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Pushing the high-k scalability limit with a superparaelectric gate layer

Journal of advanced Ceramics 2024年第4期13卷 539-547页

作者： Kun Wang Chao Liu Yuan Zhang Fuyu Lv Jun Ouyang Houbing Huang Rui-Long Yang Yu-Yao Zhao Hongbo Cheng Hanfei Zhu Xiaoming Shi Yun Tian Institute of Advanced Energy Materials and Chemistry Jinan Engineering Laboratory for Multi-scale Functional MaterialsSchool of Chemistry and Chemical EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China Key Laboratory for Liquid-Solid Structure Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China China Tobacco Shandong Industrial Co. Ltd.Jinan 250104China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Key Laboratory of Key Film Materials&Application for Equipments(Hunan Province) School of Material Sciences and EngineeringXiangtan UniversityXiangtan 411105China Advanced Research Institute of Multidisciplinary Science and School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education School of Chemistry and Materials ScienceShanxi Normal UniversityTaiyuan 030032China

To meet the expectation set by Moore’s law on transistors,the search for thickness-scalable high dielectric constant(k)gate layers has become an emergent research *** investigations have failed to solve the“polarizability–scalability–insulation robustness”*** this work,we show that this trilemma can be solved by using a gate layer of a high k ferroelectric oxide in its superparaelectric(SPE)*** the SPE,its polar order becomes local and is dispersed in an amorphous matrix with a crystalline size down to a few nanometers,leading to an excellent dimensional scalability and a good field-stability of the k *** an example,a stable high k value(37±3)is shown in ultrathin SPE films of(Ba_(0.95),Sr_(0.05))(Zr_(0.2),Ti_(0.8))O_(3)deposited on LaNiO_(3)-buffered Pt/Ti/SiO_(2)/(100)Si down to a 4 nm thickness,leading to a small equivalent oxide thickness of~0.46 *** aforementioned characteristic microstructure endows the SPE film a high breakdown strength(~10.5 MV·cm^(−1)for the 4 nm film),and hence ensures a low leakage current for the operation of the complementary metal oxide semiconductor(CMOS)***,a high electrical fatigue resistance is displayed by the SPE *** results reveal a great potential of superparaelectric materials as gate dielectrics in the next-generation microelectronics.

关键词： high-k transistors Moore's law superparaelectric insulation robustness

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Bright dual-color electrochemiluminescence of a structurally determined Pt1Ag18 nanocluster

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Aggregate 2024年第1期5卷 345-352页

作者： Bing Yin Lirong Jiang Xiaojian Wang Ying Liu Kaiyang Kuang Mengmeng Jing Chunmin Fang Chuanjun Zhou Shuang Chen Manzhou Zhu Institutes of Physical Science and Information Technology and Centre for Atomic Engineering of Advanced Materials Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationDepartment of Chemistry and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized MaterialsAnhui UniversityHefeiChina

Metal nanoclusters possess excellent electrochemical,optical,and catalytic properties,but correlating these properties remains challenging,which is the foundation to generate electrochemiluminescence(ECL).Herein,we report for the first time that a structurally determined Pt1Ag18 nanocluster generates intense ECL and simultaneously enhances the ECL of carbon dots(CDs)via an electrocatalytic ***^(1)Ag_(18)nanocluster show aggregation-induced emission enhancement and aggregation-induced ECL enhancement under light and electrochemical stimulation,*** the presence of tripropylamine(TPrA)as a coreactant,solid Pt1Ag18 shows unprecedented ECL efficiency,which is more than nine times higher than that of 1 mM Ru(bpy)32+with the same TPrA ***-resolved ECL spectra reveal two ECL emission bands in the presence of *** ECL emission centered at 650 nm is assigned to the solid Pt_(1)Ag_(18)nanocluster,consistent with the peak wavelength in self-annihilation ECL and photoluminescence of the solid *** ECL emission centered at 820 nm is assigned to the CDs on the glassy carbon *** electrocatalytic effect of the nanoclusters enhanced the ECL of the CDs by a factor of more than 180 in comparison to that without *** on the combined optical and electrochemical results,the ECL generation pathways and mechanisms of Pt1Ag18 and CDs are *** findings are extremely promising for designing multifunctional nanocluster luminophores with strong emissions and developing ratiometric sensing devices.

