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Interface-engineered 3D/2D sandwich-like Sb2WO6@Ti3C2Tx MXene schottky junction catalyst with selective CO2reduction efficiency 认领 引用
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作者 Jie Li Yi Li +4 位作者 Dawei Wang Pengli Chen Saraschandra Naraginti Haisuo Wu Daniel S.Alessi 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第7期735-747,I0017,共13页
Efficient solar-driven photocatalytic CO2reduction requires accurate regulation of interfacial charge transfer and reaction selectivity.Insufficient adsorption of*COOH intermediate at catalytic sites leads to high ... Efficient solar-driven photocatalytic CO2reduction requires accurate regulation of interfacial charge transfer and reaction selectivity.Insufficient adsorption of*COOH intermediate at catalytic sites leads to high energy barriers in CO2reduction reactions,highlighting the importance of enhancing (*)^COOH adsorption to promote CO2conversion.In this study,a sandwich-structured interfacial Schottky junction of Sb2WO6@Ti3C2Tx was constructed via an in situ self-assembly hydrothermal process to achieve efficient and selective photocatalytic CO2reduction.The effect of the size of nest-shaped Sb2WO6 particles on triggering (*)^COOH adsorption configuration transition and improving CH4 selectivity during sandwich structure formation was systematically elucidated.Due to the difference in work functions between Sb2WO6 and Ti3C2Tx,localized electrophilic and nucleophilic regions are formed at the interface,and the resulting Schottky junction effectively suppresses the electron-hole recombination and enhances charge separation.Optimized Sb2WO6 particles induce strong orbital interactions with Ti3C2Tx layers and*COOH intermediates,while the Schottky junction promotes electron transfer from Sb2WO6@Ti3C2Tx to (*)^COOH,significantly strengthening (*)^COOH adsorption and reducing the thermodynamic barrier of CO2reduction.Benefiting from the synergistic effects of the sandwich-structured Schottky junction and the localized surface plasmon resonance of Ti3C2Tx,the optimized catalyst(SWT-2:1)achieved a CH4 yield of 29.47μmol g-1 h-1 with a selectivity of up to 91.96%under visiblelight irradiation.Density functional theory calculations further confirmed that the enhanced interfacial electron transfer facilitates CO2protonation and selective reduction to CH4 formation.This work provides insights into designing Aurivillius-type semiconductor/MXene hybrid Schottky junctions for efficient visible-light-driven CO2reduction. 展开更多
关键词 CO2photoreduction MXene High-selectivity CH4 Schottky junction Sb2WO6
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Construction of effective and recyclable non-noble metal coordination polymers and their multiple applications in water 认领 引用
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作者 Jiahao Li Bin Pan +2 位作者 Anruo Mao Likui Wang Dawei Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第1期266-275,共10页
Acceptorless dehydrogenative coupling of pyridinemethanol with ketones is one of the most reliable methodologies to access functionalized 1,8-naphthyridine derivatives.However,it is challenging to develop environmenta... Acceptorless dehydrogenative coupling of pyridinemethanol with ketones is one of the most reliable methodologies to access functionalized 1,8-naphthyridine derivatives.However,it is challenging to develop environmentally friendly catalytic systems,especially in constructing efficient and recyclable catalysts under water or solvent-free conditions.Here,we designed two novel coordination polymers Cd-CPs and Fe-CPs to investigate their catalytic performance in water.Gratifyingly,it was observed that Cd-CPs as a multifunctional catalyst was successfully applied to establish a universal pathway for direct fabrication of 1,8-naphthyridine derivatives under water conditions,while it was effective for the synthesis of1,3,5-triazines through acceptorless dehydrogenative coupling strategies.The features of broad substrate,high atom efficiency,and good catalyst reusability highlight the feasibility of this transformation.In additional,we demonstrated the spindle-like structures Fe-P,derived from the Fe-CPs via phosphorylation,which can be used as an efficient electrocatalyst for oxygen evolution reaction with good stability.This work provides two highly efficient non-noble metal catalysts for functionalized 1,8-naphthyridine derivatives production and oxygen evolution reaction,and opens a new avenue to further fabricate diverse metal catalysts with high catalytic performance in water. 展开更多
关键词 Acceptorless dehydrogenative coupling 1,8-Naphthyridine derivatives Coordination polymers Non-noble metal catalyst
