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Two‑Dimensional Cr_(5)Te_(8)@Graphite Heterostructure for Efficient Electromagnetic Microwave Absorption

Nano-Micro Letters 2024年第3期16卷 407-422页

作者： Liyuan Qin Ziyang Guo Shuai Zhao Denan Kong Wei Jiang Ruibin Liu Xijuan Lv jiadong zhou Qinghai Shu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081People’s Republic of China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081People’s Republic of China Tangshan Research Institute Beijing Institute of TechnologyTangshan 063099People’s Republic of China

Two-dimensional(2D)transition metal chalcogenides(TMCs)hold great promise as novel microwave absorption materials owing to their interlayer interactions and unique magnetoelectric ***,overcoming the impedance mismatch at the low loading is still a challenge for TMCs due to the restricted loss pathways caused by their high-density ***,an interface engineering based on the heterostructure of 2D Cr_(5)Te_(8) and graphite is in situ constructed via a one-step chemical vapor deposit to modulate impedance matching and introduce multiple attenuation ***,the Cr_(5)Te_(8)@EG(ECT)heterostructure exhibits a minimum reflection loss of up to−57.6 dB at 15.4 GHz with a thin thickness of only 1.4 mm under a low filling rate of 10%.The density functional theory calculations confirm that the splendid performance of ECT heterostructure primarily derives from charge redistribution at the abundant intimate interfaces,thereby reinforcing interfacial polarization ***,the ECT coating displays a remarkable radar cross section reduction of 31.9 dB m^(2),demonstrating a great radar microwave scattering *** work sheds light on the interfacial coupled stimulus response mechanism of TMC-based heterogeneous structures and provides a feasible strategy to manipulate high-quality TMCs for excellent microwave absorbers.

关键词： Chemical vapor deposition Interface polarization engineering Cr_(5)Te_(8)-graphite heterojunctions Microwave absorption

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Excitons in confined molecular aggregates

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Information ＆ Functional Materials 2024年第1期1卷 68-86页

作者： Xiaozhen Chen jiadong zhou Zengqi Xie Yuguang Ma State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesGuangdong Basic Research Center of Excellence for Energy&Information Polymer MaterialsSouth China University of TechnologyGuangzhouChina

Organic optoelectronic materials have attracted extensive attention in the past decades due to their wide applications in organic light‐emitting diodes(OLEDs),organic photovoltaics(OPVs),photocatalysis,*** ad-vancements have been obtained in the material designs based on the insight into the fundamental physics of exciton related to molecular stacking patterns in solid/condensed *** exciton characteristics and behaviors are not only a starting point for studying photophysical and photochemical processes on a microscopic level,but also a crucial point in determining the optoelec-tronic properties of macroscopic *** review summarizes the historic development of exciton models,accompanied by the discoveries of special molecular stacking patterns(H‐/J‐/X‐/M‐aggregates),and the competitive de‐excitation pathways of excitons including fluorescence,energy transfer,singlet fission,excimer formation and symmetry‐breaking charge separation in the confined aggregate ***,it highlights the capabilities of a correlation between molecular stacking modes and exciton behaviors,which provides new insights and perspectives for optimizing exciton character and behavior through the modulation of molecular arrangement in aggregate states,thereby enhancing the performance of optoelectronic materials.

关键词： aggregate mode energy transfer exciton model fluorescence organic optoelectronic material

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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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Evolving insights:how DNA repair pathways impact cancer evolution

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Cancer Biology & Medicine 2020年第4期17卷 805-827页

作者： jiadong zhou Xiao Albert zhou Ning Zhang jiadong Wang Department of Radiation Medicine Institute of Systems BiomedicineSchool of Basic Medical SciencesPeking University Health Science CenterBeijing 100191China Biomedical Pioneering Irmovation Center(BIOPIC)and Translational Cancer Research Center School of Life SciencesFirst HospitalPeking UniversityBeijing 100871China Laboratory of Cancer Cell Biology Tianjin Medical University Cancer Instituteand HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin's Clinical Research Center for CancerTianjin 300060China

Viewing cancer as a large,evolving population of heterogeneous cells is a common *** genomic instability is one of the fundamental features of cancer,this intrinsic tendency of genomic variation leads to striking intratumor heterogeneity and functions during the process of cancer formation,development,metastasis,and *** the increased mutation rate and abundant diversity of the gene pool,this heterogeneity leads to cancer evolution,which is the major obstacle in the clinical treatment of *** rely on the integrity of DNA repair machineries to maintain genomic stability,but these machineries often do not function properly in cancer *** deficiency of DNA repair could contribute to the generation of cancer genomic instability,and ultimately promote cancer *** the rapid advance of new technologies,such as single-cell sequencing in recent years,we have the opportunity to better understand the specific processes and mechanisms of cancer evolution,and让s relationship with DNA ***,we review recent findings on how DNA repair affects cancer evolution,and discuss how these mechanisms provide the basis for critical clinical challenges and therapeutic applications.

