu , Kui Shi , Dong Huang , Huafeng Quan , Chong Ye , Shipeng Zhu , Zhen Fan , Feng Qian , Jinshui Liu

{"title":"Preparation of continuous large-diameter mesophase pitch-based carbon fiber with good weavability and potential ultra-high thermal conductivity","authors":"Gaoming Ye , Huang Wu , Kui Shi , Dong Huang , Huafeng Quan , Chong Ye , Shipeng Zhu , Zhen Fan , Feng Qian , Jinshui Liu","doi":"10.1016/j.carbon.2025.120181","DOIUrl":"10.1016/j.carbon.2025.120181","url":null,"abstract":"<div><div>Large-diameter mesophase pitch-based graphite fibers exhibit superior thermal conductivity but suffer from weaker elongation at break, posing adverse challenges for their continuous production and weaving processability, and consequently hindering large-scale commercialization. To address this issue, this study employs a complete set of engineered production lines to spin 1K-bundle pitch fibers with a diameter of 30 μm, followed by continuous oxidation and 1600 °C heat treatment to prepare continuous large-diameter mesophase pitch-based carbon fibers. The fibers exhibit a tensile strength/modulus of 1.56 GPa/267 GPa, and an elongation at break of 0.58 %, demonstrating good yarn spreading and weaving processability. Ultimately, the process of 3000 °C graphitization indirectly actives their latent thermal conductivity, yielding a mesophase pitch-based graphite fibers with a thermal conductivity of up to 1294 W⋅m<sup>−1</sup>⋅K<sup>−1</sup>, which surpasses that of commercial carbon fiber K1100 by 17.7 %. This is because a smaller draw-down ratio leads to smaller shrinkage ratio and the flow rate gradient, causing a smaller flow direction change behavior of the MP liquid-crystal molecules, thereby maintaining high molecular orientation. The “two-step” process used in this study effectively resolves the contradiction between high thermal conductivity and poor weavability of large-diameter fibers, providing a feasible technical route for the development and commercialization of ultra-high thermal conductivity mesophase pitch-based carbon fibers.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"238 ","pages":"Article 120181"},"PeriodicalIF":10.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562383","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}

引用次数: 0

Recycling of graphite from spent lithium–ion batteries via low-temperature polyvinyl chloride roasting-assisted leaching

IF 10.5 2区材料科学

Carbon Pub Date : 2025-03-01 DOI: 10.1016/j.carbon.2025.120182

Guisheng Zeng , Rui Zhou , Chongwen Hu , Haohan Zhao , Hanxiao Gao , Jianwen Huang , Jiaping Yu , Feng Luo , Zhongbing Wang , Chunjian Deng , Junwei He , Chunli Liu

{"title":"Recycling of graphite from spent lithium–ion batteries via low-temperature polyvinyl chloride roasting-assisted leaching","authors":"Guisheng Zeng , Rui Zhou , Chongwen Hu , Haohan Zhao , Hanxiao Gao , Jianwen Huang , Jiaping Yu , Feng Luo , Zhongbing Wang , Chunjian Deng , Junwei He , Chunli Liu","doi":"10.1016/j.carbon.2025.120182","DOIUrl":"10.1016/j.carbon.2025.120182","url":null,"abstract":"<div><div>With the widespread application of lithium-ion batteries, the recycling of lithium batteries has attracted widespread attention. Unfortunately, the low economic value of spent graphite often leads to their neglect. This work proposes a novel scheme of efficient purification and high-quality regeneration of graphite from spent LIBs by low-temperature spent polyvinyl chloride (PVC) roasting-assisted leaching. Through low-temperature PVC roasting, the metal impurities of spent graphite were converted into water-soluble metal chloride, and the roasting tail gas was absorbed by water and converted into absorption liquor. After the leaching using the absorption liquor, the purity of the purified graphite exceeded 99.9%. Subsequently, the material was reheated at 1000°C to produce regenerated graphite. The material structure, including interlayer spacing and surface morphology, were significantly repaired, aligning with those of commercial graphite. The cyclic stability had been powerfully promoted, after 500 cycles at 1 C, the specific capacity of regenerated graphite remained at 111.5 mAh/g, with a retention rate of 75% (spent graphite was 43.4 mAh/g, 33%) and a coulombic efficiency exceeding 99%, demonstrating good rate performance and cycling stability. This technology not only reduces the regeneration costs of graphite materials but also achieves environmental benefits through the principle of “treating waste with waste”.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"238 ","pages":"Article 120182"},"PeriodicalIF":10.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551750","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}