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Spatial-temporal correlation between surface distress and internal damage in pavement structure 认领 引用
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作者 Yuhui Zhang Peiguo Yuan +5 位作者 Zhongping Wang Zepeng Fan Haotian Lyu Fujiao Tang Binglei Xie Dawei Wang 《Journal of Road Engineering》 EI CAS 2026年第2期232-244,共13页
A recurrent phenomenon is the reappearance of distress conditions on the same road section,both before and after maintenance interventions.The maintenance work essentially addresses the superficial symptoms rather tha... A recurrent phenomenon is the reappearance of distress conditions on the same road section,both before and after maintenance interventions.The maintenance work essentially addresses the superficial symptoms rather than the root causes,since the internal relationships between various forms of distress remain unclear.This study quantitatively evaluates the correlation between surface distress and internal defects based on field detection data and statistical methods,effectively complementing existing qualitative analytical method.Approximately 200 defect locations data were collected from the RIOHTrack full-scale ring road,and targeted evaluation metrics reflecting pavement performance were proposed.Then,the Ripley's K-function was employed to analyze the spatial aggregation of surface and internal cracks,and to further verify their macroscopic correlation during the spatio-temporal evolution process.Next,kernel density estimation and relative risk assessment were used to investigate the relationships between the surface distress and internal defects.Experimental results reveal that the loading position significantly affects surface distress,but exhibits no obvious correlation with hidden damage,and there is also no spatial aggregation phenomenon between them.However,for semi-rigid base asphalt pavement,internal cracks and surface cracks show a strong correlation,while demonstrating only a weak association with loading position.Finally,a sensitivity analysis was performed based on the results obtained at different distance thresholds,and r=0.5 m was designated as the optimal spatial correlation distance threshold.This threshold was then used to determine the pavement structure offering the best crack resistance performance,providing a key reference for the design and maintenance of heavy-duty highway pavements.This study provides a reference for road active maintenance and supports the transformation of maintenance strategies from passive response to active intervention. 展开更多
关键词 Pavement structure RIOHTrack Ripley's K-function Kernel density estimation Surface distress Internal defects
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A design strategy of ratiometric optical probe for Fe3+ions and ascorbic acid detection based on europium-doped carbon dots 认领 引用
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作者 Min Li Mingyang Han +7 位作者 Xinying Song Yiming Chen Zepeng Wu Li Guan Fenghe Wang Dawei Wang Longfeng Lv Xu Li 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第5期1415-1424,共10页
Rare-earth doped carbon dots represent a new generation of nanomaterials,which achieve the functional modulation and property optimization of carbon dots materials.In this paper,Eu3+-doped carbon dots(Eu-CDs)were p... Rare-earth doped carbon dots represent a new generation of nanomaterials,which achieve the functional modulation and property optimization of carbon dots materials.In this paper,Eu3+-doped carbon dots(Eu-CDs)were prepared employing a one-step hydrothermal approach.The structure and properties of Eu-CDs were characterized using a transmission electron microscope(TEM),X-ray photoelectron spectroscopy(XPS),X-ray diffraction(XRD),Fourier transform infrared(FTIR)spectroscopy,etc.Eu-CDs exhibit a series of distinct emission peaks at 467,595,620 and 702 nm when excited at 395 nm,respectively.An“off-on”strategy for detecting of Fe3+and ascorbic acid was established on the basis of changes in luminescence peak intensity ratios of the CDs and Eu3+,which effectively reduces the detection limit compared with single-peak detection.The I467/I595 of Eu-CDs exhibits an excellent linear association with the concentrations of Fe3+or ascorbic acid,and the limit of detections are 0.15 and 0.13μmol/L,respectively,indicating that Eu-CDs can be applied for the quantitative measurement of Fe3+and ascorbic acid,and are successfully applied in real samples. 展开更多
关键词 Eu-CDs Luminescence peak intensity ratio Detection limit Fe3+ions Ascorbic acid Rare earths
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Microencapsulation and characterization of controlled-release intestinal drugs:a critical review 认领 引用