关键词： AIECLE AIEE electrochemiluminescence nanocluster photoluminescence structure

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Slurry flow characteristics control of 3D printed ceramic core layered structure:Experiment and simulation

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Journal of materials science & technology 2023年第33期164卷 215-228页

作者： Qiaolei Li Yuxiang Qiu Weiqiang Hou Jingjing Liang Hui Mei Jinguo Li Yizhou Zhou Xiaofeng Sun School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China Space Manufacturing Technology (CAS Key Lab) Beijing 100094China Science and Technology on Thermostructural Composite Materials Laboratory School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an710072China

Vat photopolymerization 3D printing ceramic technology provides a feasible process for the preparation of complex internal cooling channels for aeroengine single crystal superalloy hollow ***,the typical layered structure characteristics of 3D printing ceramic technology led to the anisotropy of ceramic core strength and sintering shrinkage,which greatly affects the performance and accuracy of the complex structure core and requires further research and ***,the influence of the thickness of the slurry layer on the flow characteristics of the slurry in the process of the vat photopolymerization 3D printing slurry spreading was systematically studied by the method of simulation and *** simulation results show that the positions of the turbulent zone and maximum velocity zone in the scraper front affect the redistribution of powder particles with different *** layered structure was caused by the redistribution of ceramic particles of different sizes in the slurry *** controlling the turbulent flow zone and the maximum velocity zone of the scraper leading edge,the phenomenon of laminar flow can be weakened and the particle redistribution can be *** the increase of the thickness of the printing layer,the layered structure appears gradually,and the pores at the interface of the layered structure gradually concentrated into the interfacial pore lines from the uniform distribution,and the crack propagation changes from intergranular micro-crack to interlayer *** combination of finite element simulation and experiment,through the slurry flow characteristics to control the layered structure of reductive vat photopolymerization ceramic core 3D printing,the control of crack propagation mode,element distribution and pore evolution of the core was accomplished,which lays a foundation for the performance control of ceramic 3D printing technology.

关键词： 3D printing Ceramic cores Slurry flow Lamellar structure Porosity evolution

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Moisture is not always bad:H_(2)O accelerates the conversion of DMAPbI_(3) intermediate to CsPbI_(3)for boosting the efficiency of carbon-based perovskite solar cells to over 16%

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Fundamental Research 2024年第5期4卷 1110-1117页

作者： Hailiang Wang Huicong Liu Zijing Dong Xueyuan Wei Weiping Li Liqun Zhu Cheng Zhu Yang Bai Haining Chen School of Materials Science and Engineering Beihang UniversityBeijing 100191China Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications MIIT Key Laboratory for Low-dimensional Quantum Structure and DevicesExperimental Center of Advanced MaterialsSchool of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China

Inorganic CsPbI_(3)perovskite has exhibited great application potential in perovskite solar cells(PSCs)due to its suitable optical bandgap and high chemical ***,the perovskite phases of CsPbI_(3)are not stable at room temperature,where they transition to non-perovskite *** or water has been thought to be the primary factor inducing this phase transition,which should be avoided throughout the procedure of film and device ***,the present study indicates that preparing a precursor solution in humid air is beneficial to the growth of high-quality CsPbI_(3)perovskite to enhance device *** is demonstrated that the incorporation of H2O in the precursor solution from humid air or by intentional addition significantly changes the composition of coordination compounds and increases the amount of low iodine coordination *** a result,the crystallization of dimethylammonium lead iodide(DMAPbI_(3))intermediate is suppressed well,which accelerates its subsequent conversion to CsPbI_(3)***,an oriented CsPbI_(3)perovskite film with improved crystallinity and lower defect density is *** importantly,carbon-based PSCs(C-PSCs)based on the CsPbI_(3)perovskite film achieve an efficiency of 16.05%,a new record for inorganic C-PSCs.