引用次数: 0

Flexible rubber-based nanocomposite with superior electromagnetic interference shielding and joule heating

IF 10.5 2区材料科学

Carbon Pub Date : 2025-03-01 DOI: 10.1016/j.carbon.2025.120180

Ali Dehghani, Pradeep Sambyal, Mohammad Arjmand

{"title":"Flexible rubber-based nanocomposite with superior electromagnetic interference shielding and joule heating","authors":"Ali Dehghani, Pradeep Sambyal, Mohammad Arjmand","doi":"10.1016/j.carbon.2025.120180","DOIUrl":"10.1016/j.carbon.2025.120180","url":null,"abstract":"<div><div>Flexible multifunctional electromagnetic interference (EMI) shields that integrate effective electromagnetic wave (EMW) absorption, and efficient Joule heating are highly sought after for advanced electronic applications. In this study, we developed a robust, flexible, and multifunctional multi-layered gradient system using a two-step fabrication process, which includes compound solution mixing followed by hot press molding. The system consists of alternating magnetic layers (carbonized metal-organic framework (CMOF)/styrene butadiene rubber (SBR)) and conductive layers (carbon nanotube (CNT)/SBR). The resulting CNT-reinforced gradient nanocomposite exhibits impressive mechanical properties, with an elongation at break reaching up to 120 % and ultimate stress up to 13 MPa. Leveraging an absorption-reflection-reabsorption mechanism, the multi-layered gradient nanocomposite achieved an absorption rate of up to 57 % and an EMI shielding effectiveness (EMI SE) of 50 dB at a thickness of just 1 mm. Notably, the flexible structure maintains its performance after 500 cycles of bending and twisting, with only minimal reduction in EMI SE, retaining values of 47 dB and 46 dB, respectively. Furthermore, the composite demonstrates efficient electro-thermal conversion, achieving a steady-state temperature of 152 °C under a driving voltage of 10V. In short, this study presents an innovative approach to designing absorption-dominant, high-performance EMI shielding structures that combine mechanical robustness, and Joule heating capabilities, positioning it as a promising candidate for next-generation advanced electronic devices and energy conversion systems.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"238 ","pages":"Article 120180"},"PeriodicalIF":10.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551752","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}

引用次数: 0

Fabrication of silver-based metal-organic framework/graphene oxide composites hydrogels with anti-fouling and self-healing performance

IF 10.5 2区材料科学

Carbon Pub Date : 2025-02-28 DOI: 10.1016/j.carbon.2025.120177

Bin Liu , Peng Wang , Mingjun Zou , Yikun Ji , Lei Dong , Shujuan Liu , Qian Ye , Feng Zhou

{"title":"Fabrication of silver-based metal-organic framework/graphene oxide composites hydrogels with anti-fouling and self-healing performance","authors":"Bin Liu , Peng Wang , Mingjun Zou , Yikun Ji , Lei Dong , Shujuan Liu , Qian Ye , Feng Zhou","doi":"10.1016/j.carbon.2025.120177","DOIUrl":"10.1016/j.carbon.2025.120177","url":null,"abstract":"<div><div>Nanocomposite antifouling coatings have garnered significant attention in marine antifouling technology, primarily due to the integration of anti-fouling additives within antifouling coatings. In this study, silver-based metal azole framework (Ag-2MI) was successfully loaded onto graphene oxide (GO) surface via electrostatic interaction to obtain Ag-2MI/GO nanocomposites, which was used as a filler for hydrogels to obtain the nanocomposite hydrogels (Ag-2MI/GO/hydrogel). The resulting Ag-2MI/GO based hydrogels demonstrated improved mechanical properties and swelling resistance compared to the original hydrogels. Remarkably, the composite exhibited excellent photothermal conversion ability, enabling self-healing capability under near-infrared (NIR) irradiation. This self-healing capability helped to prevent mechanical degradation of the coatings. Furthermore, the Ag-2MI/GO/hydrogel coatings exhibit excellent inhibition of microbial adhesion through a combination of photothermal effect and the slow release of Ag<sup>+</sup> and 2MI, achieving over 91 % of bacteria elimination and a 98 % reduction in microalgae attachment.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"238 ","pages":"Article 120177"},"PeriodicalIF":10.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551753","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}

引用次数: 0

Materials property changes in ETU-10 graphite due to neutron irradiation at elevated temperatures