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作者 Weiguang SU Dawei WANG +3 位作者 Siegfried YEBOAH Jinshen WANG Chonghai XU Li WANG 《Journal of Zhejiang University-SCIENCE B》 SCIE CAS CSCD 2026年第4期321-342,共22页
Oral administration is associated with high patient adherence,as it is not only the route for primary site absorption of nutrients and peptide drugs but also is important for treating intestinal diseases.However,tradi... Oral administration is associated with high patient adherence,as it is not only the route for primary site absorption of nutrients and peptide drugs but also is important for treating intestinal diseases.However,traditional oral intestinal drugs are limited by drug degradation and inactivation,particularly for proteins and peptides,due to gastric acid and digestive enzymes,making it difficult to effectively deliver drugs to target sites.To address these challenges,controlled-release microencapsulated intestinal drugs(MeIDs)have been developed and have attracted attention for their ability to protect drugs from degradation by gastric acid and digestive enzymes.In this study,we systematically reviewed research articles on the preparation methods,release mechanisms,and evaluation strategies of MeIDs using Google Scholar,Web of Science,and Science Direct databases.Our findings show that the preparation of emulsions,microencapsulation methods,shell material selection,and drug properties need to be considered comprehensively for MeID development.In addition,we found that coating,microanocarriers,and absorption enhancers can be combined to enhance microcapsule performance.Beyond focusing on drug loading efficiency and microcapsule morphology,we also found that cell models,animal models,and spectroscopic analysis techniques can be used to evaluate drug biocompatibility,stability,and efficacy.Finally,the literature has shown that optimizing the preparation process can regulate drug release kinetics.For future research,we suggest that studies should focus on low-cost methods for producing monodisperse microcapsules,developing dynamic responsive shell materials,and using organ-on-a-chip technology for precise evaluation,as part of the theoretical support towards the development of microencapsulated drugs and targeted drug delivery. 展开更多
关键词 Oral drug Controlled release Microencapsulated intestinal drug Microencapsulation method Response mechanism
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Seismic hazards analysis for the Qiongdongnan segment of the Continental Slope Fault Zone in northern South China Sea from dynamic rupture models:Implications for earthquake-induced landslides and tsunamis 认领 引用
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作者 Chen Xu Zhenguo Zhang +2 位作者 Danhua Xin Fanchang Zeng Dawei Wang 《Earthquake Science》 CAS CSCD 2026年第4期355-369,共15页
Marine earthquakes are extremely dangerous.The Qiongdongnan(QDN)segment of the Continental Slope Fault Zone(CSFZ)in the northern South China Sea poses seismic risks that may trigger submarine landslides and tsunamis.H... Marine earthquakes are extremely dangerous.The Qiongdongnan(QDN)segment of the Continental Slope Fault Zone(CSFZ)in the northern South China Sea poses seismic risks that may trigger submarine landslides and tsunamis.Here,using the curvedgrid finite-difference method(CGFDM),we established a dynamic spontaneous rupture model for this region southeast of Hainan Island,China.We simulated the wave propagation and strong ground motion resulting from these earthquakes and produced seismic intensity distribution maps.The maximum magnitude achieved across all models was MW7.7.A left-lateral strike-slip fault with a dip angle of 59.5°was used in the simulations,and 26 hypocenters at various positions and depths were selected.We further investigated the seismic waves and strong ground motions generated by these events.The results indicated that the velocity structure had a significant influence on the maximum slip concentration on the fault.Additionally,under the considered initial stress conditions,the earthquake magnitudes varied with depth for certain hypocenters.We analyzed the potential risk of earthquake-induced landslides using the pseudostatic method and introduced the factor of safety(FOS).The results showed that the northern landslide area contained a large section where the FOS was less than one,indicating the increased likelihood of landslides.In addition,for hypocenters at a depth of 8 km,earthquake with the smallest magnitude can generate a significantly stronger event than one with hypocenters at depths of 10 and 12 km.Overall,this fault poses significant risk for a chain of earthquake-landslide-tsunami disasters.Our study can provide a reliable reference for the development of disaster warning systems in the region and further our understanding of seismicity along the QDN segment. 展开更多