关键词： Inorganic perovskite CsPbI_(3) Carbon electrode Solar cells Water

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Tunnel-structured willemite Zn_(2)SiO_(4):Electronic structure,elastic,and thermal properties

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Journal of advanced Ceramics 2022年第8期11卷 1249-1262页

作者： Ruqiao DAI Renfei CHENG Jiemin WANG Chao ZHANG Cuiyu LI Hailong WANG Xiaohui WANG Yanchun ZHOU Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Advanced Computing East China Sub-center Suma Technology Company LimitedKunshan 215300China School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China

Willemite Zn_(2)SiO_(4)crystallizes in such a way that Zn and Si are tetrahedrally coordinated with O in an ionic–covalent manner to form ZnO_(4)and SiO_(4)tetrahedra as the building *** tetrahedra are corner-sharing,of which one SiO_(4)tetrahedron connects eight ZnO_(4)tetrahedra,and one ZnO_(4)tetrahedron links four ZnO_(4)tetrahedra and four SiO_(4)*** unique crystallographic configuration gives rise to parallel tunnels with a diameter of 5.7Åalong the c-axis *** tunnel structure of Zn_(2)SiO_(4)definitely correlates with its interesting elastic and thermal *** the one hand,the elastic modulus,coefficient of thermal expansion(CTE),and thermal conductivity are ***_(2)SiO_(4)has low Vickers hardness of 6.6 GPa at 10 N and low thermal conductivity of 2.34 W/(m·K)at 1073 *** the other hand,the elastic modulus and CTE along the c-axis are significantly larger than those along the a-and b-axes,showing obvious elastic and thermal expansion ***,the Young’s modulus along the z direction(Ez=179 GPa)is almost twice those in the x and y directions(Ex=Ey=93 GPa).The high thermal expansion anisotropy is ascribed to the empty tunnels along the c-axis,which are capable of more accommodating the thermal expansion along the a-and *** striking properties of Zn_(2)SiO_(4)in elastic modulus,hardness,CTE,and thermal conductivity make it much useful in various fields of ceramics,such as low thermal expansion,thermal insulation,and machining tools.

关键词： Zn_(2)SiO_(4) electronic structure elastic properties thermal expansion thermal conductivity

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Construction of a High-Quality Organic-Inorganic Hybrid Heterostructure and Its Photo-response Performance

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Chinese Journal of Chemistry 2023年第1期41卷 50-56页

作者： Yadan Zhang Guanghua Yu Di Xue Jie Lu Xing Meng Yao Yin Qi Wang Zi Wang Lizhen Huang Lifeng Chi Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow University199 Ren'ai RoadSuzhouJiangsu 215123China Gusu Laboratory of Materials 388 Ruoshui RoadSuzhouJiangsu 215123China Macao Institute of Materials Science and Engineering(MIMSE) MUST-SUDA Joint Research Center for Advanced Functional MaterialsMacao University of Science and TechnologyTaipa 999078MacaoChina

The combination of metal oxide and organic semiconductor for constructing organic-inorganic hybrid heterostructure is promising to offer unique optoelectronic ***,the distinct difference in electron structure and processing technology of the two types of materials makes it usually difficult to fully deliver their complementary ***,we report the construction of a high quality organic/In_(2)O_(3) hybrid heterostructure presenting a good ambipolar transport with average electron mobility>1 cm^(2)V^(-1)·s^(-1) and hole mobility up to 0.4 cm^(2)·V^(-1)·s^(-1),respectively,together with a high-gain *** addition,the incorporation with organic film on top of In_(2)O_(3) remarkably reduces the dark current,enabling the realization of high photoconductivity response with photo-sensitivity of two magnitudes higher than that of pure *** photoconductor and phototransistor of the hybrid structure demonstrate high photoresponsivity>10^(3) AW^(-1) and detectivity up to 10^(14) Jones,demonstrating the promising functionality of such a high quality hybrid heterostructure.