IF 10.5 2区材料科学

Carbon Pub Date : 2025-02-28 DOI: 10.1016/j.carbon.2025.120178

Anne A. Campbell , Aaron Selby , Nesrin Cetiner , Mary Snead , Jun Ohashi , Takashi Takagi , Yutai Katoh

{"title":"Materials property changes in ETU-10 graphite due to neutron irradiation at elevated temperatures","authors":"Anne A. Campbell , Aaron Selby , Nesrin Cetiner , Mary Snead , Jun Ohashi , Takashi Takagi , Yutai Katoh","doi":"10.1016/j.carbon.2025.120178","DOIUrl":"10.1016/j.carbon.2025.120178","url":null,"abstract":"<div><div>Graphite grade ETU-10, from IBIDEN Co., Ltd. Has been irradiated in the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory (ORNL). The irradiation program was developed to provide a preliminary study the irradiation-induced property changes to the dimensions/volume, elastic properties, strength, electrical resistivity, coefficient of thermal expansion, and thermal diffusivity/conductivity over a range of temperatures and neutron exposures that may be relevant for future nuclear reactors. The irradiation envelope covers a range of irradiation temperatures (300°C–900 °C) and fluences (up to 40 × 10<sup>25</sup> n/m<sup>2</sup> [E > 0.1 MeV] or ∼30 dpa) that would be relevant for advanced nuclear reactors. The dimensional change was observed to be anisotropic for an isotropic graphite, the specimen dimensions, volume, Young's modulus, shear modulus, and strength all displayed a parabolic fluence dependence, the electrical resistivity had a rapid rise followed by a decrease and a later increase, at high fluence the mean coefficient of thermal expansions was similar for all irradiation temperatures, and thermal conductivity rapidly decreased followed by a continued loss.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"238 ","pages":"Article 120178"},"PeriodicalIF":10.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562382","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}

引用次数: 0

Transformations of C60 fullerite in the regions of stability and instability of diamond on the carbon phase diagram in the pressure range of 20–160 GPa and temperatures of 300–2300 K

IF 10.5 2区材料科学

Carbon Pub Date : 2025-02-27 DOI: 10.1016/j.carbon.2025.120165

Danila Ovsyannikov , Fedor Khorobrykh , Kamil Bulatov , Boris Kulnitskiy , Vladlen Zhukov , Pavel Sorokin , Sergei Klimin , Mikhail Popov

{"title":"Transformations of C60 fullerite in the regions of stability and instability of diamond on the carbon phase diagram in the pressure range of 20–160 GPa and temperatures of 300–2300 K","authors":"Danila Ovsyannikov , Fedor Khorobrykh , Kamil Bulatov , Boris Kulnitskiy , Vladlen Zhukov , Pavel Sorokin , Sergei Klimin , Mikhail Popov","doi":"10.1016/j.carbon.2025.120165","DOIUrl":"10.1016/j.carbon.2025.120165","url":null,"abstract":"<div><div>The transformation features of C<sub>60</sub> fullerite have been studied in three regions of the recently updated carbon phase diagram at temperatures reaching 2300 K and pressures of 20–25 GPa (within the diamond stability region), 70 GPa (within the diamond instability region), and 160 GPa (also within the diamond stability region). The effect of resonant Raman scattering is observed in fullerite samples after treatment with a pressure of 20–25 GPa, depending on the synthesis temperature. When fullerite is heated under a pressure of 20–25 GPa, partial diamond formation is observed. An increase in pressure up to 160 GPa and heating to 2300 K does not result in the formation of diamond from fullerite, although at pressures above 115 GPa graphite is transformed into diamond. The observed effect can be explained by the fact that a denser structure than diamond is formed from fullerite at a pressure above 30 GPa. Therefore, the issue of the stability of the carbon phase at pressures exceeding 115 GPa remains a topic for further investigation.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"238 ","pages":"Article 120165"},"PeriodicalIF":10.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551754","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}

引用次数: 0

Enhanced electromagnetic wave absorption of multicore Fe4N@N-doped porous carbon core-shell microspheres through dielectric-magnetic coordination 通过介电磁性配位增强多核 Fe4N@N 掺杂多孔碳核壳微球的电磁波吸收能力

IF 10.5 2区材料科学

Carbon Pub Date : 2025-02-27 DOI: 10.1016/j.carbon.2025.120176

Shuting Zhang , Chengguo Wang , Xiangwei Meng , Siyu Liu , Xiaoyu Li , Zhiqiang Yao , Meijie Yu