关键词 dynamic rupture seismic intensity seismic motion simulation landslip risk
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量子传感驱动的化学与生物测量 认领 引用
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作者 冯建东 周爱梅 +2 位作者 王大伟 王勇 李景虹 《中国科学基金》 CSSCI CSCD 北大核心 2026年第2期325-334,共10页
量子传感正驱动着化学和生物测量进入全新的时代。本文系统性地介绍了量子化学测量的基本逻辑和典型体系。量子化学测量以量子体系(如电子、光子、原子、分子)产生的量子叠加、量子纠缠等量子态作为探针,通过光学或者微波手段对量子探... 量子传感正驱动着化学和生物测量进入全新的时代。本文系统性地介绍了量子化学测量的基本逻辑和典型体系。量子化学测量以量子体系(如电子、光子、原子、分子)产生的量子叠加、量子纠缠等量子态作为探针,通过光学或者微波手段对量子探针进行初始化、操控与读出,将化学与生物系统所产生的物理场变化(如磁、电、热)转换为可解析的量子信号,从而实现对化学系统中组分、结构、动力学及相互作用等信息的原位、实时、高精度测量与成像。该交叉方向深度融合了量子物理、分析化学与生物物理,标志着化学测量学从“经典观测”到“量子感知”的范式变革。 展开更多
关键词 量子探针 量子传感 量子增强测量 化学测量 生物成像
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A review of superplastic magnesium alloys:Focusing on alloying strategy,grain structure control and deformation mechanisms 认领 引用 被引量：5
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作者 Siqing Wang Min Zha +5 位作者 Hailong Jia Yajie Yang Dawei Wang Cheng Wang Yipeng Gao Hui-Yuan Wang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第8期303-319,共17页
In response to the urgent demand for lightweight,magnesium(Mg)alloys have garnered considerable attention owing to their low density.Nonetheless,the intrinsic poor room-temperature formability of Mg alloys remains a m... In response to the urgent demand for lightweight,magnesium(Mg)alloys have garnered considerable attention owing to their low density.Nonetheless,the intrinsic poor room-temperature formability of Mg alloys remains a major obstacle in shaping precise complex components,necessitating the development of superplastic Mg alloys.Excellent superplasticity is usually acquired in high-alloyed Mg alloys with enhanced microstructural thermal stability facilitated by abundant optimized second-phase particles.While for cost-effective low-alloyed Mg alloys lacking particles,regulating solute segregation has emerged as a promising approach to achieve superplasticity recently.Moreover,the potential of bimodal-grained Mg alloys for superplastic deformation has been revealed,expanding the options for designing superplastic materials beyond the conventional approach of fine-grained microstructures.This study reviews significant developments in superplastic Mg alloys from the view of alloying strategies,grain structure control and deformation mechanisms,with potential implications for future research and industrial applications of superplastic Mg alloys. 展开更多
关键词 Mg alloys Superplasticity Second-phase particles Solute segregation Microstructure control
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Application of aluminum industry solid waste in asphalt mixtures and its impact on performance:Current research and future perspectives 认领 引用 被引量：4
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作者 Tianyi Yan Yongjun Meng +3 位作者 Xiaowan Luo Jinbin Chen Keyu Yan Dawei Wang 《Journal of Road Engineering》 EI CAS 2025年第4期554-571,共18页
Aluminum industrial solid waste represents a highly abundant yet underutilized resource.Its incorporation into asphalt pavement applications can effectively reduce the exploitation of natural resources and mitigate en... Aluminum industrial solid waste represents a highly abundant yet underutilized resource.Its incorporation into asphalt pavement applications can effectively reduce the exploitation of natural resources and mitigate environmental issues caused by waste accumulation.This paper focuses on typical solid waste resources generated by the aluminum industry,summarizing the latest research progress in their application within the asphalt pavement industry and proposing key directions for future attention.The physicochemical properties of red mud(RM),spent aluminum electrolytic cathode materials,and secondary aluminum dross(SAD)are reviewed.The effects and mechanisms of RM,spent aluminum electrolytic cathode materials,and SAD on the performance of asphalt and its mixtures are elaborated.RM significantly enhances the aging resistance of asphalt,the hightemperature rheological properties of asphalt mastic,and the rutting resistance of asphalt mixtures.Spent aluminum electrolytic cathode materials require the removal of fluorides and cyanides before further application in asphalt pavement.SAD effectively improves the dynamic stability of asphalt mixtures.This review presents the first systematic summary of key scientific challenges and technical bottlenecks in the application of aluminum industrial solid waste in asphalt pavements.It clarifies that future research should prioritize waste pretreatment technologies,performance regulation mechanisms,and life cycle environmental impact assessments.These contributions provide essential theoretical foundations and technical guidance for advancing the resource utilization of aluminum industrial solid waste,holding substantial significance for promoting the development of green transportation infrastructure. 展开更多