关键词： DNA repair cancer evolution intratumor heterogeneity genomic instability drug resistance

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Ultrafast quasi-three-dimensional imaging

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International Journal of Extreme Manufacturing 2023年第4期5卷 501-512页

作者： Yiling Lian Lan Jiang Jingya Sun jiadong zhou Yao zhou Laser Micro/Nano Fabrication Laboratory School of Mechanical EngineeringBeijing Institute of TechnologyBeijing 100081People’s Republic of China Yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing 314019People’s Republic of China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120People’s Republic of China Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081People’s Republic of China Advanced Research Institute of Multidisciplinary Sciences Beijing Institute of TechnologyBeijing 100081People’s Republic of China

Understanding laser induced ultrafast processes with complex three-dimensional(3D)geometries and extreme property evolution offers a unique opportunity to explore novel physical phenomena and to overcome the manufacturing *** imaging offers exceptional spatiotemporal resolution and thus has been considered an effective ***,in conventional single-view imaging techniques,3D information is projected on a two-dimensional plane,which leads to significant information loss that is detrimental to understanding the full ultrafast ***,we propose a quasi-3D imaging method to describe the ultrafast process and further analyze spatial asymmetries of laser induced *** polarized laser pulses are adopted to illuminate reflection-transmission views,and binarization techniques are employed to extract contours,forming the corresponding two-dimensional *** rotating and multiplying the two-dimensional contour matrices obtained from the dual views,a quasi-3D image can be *** successfully reveals dual-phase transition mechanisms and elucidates the diffraction phenomena occurring outside the ***,the quasi-3D image confirms the spatial asymmetries of the picosecond plasma,which is difficult to achieve with two-dimensional *** findings demonstrate that quasi-3D imaging not only offers a more comprehensive understanding of plasma dynamics than previous imaging methods,but also has wide potential in revealing various complex ultrafast phenomena in related fields including strong-field physics,fluid dynamics,and cutting-edge manufacturing.

关键词： ultrafast imaging extraction and reconstruction quasi-three-dimension plasma diffraction

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计及改进粒子群算法优化BP神经网络的沼气产量软测量预测模型

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太阳能学报 2024年第8期45卷 643-650页

作者：于雪彬贾宇琛高立艾周加栋霍利民河北农业大学机电工程学院保定071001 河北省畜禽养殖智能装备与新能源利用重点实验室保定071001 河北聚碳生物科技有限公司衡水053000

为准确预测大中型沼气工程的日产气量,提出一种利用基于PSO-BP模型的软测量方法。首先,依托软测量技术选取参数;其次,以进料量、发酵温度、液位、罐内液压等参数作为输入量,沼气日产量为输出量进行模型建立。在此基础上,使用线性降低权... 详细信息

为准确预测大中型沼气工程的日产气量,提出一种利用基于PSO-BP模型的软测量方法。首先,依托软测量技术选取参数;其次,以进料量、发酵温度、液位、罐内液压等参数作为输入量,沼气日产量为输出量进行模型建立。在此基础上,使用线性降低权重系数法和引入变异算子对粒子群算法进行改进,并对BP神经网络进行初始化来提高模型性能。通过实验比较改进PSO-BP模型、传统BP神经网络以及遗传算法优化的BP神经网络在预测沼气日产量方面的性能,采用改进的PSO-BP模型进行预测时,均方根误差(RMSE)、决定系数(R2)和平均绝对误差(MAE)分别为1.38440、0.84011和1.00910,证明改进PSO-BP模型结合软测量技术对进行复杂非线性牛粪高温厌氧发酵过程预测的可行性,同时可保证预测结果的精准性。

关键词：生物质能沼气粒子群优化算法 BP神经网络软测量技术

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Regulating the dimensionality of diphosphaperylenediimide-based polymers by coordinating the out-of-plane anisotropic π-framework toward Ag^(+)