{"title":"Enhanced electromagnetic wave absorption of multicore Fe4N@N-doped porous carbon core-shell microspheres through dielectric-magnetic coordination","authors":"Shuting Zhang , Chengguo Wang , Xiangwei Meng , Siyu Liu , Xiaoyu Li , Zhiqiang Yao , Meijie Yu","doi":"10.1016/j.carbon.2025.120176","DOIUrl":"10.1016/j.carbon.2025.120176","url":null,"abstract":"<div><div>With the vigorous development of nanotechnology, precise control of composition and structure in carbon-coated magnetic core-shell materials for efficient electromagnetic wave absorption is an attractive research direction. In this work, multi-core Fe<sub>4</sub>N@N-doped porous carbon core-shell microspheres (<em>p</em>-FCNS) were successfully synthesized using a controllable method to achieve excellent electromagnetic wave absorption performance at a thin matching thickness. <em>p</em>-FCNS offered multiple advantages due to the transformation of the Fe<sub>4</sub>N phase and porous carbon matrix: (I) excellent magnetic loss and charge conduction ability; (II) optimized impedance matching; and (III) enhanced interfacial polarization and other attenuation mechanisms. Through the synergistic effect of magnetic-dielectric loss, <em>p</em>-FCNS realized a minimum reflection loss of −57.61 dB (at 1.74 mm) and an optimal absorption bandwidth of 5.27 GHz (at 1.68 mm). Therefore, this work substantiated the significant potential of Fe<sub>4</sub>N@porous carbon composites for the application of electromagnetic wave absorption, and provided novel insights into the composition and structure control of high-performance electromagnetic wave absorption materials.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"237 ","pages":"Article 120176"},"PeriodicalIF":10.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529138","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}

引用次数: 0

Urchin -shaped NiO/Ni particles with a heterojunction deposited on porous carbon via electroplating and low-temperature heat treatment for efficient microwave absorption 通过电镀和低温热处理在多孔碳上沉积具有异质结的海胆状氧化镍/镍颗粒，实现高效微波吸收

IF 10.5 2区材料科学

Carbon Pub Date : 2025-02-27 DOI: 10.1016/j.carbon.2025.120157

Tong Shi , Xueting Li , Xianming Chen , Meng Rao , Yu Wang , Dongya Huang , Qinyuan Li , Hong Zeng , John Wang , Yuangming Chen

{"title":"Urchin -shaped NiO/Ni particles with a heterojunction deposited on porous carbon via electroplating and low-temperature heat treatment for efficient microwave absorption","authors":"Tong Shi , Xueting Li , Xianming Chen , Meng Rao , Yu Wang , Dongya Huang , Qinyuan Li , Hong Zeng , John Wang , Yuangming Chen","doi":"10.1016/j.carbon.2025.120157","DOIUrl":"10.1016/j.carbon.2025.120157","url":null,"abstract":"<div><div>The incorporation of magnetic metals into carbon-based materials provides an effective approach to address the impedance matching imbalance inherent in pure carbon-based wave-absorbing materials. However, the challenge was found in developing simple and efficient methods to fabricate carbon-based composites. Herein, Ni particles with an urchin-like morphology to effectively attenuate electromagnetic waves were loaded on porous carbon derived from canola straw (hereafter referred to as CCS) via electroplating. Thereafter, urchin-shaped NiO/Ni particles with heterojunctions on the CCS (NiO/Ni@CCS) were constructed by a brief low-temperature heat treatment. Experimental and simulation results indicated that the heterogeneous interface caused interface charge redistribution, thereby enhancing conductive and dielectric losses. NiO/Ni@CCS performed an excellent microwave absorbability with a minimum reflection loss of −52.09 dB and a wider efficient absorption bandwidth of 5.1 GHz. The radar cross-section (RCS) simulation further confirmed that NiO/Ni@CCS exhibited superior microwave attenuation capability with an RCS reduction of 29.16 dB m<sup>2</sup>. Moreover, NiO/Ni@CCS composite showed excellent corrosion resistance with a corrosion potential of −0.074 V for potential application in complex environments.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"237 ","pages":"Article 120157"},"PeriodicalIF":10.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534383","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}

引用次数: 0

Preparation and modulation of naphthalene oligomers catalyzed by chloroaluminate ionic liquids for advanced mesophase pitch production