关键词 Aluminum industry solid waste Asphalt mastic Asphalt mixtures Red mud Spent aluminum electrolytic cathode materials Secondary aluminum dross
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Nonlinear rheological behavior of asphalt based on large amplitude oscillation shear test under different loading,aging,and modification conditions 认领 引用 被引量：4
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作者 Jiaqiu Xu Zijia Wang +3 位作者 Zepeng Fan Junfu Liu Guoyang Lu Dawei Wang 《Journal of Road Engineering》 EI CAS 2025年第1期48-64,共17页
To reveal the effects of environmental and loading conditions, as well as asphalt properties on the nonlinear rheological behavior of asphalt, the large amplitude oscillation shear(LAOS) test was introduced, and the F... To reveal the effects of environmental and loading conditions, as well as asphalt properties on the nonlinear rheological behavior of asphalt, the large amplitude oscillation shear(LAOS) test was introduced, and the Fourier transform rheology, Lissajous curve method, and the LAOS fatigue test have been applied to investigate the nonlinear rheological behavior of asphalt binders. The research results indicate that a decrease in temperature, an increase in shear frequency and strain level, the introduction of polymer modifiers, and the aging effect of asphalt can significantly increase the nonlinearity of asphalt, manifested by the higher relative magnitude of the third harmonic and zero-strain nonlinear coefficient. For the two polymer modifiers selected in this study, the 4%polyurethane modifier exhibits a higher nonlinear lifting effect than the 4% styrene-butadiene-styrene(SBS). The impact of long-term aging on nonlinear viscoelasticity is observably greater than that of short-term aging. The zero-strain nonlinear coefficient estimated based on the average value method can accurately characterize the nonlinear viscoelasticity of asphalt, which can serve as an effective supplement to the relative magnitude of the third harmonic. All asphalts exhibit shear thinning behavior under the test temperature of 24℃, and the decrease in test temperature, the increase in shear rate and strain level, the introduction of modifiers, and the aging effect of asphalt all exacerbate the shear thinning behavior of asphalt. In addition, the fatigue failure process of asphalt materials is accompanied by an increasing degree of nonlinearity. 展开更多
关键词 Nonlinear viscoelasticity Polymer modified asphalt Large amplitude shear oscillation Rheological behavior Shear thinning
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Adjustable corrosion and mechanical properties of Mg-Zn-Ca-Ni alloys for fracturing materials 认领 引用 被引量：3
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作者 Dawei Wang Xiangshuang Jiang +7 位作者 Changxin Chen Xun Zhang Zhong-Zheng Jin Fuyong Cao Jia-Ning Zhu Cheng Wang Yinlong Ma Min Zha 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第6期2618-2635,共18页
Two sets of alloys,Mg-Zn-Ca-xNi(0≤x≤5),have been developed with tunable corrosion and mechanical properties,optimized for fracturing materials.High-zinc artificial aged(T6)Mg-12Zn-0.5Ca-x Ni(0≤x≤5)series,featuring... Two sets of alloys,Mg-Zn-Ca-xNi(0≤x≤5),have been developed with tunable corrosion and mechanical properties,optimized for fracturing materials.High-zinc artificial aged(T6)Mg-12Zn-0.5Ca-x Ni(0≤x≤5)series,featuring a straightforward preparation method and the potential for manufacturing large-scale components,exhibit notable corrosion rates up to 29 mg cm-2h-1at 25℃ and 643 mg cm-2h-1at 93℃.The high corrosion rate is primary due to the Ni–containing second phases,which intensify the galvanic corrosion that overwhelms their corrosion barrier effect.Low-zinc rolled Mg-1.5Zn-0.2Ca-x Ni(0≤x≤5)series,characterizing excellent deformability with an elongation to failure of~26%,present accelerated corrosion rates up to 34 mg cm-2h-1at 25℃ and 942 mg cm-2h-1at 93℃.The elimination of corrosion barrier effect via deformation contributes to the further increase of corrosion rate compared to the T6 series.Additionally,Mg-Zn-Ca-xNi(0≤x≤5)alloys exhibit tunable ultimate tensile strengths ranging from~190 to~237 MPa,depending on their specific composition.The adjustable corrosion rate and mechanical properties render the Mg-Zn-Ca-x Ni(0≤x≤5)alloys suitable for fracturing materials. 展开更多
关键词 Mg-Zn-Ca alloy Fracturing material Galvanic corrosion Corrosion barrier
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Electrically Tunable Graphene Terahertz Isolator Assisted by Nonreciprocal Plasmon 认领 引用 被引量：1
