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Sub-nanopores-containing N,O-codoped porous carbon from molecular-scale networked polymer hydrogel for solid-state supercapacitor

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Chinese Chemical Letters 2021年第3期32卷 1111-1116页

作者： Meiling Wang Tianyuan Zhang Mingzhu Cui Weifeng Liu Xuguang Liu Jianwei Zhao jiadong zhou Institute of New Carbon Materials Taiyuan University of TechnologyTaiyuan 030024China College of Material and Textile Engineering Jiaxing UniversityJiaxing 314001China Department of Chemistry University of WashingtonSeattleWashington 98195United States School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Institute of Crystalline Materials Shanxi UniversityTaiyuan 030006China

A template-free carbonization-activation route is developed to fabricate sub-nanopore-containing porous carbon by using a novel polypyrrole(PPy)hydrogel as a precursor.This design of PPy hydrogel precursor containing molecular-scale grids(diameter~2.0 nm)allows for homogeneous N,O-codoping into the porous carbon scaffold during the pyrolysis process.A subsequent activation step produces activated porous carbons(APCs)with tailored pore structures,which renders the APCs abundant subnanopores on their surface to increase the specific capacitance as extra capacitance sites.Coupled with large specific surface area and abundant heteroatoms,the optimized APC4/1 displays excellent specific capacitance of 379 F/g for liquid-state supercapacitor and 230 F/g for solid-state supercapacitor.The solid-state supercapacitor shows a high energy density of 22.99 Wh/kg at power density of 420 W/kg,which is higher than most reported porous carbon materials and satisfy the urgent requirements of elementary power source for electric vehicles.Moreover,this method can be easily modified to fabricate sub-nanopore-containing porous carbons with preferred structures and compositions for many applications.

关键词： Hydrogel Sub-nanopores Carbonization-activation Porous carbon Heteroatomdoping Solid-state supercapacitor

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“双一流”建设下研究型高级工程师培养探索与实践——以南京工业大学为例

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江苏科技信息 2024年第9期41卷 22-25,29页

作者：周佳栋南京工业大学学科建设处江苏南京211816

培养集战略科学家与领军人才于一身的研究型高级工程师是研究生层次高等工程教育的重要内容,是培养创新型、复合型、交叉型高端工程技术人才的新途径。文章剖析“双一流”建设下我国工程师培养现状及存在问题;进而借鉴国内外相关研究经... 详细信息

培养集战略科学家与领军人才于一身的研究型高级工程师是研究生层次高等工程教育的重要内容,是培养创新型、复合型、交叉型高端工程技术人才的新途径。文章剖析“双一流”建设下我国工程师培养现状及存在问题;进而借鉴国内外相关研究经验,创新提出研究型高级工程师的培养定位和应具备的特质;通过强化“一观三力”教育,探索研究型高级工程师高质量培养路径并付诸具体实践,在南京工业大学取得良好实践成效。

关键词： “双一流”建设研究型工程师工程教育研究生教育

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“双一流”建设下提高专业学位研究生学位授予质量探索与实践

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江苏科技信息 2024年第1期41卷 68-71页

作者：周佳栋南京工业大学学科建设处江苏南京211816

研究生学位授予质量并不仅是狭义上的、单指学位授予环节或学位论文的质量,而应是广义上的、涵盖研究生教育从招生、培养、授予学位到就业发展的全过程质量。文章在“双一流”建设背景下,剖析专业学位研究生学位授予质量现状及存在问题... 详细信息

研究生学位授予质量并不仅是狭义上的、单指学位授予环节或学位论文的质量,而应是广义上的、涵盖研究生教育从招生、培养、授予学位到就业发展的全过程质量。文章在“双一流”建设背景下,剖析专业学位研究生学位授予质量现状及存在问题,进而参考国内外相关研究经验,构建专业学位研究生“三层次、四主体、五维度”学位授予质量体系,从生源质量、培养质量、指导质量、学位质量、发展质量5个方面提出提高专业学位研究生学位授予质量的可行性对策建议。

关键词： “双一流”建设专业学位研究生学位授予质量质量体系

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Phase-pure two-dimensional Fe_(X)GeTe_(2) magnets with near-room-temperature Tc

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Nano Research 2022年第1期15卷 457-464页