关键词： Sol-gel process Thin films Semiconductors Phthalocyanines Hybrid heterostructure

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Design and applications of carbon dots-based ratiometric fluorescent probes:A review

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Nano Research 2023年第1期16卷 1064-1083页

作者： Bin-Bin Chen Meng-Li Liu Ya-Ting Gao Shuai Chang Ruo-Can Qian Da-Wei Li Key Laboratory for Advanced Materials Shanghai Key Laboratory of Functional Materials ChemistryFrontiers Science Center for Materiobiology&Dynamic ChemistrySchool of Chemistry&Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhenShenzhen 518172China Department of Chemistry Laboratory of Advanced MaterialsShanghai Key Lab of Molecular Catalysis and Innovative Materials and State Key Laboratory of Molecular Engineering of PolymersCollege of Chemistry and MaterialsFudan UniversityShanghai 200433China

Ratiometric fluorescence(FL)probes can eliminate the background interference and provide more accurate detection results than single emission intensity-based ***,carbon dots(CDs)-based ratiometric FL probes have received extensive research attention due to their excellent biocompatibility,water solubility,and multi-emission *** this review,we firstly summarize the construction strategies of CDs-based ratiometric FL probes,including physical mixing,nanohybrid,and dual-emitting CDs ***,we classify the sensing types of CDs-based ratiometric FL probes into five categories according to the difference in spectral variation caused by analytes:“single-response-ON”,“single-response-OFF”,“doubleresponses-ON”,“double-responses-OFF”,and“double-responses-Reverse”***,a thorough overview of CDs-based ratiometric FL probe applications in ions,molecules,pH,and temperature sensing is *** believe this review can show the latest research progress of CDs-based ratiometric FL sensing fields and provide perspectives on future developments for the construction of CDs-based ratiometric FL probes and their potential applications.

关键词： carbon dots ratiometric fluorescent probes construction strategy sensing type a review

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Microstructure recognition of steels by machine learning based on visual attention mechanism

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Journal of Iron and Steel Research International 2024年第4期31卷 909-923页

作者： Xing-yu Chen Lin Cheng Cheng-yang Hu Yu-peng Zhang Kai-ming Wu The State Key Laboratory of Refractories and Metallurgy Hubei Province Key Laboratory of Systems Science on Metallurgical ProcessingInternational Research Institute for Steel TechnologyCollaborative Center on Advanced SteelsWuhan University of Science and TechnologyWuhan 430081HubeiChina Metals Valley and Band(Foshan)Metallic Composite Materials Co. Ltd.Foshan 528000GuangdongChina

U-Net has achieved good performance with the small-scale datasets through skip connections to merge the features of the low-level layers and high-level layers and has been widely utilized in biomedical image segmentation as well as recent microstructure image segregation of the *** representative visual attention mechanism modules,named as squeeze-and-excitation networks,convolutional block attention module,and extended calibration algorithm,were intro-duced into the traditional U-Net architecture to further improve the prediction *** is found that compared with the original U-Net architecture,the evaluation index of the improved U-Net architecture has been significantly improved for the microstructure segmentation of the steels with the ferrite/martensite composite microstructure and pearlite/ferrite composite microstructure and the complex martensite/austenite island/bainite microstructure,which demonstrates the advantages of the utilization of the visual attention mechanism in the microstructure *** reasons for the accuracy improvement were discussed based on the feature maps analysis.

关键词： Microstructure recognition-Steel Machine learning Visual attention mechanism Visualization

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Carbon Nanofiber/Polyaniline composite Aerogel with Excellent Electromagnetic Interference Shielding,Low Thermal Conductivity,and Extremely Low Heat Release

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Nano-Micro Letters 2025年第4期17卷 77-95页

作者： Mingyi Chen Jian Zhu Kai Zhang Hongkang Zhou Yufei Gao Jie Fan Rouxi Chen Hsing-Lin Wang School of Textile Science and Engineering Tiangong UniversityTianjin 300387People’s Republic of China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055People’s Republic of China School of Innovation and Entrepreneurship Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Guangdong Provincial Key Laboratory of Energy Materials for Electric Power Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Ministry of Education Key Laboratory of Advanced Textile Composite Materials Tiangong UniversityTianjin 300387People’s Republic of China