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作者 Chen-Ran Xu Weiru Fan +1 位作者 Yanhao Tang Dawei Wang 《Chinese Physics Letters》 SCIE EI CAS CSCD 2025年第1期58-67,共10页
Nonreciprocal isolators enable unidirectional light propagation without back-reflection.Typical terahertz isolators require magnetic fields to break the time-reversal symmetry.Herein,we propose a nonmagnetic isolator ... Nonreciprocal isolators enable unidirectional light propagation without back-reflection.Typical terahertz isolators require magnetic fields to break the time-reversal symmetry.Herein,we propose a nonmagnetic isolator in the terahertz range based on nonreciprocal graphene plasmons operated in a reflection configuration.The bias voltage generates a drift current in graphene,which breaks the time-reversal symmetry and induces nonreciprocal reflection.The isolator device exhibited a high isolation exceeding 20 d B with an insertion loss of less than 3 d B.Moreover,the bandwidth wit isolation exceeding 20 d B can be broadened five times to 1.7 THz by tuning the carrier density.The indexes,including the isolation,insertion loss and bandwidth of the isolator,show a strong dependence on the drift velocity and mobility of graphene,as well as the air-gap thickness.Our study shows great potential in the burgeoning terahertz technology,where nonmagnetic and electrically tunable isolators are still lacking. 展开更多
关键词 tuning reciprocal exceeding
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Secure transmission of IRS-UAV buffer-aided relaying system with delay constraint 认领 引用
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作者 Dawei WANG Linfeng YUAN +2 位作者 Hongbo ZHAO Lingtong MIN Yixin HE 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2025年第3期447-461,共15页
This paper investigates the secure communication between legitimate users in the presence of eavesdroppers, where the Intelligent Reflective Surface-Unmanned Aerial Vehicle (IRS-UAV) and Buffer-Aided (BA) relaying tec... This paper investigates the secure communication between legitimate users in the presence of eavesdroppers, where the Intelligent Reflective Surface-Unmanned Aerial Vehicle (IRS-UAV) and Buffer-Aided (BA) relaying techniques are utilized to enhance secrecy performance. By jointly optimizing the link selection strategy, the UAV position, and the reflection coefficient of the IRS, we aim to maximize the long-term average secrecy rate. Specifically, we propose a novel buffer in/out stabilization scheme based on the Lyapunov framework, which transforms the long-term average secrecy rate maximization problem into two per-slot drift-plus-penalty minimization problems with different link selection factors. The hybrid Particle Swarm Optimization-Artificial Fish Swarm Algorithm (PSO-AFSA) is adopted to optimize the UAV position, and the IRS reflection coefficient optimization problem is solved by iterative optimization in which auxiliary variables and standard convex optimization algorithms are introduced. Finally, the delay constraint is set to ensure the timeliness of information packets. Simulation results demonstrate that our proposed scheme outperforms the comparison schemes in terms of average secrecy rate. Specifically, the addition of BA improves the average secrecy rate by 1.37 bps/Hz, and the continued optimizations of IRS reflection coefficients and UAV positions improve the average secrecy rate by 2.46 bps/Hz and 3.75 bps/Hz, respectively. 展开更多
关键词 Buffer-aided relaying technique Intelligent reflective surface Unmanned aerial vehicle Delay constraint Average secrecy rate
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Valley-selective manipulation of moiréexcitons through optical Stark effect 认领 引用
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作者 Chenran Xu Jichen Zhou +5 位作者 Zhexu Shan Wenjian Su Kenji Watanabe Takashi Taniguchi Dawei Wang Yanhao Tang 《Chinese Physics B》 SCIE EI CAS CSCD 2025年第1期14-18,共5页
Semiconductor moirésuperlattices provide great platforms for exploring exotic collective excitations.Optical Stark effect,a shift of the electronic transition in the presence of a light field,provides an ultrafas... Semiconductor moirésuperlattices provide great platforms for exploring exotic collective excitations.Optical Stark effect,a shift of the electronic transition in the presence of a light field,provides an ultrafast and coherent method of manipulating matter states,which,however,has not been demonstrated in moirématerials.Here,we report the valleyselective optical Stark effect of moiréexcitons in the WSe2/WS2superlattice by using transient reflection spectroscopy.Prominent valley-selective energy shifts up to 7.8 meV have been observed for moiréexcitons,corresponding to pseudomagnetic fields as large as 34 T.Our results provide a route to coherently manipulate exotic states in moirésuperlattices. 展开更多