作者： Govindan Kutty Rajendran Nair Zhaowei Zhang Fuchen Hou§ Ali Abdelaziem Xiaodong Xu Steve Wu Qing Yang Nan Zhang Weiqi Li Chao Zhu Yao Wu Heng Weiling Lixing Kang Teddy Salim jiadong zhou Lin Ke Junhao Lin Xingji Li Weibo Gao Zheng Liu School of Material Science and Engineering 50 Nanyang Ave639798Singapore Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological University21 Nanyang Link637371 Singapore Department of Physics Southern University of Science and TechnologyShenzhen 518055China Institute of Materials Research and Engineering Agency for Science Technology and Research(A*STAR)2 Fusionopolis WaySingapore 138634Singapore School of Material Science and Engineering School of PhysicsHarbin Institute of TechnologyHarbin 150001China Shenzhen Key Laboratory of for Advanced Quantum Functional Materials and Devices Southern University of Science and TechnologyShenzhen 518055China National Institute of Laser Enhanced Sciences(NILES) Cairo UniversityGiza 12613Egypt CINTRA CNRS/NTU/THALES UMI3288Research Techno Plaza637553Singapore School of Electrical and Electronic Engineering Nanyang Technological University50 Nanyang Ave639798Singapore

Two-dimensional(2D)ferromagnets with out-of-plane(OOP)magnetic anisotropy are potential candidates for realizing the next-generation memory devices with ultra-low power consumption and high storage density.However,a scalable approach to synthesize 2D magnets with OOP anisotropy directly on the complimentary metal-oxide semiconductor(CMOS)compatible substrates has not yet been mainly explored,which hinders the practical application of 2D magnets.This work demonstrates a cascaded space confined chemical vapor deposition(CS-CVD)technique to synthesize 2D FexGeTe_(2) ferromagnets.The weight fraction of iron(Fe)in the precursor controls the phase purity of the as-grown FexGeTe2.As a result,high-quality Fe_(3)GeTe_(2) and Fe_(5)GeTe_(2) flakes have been grown selectively using the CS-CVD technique.Curie temperature(Tc)of the as-grown FexGeTe2 can be up to-280 K,nearly room temperature.The thickness and temperature-dependent magnetic studies on the Fe_(5)GeTe_(2) reveal a 2D Ising to 3D XY behavior.Also,Terahertz spectroscopy experiments on Fe_(5)GeTe_(2) display the highest conductivity among other FexGeTe_(2) 2D magnets.The results of this work indicate a scalable pathway for the direct growth and integration of 2D ternary magnets on CMOS-based substrates to develop spintronic memory devices.

关键词： cascaded space confined chemical vapor deposition(CVD) van der Waals(vdW) ferromagnetism out of plane anisotropy iron germanium telluride terahertz

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The effect of interfacial diffusion on device performance of polymer solar cells: a quantitative view by active-layer doping

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Science China Chemistry 2015年第2期58卷 317-322页

作者： Li Nian jiadong zhou Kai Zeng Xiaoyan Wu Linlin Liu Zengqi Xie Fei Huang Yuguang Ma Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology

The diffusion of constituent materials at interfaces is one of the key factors for device performance and stability.In this work,the effect of interfacial diffusion of a classic interfacial material PFN on device performance of polymer solar cells was studied quantitatively by doping PFN into active layer based on P3HT:PC61BM blend.The PCEs of devices with 550 ppm PFN decrease to half compared to those of the control devices without PFN,which are mainly attributed to the decrease of short-circuit current(Jsc)and fill factor(FF).Advanced analyses of equivalent circuit,absorption spectra,and atomic force microscopy indicates that the presence of PFN in the active layer increases the leakage current,decreases the aggregation of P3HT,and reduces the phase separation.This research reveals the physical mechanism of interfacial diffusion in device performance and provides a basis for further improving the performance and stability of PSCs.

关键词：界面扩散太阳能电池聚合物过掺杂性能器件有源层视图

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Giant excitonic upconverted emission from two-dimensional semiconductor in doubly resonant plasmonic nanocavity

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Light(Science & Applications) 2022年第7期11卷 1523-1534页

作者： Pengfei Qi Yuchen Dai Yang Luo Guangyi Tao Liheng Zheng Donglin Liu Tianhao Zhang jiadong zhou Bo Shen Feng Lin Zheng Liu Zheyu Fang School of Physics State Key Laboratory for Mesoscopic PhysicsAcademy for Advanced Interdisciplinary StudiesCollaborative Innovation Center of Quantum MatterNano-optoelectronics Frontier Center of Ministry of EducationPeking UniversityBeijing 100871China Institute of Modern Optics Nankai UniversityTianjin Key Laboratory of Micro-scale Optical Information Science and TechnologyTianjin 300350China Photonics Research Center School of PhysicsMOE Key Lab of Weak-Light Nonlinear Photonicsand Tianjin Key Lab of Photonics Materials and Technology for Information ScienceNankai UniversityTianjin 300071China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore

Phonon-assisted upconverted emission is the heart of energy harvesting,bioimaging,optical cryptography,and optical refrigeration.It has been demonstrated that emerging two-dimensional(2D)semiconductors can provide an excellent platform for efficient phonon-assisted upconversion due to the enhanced optical transition strength and phonon-exciton interaction of 2D excitons.However,there is little research on the further enhancement of excitonic upconverted emission in 2D semiconductors.Here,we report the enhanced multiphoton upconverted emission of 2D excitons in doubly resonant plasmonic nanocavities.Owing to the enhanced light collection,enhanced excitation rate,and quantum efficiency enhancement arising from the Purcell effect,an upconverted emission amplification of>1000-fold and a decrease of 2~3 orders of magnitude in the saturated excitation power are achieved.These findings pave the way for the development of excitonic upconversion lasing,nanoscopic thermometry,and sensing,revealing the possibility of optical refrigeration in future 2D electronic or excitonic devices.