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Science China Chemistry 2022年第9期65卷 1741-1748页

作者： Zetong Ma Yujian Liu Shengdong Wang jiadong zhou Zhaohui Wang Wei Jiang Key Laboratory of Organic Optoelectronics and Molecular Engineering Department of ChemistryTsinghua UniversityBeijing 100084China Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou 510640China

The development of hetero-π-conjugated molecules is of significance for constructing diverse assembling superstructures based on heteroatom-related bonded or nonbonded ***,we developed one-pot P-heteroannulation via palladiumcatalyzed dual P-C bonds formation and subsequent sulfidation to construct two isomeric diphosphaperylenediimides(cis-5 and trans-5).The unique out-of-plane anisotropic π-framework induced a cumulative anisotropy with a dipole moment of up to 8.82 D for cis-5,leading to distinct supramolecular packing *** and electrochemical characterizations demonstrated that they showed the largest redshifts extending to 574 nm and rather low-lying LUMO levels of −4.41 ***,the introduced P=S moieties endowed these diphosphaperylenediimides with prominent coordination ability towards Ag^(+),and thus the first example of perylene diimide(PDI)core-involved metal-organic coordination polymers(MOCPs)with tunable dimensionality varying from 1D,2D,to 3D was tactfully *** view of easy accessibility and 2D layered porous structure,thus 2D(trans-5)·(AgOTf)based MOCP showed high crystallinity and good CO_(2) adsorption capacity with surface area of 112 m^(2)/*** result opens a span-new avenue for exploring rylene imide-based MOCPs and related properties by integrating P functionality.

关键词： metal-organic coordination polymers perylene diimides phosphorous heteroannulation dimensionality gas adsorption

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Preparation and electronic characteristics of anionic perylene bisimide films

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Science China Chemistry 2017年第10期60卷 1334-1339页

作者： Wenqiang Zhang Qinglin Jiang jiadong zhou Dehua Hu Xuehong zhou Weitao Ma Muddasir Hanif Zengqi Xie Linlin Liu Yuguang Ma State Key Laboratory of Supramolecular Structure and Materials Jilin University Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology

Neutral perylene bisimides(PBI) are well-known n-type organic semiconductors, with number of challenging electronic properties in their neutral and reduced states. We report the characteristic electronic properties of PBI anionic films. We unexpectedly discovered that pristine PBI dianion film showed p-type character, while oxidized dianion film(dominant neutral state with few radical anions) showed normal n-type semiconductor character based on Seebeck effect measurements. Both kinds of films exhibit high electrical conductivity with a potential for thermoelectric applications. The mechanism of polarity reversal is proposed.

关键词： dianion/radical anion elelctrical conductivity perylene bisimide p-type thermoelectric conversion

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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 *** 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 *** 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 *** 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 ***,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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Magnetic proximity effect in the two-dimensional ε-Fe_(2)O_(3)/NbSe_(2)heterojunction

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Chinese Physics B 2024年第2期33卷 492-497页

作者：车冰玉胡国静朱超郭辉吕森浩刘轩冶吴康赵振潘禄禄祝轲齐琦韩烨超林晓李子安申承民鲍丽宏刘政周家东杨海涛高鸿钧 Beijing National Center for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China School of Materials Science and Engineering Nanyang Technological UniversitySingapore School of Physical Science and Technology Guangxi UniversityGuangxi 530004China School of Physics Beijing Institute of TechnologyBeijing 100081China

Two-dimensional(2D)magnet/superconductor heterostructures can promote the design of artificial materials for exploring 2D physics and device applications by exotic proximity ***,plagued by the low Curie temperature and instability in air,it is hard to realize practical applications for the reported layered magnetic materials at *** this paper,we developed a space-confined chemical vapor deposition method to synthesize ultrathin air-stable ε-Fe_(2)O_(3) nanosheets with Curie temperature above 350 *** ε-Fe_(2)O_(3)/NbSe_(2) heterojunction was constructed to study the magnetic proximity effect on the superconductivity of the NbSe_(2) *** electrical transport results show that the subtle proximity effect can modulate the interfacial spin–orbit interaction while undegrading the superconducting critical *** work paves the way to construct 2D heterojunctions with ultrathin nonlayered materials and layered van der Waals(vdW)materials for exploring new physical phenomena.

关键词： two-dimensional heterojunctions magnetic proximity effect non-layered magnetic nanosheet spin-orbit interaction

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