关键词 optical Stark effect moir´e exciton transient reflection spectroscopy
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Sustainable compression-molded bamboo fibers/poly(lactic acid)green composites with excellent UV shielding performance 认领 引用 被引量：2
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作者 Binqi Fei Haiyan Yang +8 位作者 Jing Yang Dawei Wang Hua Guo Hua Hou Saad Melhi Ben Bin Xu Hamdy Khamees Thabet Zhanhu Guo Zhengjun Shi 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第2期247-257,共11页
The increasing deployment of electronics in everyday life has generated great concerns regarding the effective disposal of waste from these components.Here,we focused on a facile sustainable and economical strategy to... The increasing deployment of electronics in everyday life has generated great concerns regarding the effective disposal of waste from these components.Here,we focused on a facile sustainable and economical strategy to provide ideas for this issue.This strategy relied on using appropriate mechanical treatment and sodium lignosulfonate coating to improve the dispersion and interfacial compatibility of bamboo fibers in poly(lactic acid).By optimising the particle size and concentration of sodium lignosulphonate,high value-added and green composites were prepared using sectional pressurization with a venting procedure.The treated composite displayed an ultra-smooth surface(roughness of 0.592 nm),impressive transient properties(disintegration and degradation behaviour after 30 d),and outstanding ultraviolet(UV)shielding properties(100%).These properties hold the promise of being an excellent substrate for electronic devices,especially for high-precision processing,transient electronics,and UV damage prevention.The satisfactory interfacial compatibility of the composites was confirmed by detailed characterisation regarding the related physicochemical properties.This investigation offers a sustainable approach for producing high value-added green composites from biomass and biomass-derived materials. 展开更多
关键词 Bamboo fibers Poly(lactic acid) Interfacial compatibility Sodium lignosulfonate
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Enhancing corrosion resistance of Mg-Al-Mn-Ca-Y dilute alloy via novel core-shell structured Al8Mn4Y-Al2Ca and controllable solute segregation 认领 引用 被引量：1
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作者 Xiaorui Dong Min Zha +3 位作者 Dawei Wang Siqing Wang Yajie Yang Hailong Jia 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第1期172-192,共21页
A novel core-shell structured Al8Mn4Y-Al2Ca phase and controllable solute-segregation are elaborately designed in dilute Mg-0.6Al-0.5Mn-0.1Ca-0.1Y alloy(wt.%),via incomplete peritectic transformation during t... A novel core-shell structured Al8Mn4Y-Al2Ca phase and controllable solute-segregation are elaborately designed in dilute Mg-0.6Al-0.5Mn-0.1Ca-0.1Y alloy(wt.%),via incomplete peritectic transformation during twin-roll casting.When soaked in 3.5 wt.%NaCl solution,Al2Ca shell with a low electrochemical potential prevents direct contact of noble Al8Mn4Y with Mg matrix,mitigating the micro-galvanic corrosion and meanwhile accelerating the formation of uniform corrosion film.Thereafter,solute(Al,Ca)-segregation motivates the formation of heterogeneous multilayered corrosion product films,enhancing corrosion resistance and even achieving self-healing upon long-term corrosion.Notably,the dilute Mg alloy exhibits a corrosion rate as low as 0.22±0.05 mm·y−1. 展开更多
关键词 Mg-Al-Mn-based alloys Core-shell structure Solute segregation Corrosion behavior Protective film
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A Comparative Analysis of Subtyping Methodologies on Cross-sectional sMRI Data 认领 引用
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作者 Shirui Zhang Baitong Zhang +14 位作者 Kun Zhao Zhuangzhuang Li Pan Wang Dawei Wang Chengyuan Song Jie Lu Zengqiang Zhang Hongxiang Yao Tong Han Chunshui Yu Bo Zhou Ying Han Xi Zhang Pindong Chen Yong Liu 《Neuroscience Bulletin》 SCIE CAS CSCD 2025年第9期1689-1695,共7页
Dear Editor,Growing clinical evidence shows that brain disorders are heterogeneous in phenotype,genetics,and neuropathology[1].Diagnosis and treatment tend to be affected by symptom presentation and the heterogeneity ... Dear Editor,Growing clinical evidence shows that brain disorders are heterogeneous in phenotype,genetics,and neuropathology[1].Diagnosis and treatment tend to be affected by symptom presentation and the heterogeneity of pathology,potentially hindering clinical trials in the development of medical treatment.Brain-based subtyping studies utilize magnetic resonance imaging(MRI)and data-driven methods to discover the subtypes of diseases,providing a new perspective on disease heterogeneity. 展开更多