关键词： converted resonant doubly

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Diffraction-limited imaging with monolayer 2D material-based ultrathin flat lenses

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Light(Science & Applications) 2020年第1期9卷 696-706页

作者： Han Lin Zai-Quan Xu Guiyuan Cao Yupeng Zhang jiadong zhou Ziyu Wang Zhichen Wan Zheng Liu Kian Ping Loh Cheng-Wei Qiu Qiaoliang Bao Baohua Jia Centre for Translational Atomaterials Faculty of ScienceEngineering and TechnologySwinburne University of TechnologyP.O.Box 218HawthornVIC 3122Australia Department of Materials Science and Engineering ARC Centre of Excellence in Future Low-Energy Electronics Technologies(FLEET)Monash UniversityWellington RoadClaytonVIC 3800Australia School of Mathematical and Physical Sciences Faculty of ScienceUniversity of Technology Sydney15 BroadwayUltimoNSW 2007Australia Institute of Microscale Optoelectronics Lab of Artificial Microstructure for OptoelectronicsShenzhen University518000 ShenzhenChina School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Department of Chemistry National University of SingaporeSingapore 117543Singapore Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore The Australian Research Council(ARC)Industrial Transformation Training Centre in Surface Engineering for Advanced Materials(SEAM) Swinburne University of TechnologyP.O.Box 218HawthornVIC 3122Australia

Ultrathin flat optics allow control of light at the subwavelength scale that is unmatched by traditional refractive optics.To approach the atomically thin limit,the use of 2D materials is an attractive possibility due to their high refractive indices.However,achievement of diffraction-limited focusing and imaging is challenged by their thickness-limited spatial resolution and focusing efficiency.Here we report a universal method to transform 2D monolayers into ultrathin flat lenses.Femtosecond laser direct writing was applied to generate local scattering media inside a monolayer,which overcomes the longstanding challenge of obtaining sufficient phase or amplitude modulation in atomically thin 2D materials.We achieved highly efficient 3D focusing with subwavelength resolution and diffractionlimited imaging.The high focusing performance even allows diffraction-limited imaging at different focal positions with varying magnifications.Our work paves the way for downscaling of optical devices using 2D materials and reports an unprecedented approach for fabricating ultrathin imaging devices.

关键词： ultrathin scattering optics

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2D/2D atomic double-layer WS_(2)/Nb_(2)O_(5)shell/core nanosheets with ultrafast interfacial charge transfer for boosting photocatalytic H_(2)evolution

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Chinese Chemical Letters 2021年第10期32卷 3128-3132页

作者： Bo Lin Hao Chen Yao zhou Xiao Luo Dan Tian Xiaoqing Yan Ruihuan Duan Jun Di Lixing Kang Aimin zhou Guidong Yang Yonghui Li jiadong zhou Zheng Liu Fucai Liu School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Wuhan Second Ship Design and Research Institute Wuhan 430200China School of Physical and Mathematical Sciences Nanyang Technological UniversitySingapore 637371Singapore College of Materials Science and Engineering Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesNanjing Forestry UniversityNanjing 210037China XJTU-Oxford International Joint Laboratory for Catalysis School of Chemical Engineering and TechnologyXi'an Jiaotong UniversityXi’an 710049China School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Department of Physics and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology School of ScienceTianjin UniversityTianjin 300350China Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement(Ministry of Education) Beijing Key Lab of Nanophotonics&Ultrafine Optoelectronic Systemsand School of PhysicsBeijing Institute of TechnologyBeijing 100081China

Low-efficiency charge transfer is a critical factor to limit the photocatalytic H_(2)evolution activity of semiconductor photocatalysts.The interface design is a promising approach to achieve high chargetransfer efficiency for photocatalysts.Herein,a new 2 D/2 D atomic double-layer WS_(2)/Nb_(2)O_(5)shell/core photocatalyst(DLWS/Nb_(2)O_(5))is designed.The atom-resolved HAADF-STEM results unravel the presence of an unusual 2 D/2 D shell/core interface in DLWS/Nb_(2)O_(5).Taking advantage of the advanced femtosecond-resolved ultrafast TAS spectra,the average lifetime of charge carriers for DLWS/Nb_(2)O_(5)(180.97 ps)is considerably shortened as compared to that of Nb_(2)O_(5)(230.50 ps),strongly indicating that the 2 D/2 D shell/core interface enables DLWS/Nb_(2)O_(5)to achieve ultrafast charge transfer from Nb_(2)O_(5)to atomic double-layer WS_(2),thus yielding a high photocatalytic H_(2)evolution rate of 237.6 mmol/h,up to10.8 times higher than that of pure Nb_(2)O_(5)nanosheet.This study will open a new window for the development of high-efficient photocatalytic systems through the interface design.