IF 10.5 2区材料科学

Carbon Pub Date : 2025-02-27 DOI: 10.1016/j.carbon.2025.120163

Meng-meng Xu, Qi-guang Huang, Tian-li Hui, Tao Zheng, Hai-yan Liu, Rui Zhang, Xiang-hai Meng, Zhi-chang Liu

{"title":"Preparation and modulation of naphthalene oligomers catalyzed by chloroaluminate ionic liquids for advanced mesophase pitch production","authors":"Meng-meng Xu, Qi-guang Huang, Tian-li Hui, Tao Zheng, Hai-yan Liu, Rui Zhang, Xiang-hai Meng, Zhi-chang Liu","doi":"10.1016/j.carbon.2025.120163","DOIUrl":"10.1016/j.carbon.2025.120163","url":null,"abstract":"<div><div>Mesophase pitch is a crucial compound platform for the production of various advanced carbon materials, with its quality significantly influenced by the composition and structure of precursor materials. Here, we present a novel method for preparing naphthalene oligomers (NOs), which serve as precursors for the preparation of mesophase pitch (MP) via naphthalene polymerization catalyzed by chloroaluminate ionic liquids (Al-ILs). Different from those obtained via AlCl<sub>3</sub>-catalyzed method, the NOs synthesized by Al-ILs possess a narrow molecular weight distribution (MWD, 200–600 Da) and a well-defined molecular composition (di-, tri-, and tetra-polymers of naphthalene). When the prepared NOs were used as precursors, the resulting MP exhibited a shorter polycondensation time (4 h), higher yield (68%), lower ash content (0.005%), more concentrated MWD, and easier carbonization. These improvements are attributed to the tunable structure and acidity of Al-ILs, which facilitate naphthalene polymerization at low reaction temperatures and appropriate acidity, thereby improving its controllability. This work provides a flexible and efficient pathway for the custom production of NOs that potentially enable broader industrial applications of MP.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"238 ","pages":"Article 120163"},"PeriodicalIF":10.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551755","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}

引用次数: 0

Flat-band driven ordered magnetism in sp3 supermodulated defected fluorinated graphene

IF 10.5 2区材料科学

Carbon Pub Date : 2025-02-27 DOI: 10.1016/j.carbon.2025.120131

Wei-Jian Li , Shui-Lin Li , Gan Liu , Xiao-Xiang Xi , Jia-Wei Liu , Da-Fei Sun , Yuan Zhou , Nu-Jiang Tang

{"title":"Flat-band driven ordered magnetism in sp3 supermodulated defected fluorinated graphene","authors":"Wei-Jian Li , Shui-Lin Li , Gan Liu , Xiao-Xiang Xi , Jia-Wei Liu , Da-Fei Sun , Yuan Zhou , Nu-Jiang Tang","doi":"10.1016/j.carbon.2025.120131","DOIUrl":"10.1016/j.carbon.2025.120131","url":null,"abstract":"<div><div>Strong correlation drives a variety of exotic quantum phases, and thus has been a vital topic in modern condensed matter physics. One of the recent advances is the strong correlations in flat-band systems. Here, by introducing the supermodulations of <em>sp</em><span><math><msup><mrow></mrow><mrow><mn>3</mn></mrow></msup></math></span> fluorinated islands around divacancy, a new strategy to enhance the correlations of the <span><math><mi>π</mi></math></span> electrons in defected graphene, beyond the moiré patterns, is proposed. <em>Ab-initio</em> calculations reveal that the systems host nearly flat band, and the flatness of the band near the Fermi level is substantially strengthened, being comparable to that in small angle twisted bilayer graphene. Interestingly, the topography of the effective model can be tuned by properly removing the fluorine atoms in the island. Consequently, the long-range ordered magnetic ground states appear in the designed structures as theoretically predicted and experimentally observed, confirming the validity of this new supermodulation. We show that the origin of magnetism is from the fluorine decorated to the defected graphene, and the periodic network among the <span><math><mi>π</mi></math></span> electrons of carbon is responsible for the magnetic long range ordering in the fluorinated reduced graphene. This work provides a feasible and simple platform to study the interaction induced phenomena in defected graphene. Moreover, the much reduced supercell size, in comparison with the moiré materials, may support higher Curie temperature, opening an avenue for future high-temperature spintronics applications in graphene-based materials.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"237 ","pages":"Article 120131"},"PeriodicalIF":10.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526823","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}

引用次数: 0