关键词 magnetic resonance imaging brain disorders magnetic resonance imaging mri clinical trials subtyping methodologies disease heterogeneity cross sectional data
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Improved hydrogen and oxygen evolution rates in Pt@TiO2@RuO2hollow nanoshells through dielectric Mie resonance and spatial cocatalyst separation 认领 引用
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作者 Xiaxi Yao Xiuli Hu +3 位作者 Fangcheng Huang Xuhong Wang Xuekun Hong Dawei Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第5期595-599,共5页
Photocatalytic overall water splitting is a promising method for producing clean hydrogen energy,but faces challenges such as low light utilization efficiency and high charge carrier recombination rates.This study dem... Photocatalytic overall water splitting is a promising method for producing clean hydrogen energy,but faces challenges such as low light utilization efficiency and high charge carrier recombination rates.This study demonstrates that dielectric Mie resonance in TiO2hollow nanoshells can enhance electric field intensity and increase light absorption through resonant energy transfer,compared to crushed TiO2nanoparticles.The Mie resonance effect was confirmed through fluorescence spectra,photo-response current measurements,photocatalytic water splitting experiments,and Mie calculation.The incident electricfield amplitude was doubled in hollow nanoshells,allowing for increased light trapping.Additionally,the spatially separated Pt and RuO2cocatalysts on the inner and outer surfaces facilitated the separation of photoinduced electrons and holes.Pt@TiO2@RuO2hollow nanoshells exhibited superior photocatalytic water splitting performance,with a stable H2generation rate of 50.1μmol g−1h−1and O2evolution rate of 25.1μmol g−1h−1,outperforming other nanostructures such as TiO2,Pt@TiO2,and TiO2@RuO2hollow nanoshells.This study suggests that dielectric Mie resonance and spatially-separated cocatalysts offer a new approach to simultaneously enhance light absorption and charge carrier transfer in photocatalysis. 展开更多
关键词 Dielectric Mie resonance Hollow nanoshells Spatial charge separation Overall water splitting Photocatalysis
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Arc morphology and properties of plasma arc welding of Q235B steel via rotating tungsten electrode 认领 引用
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作者 Hongyu Wang Yu Sun +6 位作者 Guang Ma Dawei Wang Hongtao Zhang Xiaoya Tang Siheng Tan Rongmao Du Yuxiao Zhu 《China Welding》 CAS 2025年第3期217-228,共12页
A high-quality welding method,named plasma arc welding apparatus with rotating tungsten electrode(abbreviated as PAW-RT),was proposed in this paper.The rotation speed could be adjusted from 0 to 15000 r/min.The rotary... A high-quality welding method,named plasma arc welding apparatus with rotating tungsten electrode(abbreviated as PAW-RT),was proposed in this paper.The rotation speed could be adjusted from 0 to 15000 r/min.The rotary motion of the tungsten needle trans-ferred circumferential momentum to the arc as well as the molten pool,thereby conferring the latter with rotating fluid flow charac-teristics.The influences of tungsten electrode rotation speed on PAW arc morphology,weld formation and interfacial microstructure of the final weld joints were discussed by the experimental procedures involving in-situ ablation,surfacing and butt welding.The ex-periments were conducted on Q235B steel.The results indicated that the increase of tungsten electrode rotation speed in PAW-RT contributed to improving arc eccentricity,leading to aesthetically improved welds with more uniformity.Additionally,the strength,hardness and toughness of the welded joint increased,while porosity was reduced. 展开更多
关键词 Rotating tungsten electrode Arc morphology Microstructure characteristics Mechanical properties
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东北地区张广才岭2015–2020年野生动物红外相机监测数据集 认领 引用 被引量：1
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作者 王大伟 程帅 +1 位作者 冯佳伟 王天明 《生物多样性》 CAS CSCD 北大核心 2025年第2期115-119,共5页
长期监测不同生物类群和不同时空尺度的生物多样性,对于摸清我国生物多样性的资源家底、时空动态、威胁因子和保护现状具有重要意义。张广才岭位于黑龙江省中南部和吉林省东部,是我国东北虎(Pantheratigrisaltaica)潜在的栖息地之一。... 长期监测不同生物类群和不同时空尺度的生物多样性,对于摸清我国生物多样性的资源家底、时空动态、威胁因子和保护现状具有重要意义。张广才岭位于黑龙江省中南部和吉林省东部,是我国东北虎(Pantheratigrisaltaica)潜在的栖息地之一。本文整理了张广才岭南部2015年8月至2020年11月的红外相机监测记录,并进行了详细的物种鉴定,提供了包含72个有效红外相机位点的完整监测数据集。红外相机累计工作88,093个相机工作日,共获得野生兽类独立事件9,206次,野生鸟类独立事件655次。经鉴定,兽类有5目11科18种,鸟类有9目16科31种。本数据集展示了相机位点坐标、相机工作日、兽类和鸟类物种独立事件数和不同监测年度下每个相机位点拍摄的不同物种独立事件数,以及整体鸟兽物种名录(包括濒危等级和相对多度指数等)。该数据集是张广才岭地区开展红外相机监测工作以来首次全面的成果汇总,可为保护区制定管理决策提供科学依据。 展开更多
关键词 红外相机 物种编目 野生动物监测 张广才岭
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