关键词： 2D/2D shell/core interface Atomic double-layer WS_(2) Nb_(2)O_(5)nanosheet Charge transfer Photocatalytic H_(2)evolution

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Raman scattering investigation of twisted WS_(2)/MoS_(2) heterostructures: interlayer mechanical coupling versus charge transfer

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Nano Research 2021年第7期14卷 2215-2223页

作者： Lishu Wu Chunxiao Cong Jingzhi Shang Weihuang Yang Yu Chen jiadong zhou Wei Ai Yanlong Wang Shun Feng Hongbo Zhang Zheng Liu Ting Yu Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore School of Information Science and Technology Fudan UniversityShanghai 200433China Shaanxi Institute of Flexible Electronics Northwestern Polytechnical UniversityXi’an 710129China Engineering Research Center of Smart Microsensors and Microsystems Ministry of EducationCollege of Electronics and InformationHangzhou Dianzi UniversityHangzhou 310018China School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Key Laboratory of Chemical Lasers Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Twisted van der Waals homo-and hetero-structures have aroused great attentions due to their unique physical properties,providing a new platform to explore the novel two-dimensional(2D)condensed matter physics.The robust dependence of phonon vibrations and electronic band structures on the twist angle has been intensively observed in transition metal dichalcogenide(TMD)homo-structures.However,the effects of twist angle on the lattice vibrational properties in the TMD heterostructures have not caused enough attention.Here,we report the distinct evolutions of Raman scattering and the underlying interlayer interactions in the twisted WS_(2)/MoS_(2) heterostructures.The shifts and linewidths of E_(2g)(Γ)and A_(1g)(Γ)phonon modes are found to be twist angle dependent.In particular,analogous to that of the twisted TMD homostructures,the frequency separations between E_(2g)(Γ)and A_(1g)(Γ)modes of MoS_(2) and WS_(2) in the twisted heterostructures varying with twist angle correlate with the interlayer mechanical coupling,essentially originating from the spacing-related repulsion between sulfur atoms.Moreover,the opposite shift behaviors and broadening of A_(1g)(Γ)modes caused by charge transfer are also observed in the twisted heterostructures.The calculated interlayer distances and band alignment of twisted WS_(2)/MoS_(2) through density functional theory further evidence our interpretations on the roles of the interlayer mechanical coupling and charge transfer in variations of Raman features.Such understanding and controlling of interlayer interaction through the stacking orientation are significant for future optoelectronic device design based on the newly emerged 2D heterostructures.

关键词： van der Waals heterostructures interlayer coupling Raman scattering twist angle charge transfer

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Enhancing photovoltaic performance via aggregation dynamics control in fused-ring electron acceptor

Aggregate

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Aggregate 2021年第3期2卷 1-8页

作者： Jiayu Wang Runyu Zhu Shijie Wang Yawen Li Boyu Jia jiadong zhou Peiyao Xue Susanne Seibt Yuze Lin Zengqi Xie Wei Ma Xiaowei Zhan Department of Materials Science and Engineering College of EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry of EducationPeking UniversityBeijingChina State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’anChina Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijingChina Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhouChina Australian Synchrotron ClaytonVictoriaAustralia

A new fused-ring electron acceptor FNIC3 with dynamics controlled aggregation behavior was synthesized.FNIC3 shows strong absorption in 600–900 nm,HOMO/LUMO energy levels of−5.59/−4.04 eV,and electron mobility of 1.2×10^(−3) cm^(2) V^(−1) s^(−1).The aggregation of FNIC3 shows strong dependency on film formation time.Prolongation of film formation time promotes the crystallization of FNIC3,leading to improved crystallinity and enlarged aggregate sizes.Aggregation of FNIC3 significantly influences the photovoltaic device parameters.Appropriate aggregation red-shifts the absorption and improves the mobilities of the blend,which contributes to high photocurrent and fill factor thus high power conversion efficiency(PCE).Overaggregation leads to increased nonradiative energy loss and insufficient charge generation,resulting in decreased open-circuit voltage and short-circuit current density.The blends based on PM6:FNIC3 fabricated under proper film formation time exhibit a PCE of 12.3%,higher than those fabricated under short and long film formation time(10.0–10.5%).

关键词： aggregation dynamics fused-ring electron acceptor nonfullerene acceptor organic solar cell

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