The rapid development of communication technology and high-frequency electronic devices has created a need for more advanced electromagnetic interference(EMI)shielding *** response to this demand,a study has been conducted to develop multifunctional carbon nanofibers(CNFs)/polyaniline(PANI)aerogels with excellent electromagnetic interference shielding,flame retardancy,and thermal insulation *** process involved freeze-drying of electrospun CNFs and PANI nanoparticles followed by in situ growth PANI to coat the CNFs,creating the core-shell structured CNFs/PANI composite fiber and its hybrid aerogels(CP-3@PANI).The interaction between PANI and aniline(ANI)provides attachment sites,allowing additional ANI adsorption into the aerogel for in situ *** results in PANI uniformly covering the surface of the CNFs,creating a core-shell composite fiber with a flexible CNF core and PANI *** process enhances the utilization rate of the ANI monomer and increases the PANI content loaded onto the ***,effective connections are established between the CNFs,forming a stable,conductive three-dimensional network *** prepared CP-3@PANI aerogels exhibit excellent EMI shielding efficiency(SE)of 85.4 dB and specific EMI SE(SE d^(-1))of 791.2 dB cm^(3)g^(-1)in the *** to the synergistic flame-retardant effect of CNFs,PANI,and the dopant(phytic acid),the CP-3@PANI aerogels demonstrate outstanding flame-retardant and thermal insulation properties,with a peak heat release rate(PHRR)as low as 7.8 W g^(-1)and a total heat release of only 0.58 kJ g^(-1).This study provides an effective strategy for preparing multifunctional integrated EMI shielding materials.

关键词： CNFs/PANI hybrid aerogels EMI shielding Flame retardancy Thermal insulation

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Hierarchical On-Surface Synthesis of Two-Dimensional Networks via Multipoint S···N and S···H Bonding

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CCS Chemistry 2025年第1期7卷 170-179页

作者： Chen-Hui Shu Li-Xia Kang Shan-shan Wang Yan He Ruo-Xi Zhang Xuelei Su Ping Yu Xingguang Li Pei-Nian Liu Shanghai Key Laboratory of Functional Materials Chemistry Key Laboratory for Advanced MaterialsState Key Laboratory of Chemical EngineeringSchool of Chemistry and Molecular EngineeringEast China University of Science&TechnologyShanghai 200237 Center for Topological Functional Materials Henan Key Laboratory of Photovoltaic MaterialsHenan UniversityKaifeng 475004 School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210 State Key Laboratory of Natural Medicines School of PharmacyChina Pharmaceutical UniversityNanjing 210009

Although electrostatic bonding between chalcogen(Ch)atoms(O,S,Se,and Te)and nitrogen(N)has emerged as a powerful driving force in the fabrication of supramolecular structures;this noncovalent bond has not yet been used to link polymers to form *** this study,we took advantage of additive enthalpy in forming multipoint noncovalent bonds to construct a two-dimensional(2D)network via the hierarchical on-surface synthesis of linear polymer chains,followed by multipoint S···N and S···H *** 4,7-dibromobenzo[c][1,2,5]thiadiazole was used,only short oligomers with embedded bromine atoms and cross-linked byproducts were formed on Ag(111)or Au(111)surfaces after multiple annealing procedures,and no 2D network was *** changing the precursor to a similar iodinesubstituted molecule,long linear polymers were generated and assembled with iodine atoms on Au(111)after annealing at 523 *** annealing at 603 K,iodine atoms were desorbed and polymer chains were assembled via multipoint noncovalent *** 2D network remained intact after annealing at 653 K,demonstrating its high *** multipoint noncovalent bonds were investigated by the combination of scanning tunneling microscopy,noncontact atomic force microscopy,and density functional theory calculations,which revealed that S···N and S···H bonding were the driving forces to construct thermostable and orderly 2D networks.

关键词： two-dimensional networks surfaces chalcogen atoms multipoint noncovalent bonds scanning tunneling microscopy

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