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Large-area growth of synaptic heterostructure arrays for integrated neuromorphic visual perception chips

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Chip 2024年第2期3卷 88-95页

作者： Yao Deng Shenghong Liu Manshi Li Na Zhang Yiming Feng Junbo Han Yury Kapitonov Yuan Li tianyou zhai State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Wuhan National High Magnetic Field Centre Department of PhysicsHuazhong University of Science and TechnologyWuhan 430074China Department of Radiology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Department of Photonics Saint Petersburg State UniversitySaint Petersburg 199034Russia Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518057China

Two-dimensional metal chalcogenides have garnered significant attention as promising candidates for novel neuromorphic synaptic devices due to their exceptional structural and optoelectronic ***,achieving large-scale integration and practical applications of synaptic chips has proven to be challenging due to significant hurdles in materials preparation and the absence of effective nanofabrication *** a recent breakthrough,we introduced a revolutionary allopatric defect-modulated Fe_(7)S_(8)@MoS_(2)synaptic heterostructure,which demonstrated remarkable optoelectronic synaptic response *** upon this achievement,our current study takes a step further by presenting a sulfurization-seeding synergetic growth strategy,enabling the large-scale and arrayed preparation of Fe_(7)S_(8)@MoS_(2)***,a three-dimensional vertical integration technique was developed for the fabrication of arrayed optoelectronic synaptic ***,we have successfully simulated the visual persistence function of the human eye with the adoption of the arrayed *** synaptic devices exhibit a remarkable ability to replicate the preprocessing functions of the human visual system,resulting in significantly improved noise reduction and image recognition *** study might mark an important milestone in advancing the field of optoelectronic synaptic devices,which significantly prompts the development of mature integrated visual perception chips.

关键词： Two-dimensional(2D) Metal chalcogenides Heterostructures Optoelectronic synapse Artificial vision

纤维素纳米片辅助的高导电厚电极的成膜工艺研究

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Science China Materials 2024年第2期67卷 672-679页

作者：杜治辰王汉伟符金洲翟春孙庆丰翟天佑李会巧 State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074China School of Engineering Zhejiang A&F UniversityHangzhou 311300China School of Materials Engineering Changshu Institute of TechnologyChangshu 215500China Shenzhen Research Institute of Huazhong University of Science and Technology Shenzhen 518063China

厚电极技术能在不改变电池内部物质/组分/系统配置的情况下,有效提高电池能量密度,因此备受业界关注.然而,缓慢的电荷转移动力学和较差的机械稳定性,阻碍了其实际应用.在此,我们提出了一种由纤维素纳米片辅助的湿法制膜工艺实现了高导... 详细信息

厚电极技术能在不改变电池内部物质/组分/系统配置的情况下,有效提高电池能量密度,因此备受业界关注.然而,缓慢的电荷转移动力学和较差的机械稳定性,阻碍了其实际应用.在此,我们提出了一种由纤维素纳米片辅助的湿法制膜工艺实现了高导电、高负载厚电极的制备.二维结构纤维素纳米片的高表面积、丰富的官能团和优异的机械性能等独特的性质可以促使电极中的导电剂均匀分布,从而在电极内部构建一个三维连续的快速导电网络,同时纤维素片的存在赋予电极良好的力学性能,厚度提升到300μm而不开裂.以此制得的LiCoO_(2)厚电极在50 mg cm-2的高质量负载下循环,可以实现比干电极高6倍的容量保持率.

关键词： lithium-ion batteries thick electrode nanosheet cellulose solution process

超高选择性CO_(2)光还原为乙醇的CuNi异核双原子催化剂的精准设计

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Chinese Journal of Catalysis 2024年第4期59卷 126-136页

作者：崔恩田鲁玉莲江吉周 Arramel 王定胜翟天佑盐城工学院江苏省新型环保重点实验室江苏盐城224051 武汉工程大学环境生态与生物工程学院湖北新型催化材料工程研究中心教育部磷资源开发利用工程研究中心教育部绿色化工过程重点实验室湖北武汉430205 清华大学化学系北京100084 华中科技大学材料科学与工程学院材料加工与模具技术国家重点实验室湖北武汉430074 印尼纳米中心印尼万丹

利用光催化还原技术将CO_(2)定向转化为乙醇(CO_(2)-乙醇)是解决日益严重的环境污染和能源危机的理想途径之一.然而,CO_(2)分子的高化学惰性以及C-C耦合反应的高化学能垒导致目前CO_(2)-乙醇转化反应的产率和选择性较低.因此,设计构建... 详细信息

利用光催化还原技术将CO_(2)定向转化为乙醇(CO_(2)-乙醇)是解决日益严重的环境污染和能源危机的理想途径之一.然而,CO_(2)分子的高化学惰性以及C-C耦合反应的高化学能垒导致目前CO_(2)-乙醇转化反应的产率和选择性较低.因此,设计构建能够快速活化CO_(2)分子并同时促进C-C耦合的光催化材料具有重要研究意义.尽管已有研究表明,Cu+物种在促进C-C耦合方面具有一定优势,但其在催化反应过程中的不稳定性限制了其实际应用.基于上述认识,本文通过理论模拟预测发现,相比于Cu单原子,CuNi异核双原子(CuNi HDAs)不仅在CO_(2)活化及C-C耦合方面更具优势,而且能够有效锚定并固化Cu+物种.因此,本文设计了一种三步合成策略,精准地将Cu单原子锚定在(Ni,Zr)-UiO-66-NH2材料的Ni位上,合成了以CuNi HDAs为活性位点的Cu-(Ni,Zr)-UiO-66-NH2光催化材料.在可见光照射下,Cu-(Ni,Zr)-UiO-66-NH2表现出较好的催化CO_(2)-乙醇转化活性,其乙醇的产率和选择性分别达到~3218μmol·gCu^(-1)·h^(-1)和97.3%.光谱分析和密度泛函理论计算结果表明,Cu-(Ni,Zr)-UiO-66-NH2材料较好的光催化性能来源于CuNi HDAs特殊的电子结构.首先,CuNi HDAs通过CuNi-O界面化学键与吸光组分(Ni,Zr)-UiO-66-NH2相连,利用界面Cu-Ni-O键作为快速电子传输通道,CuNi HDAs能够富集到足够的光生电子用于涉及12电子的CO_(2)-乙醇转化反应,使得乙醇产率大幅提升.其次,Cu,Ni和O三种原子由于电子亲核能的差异,导致CuNi HDAs的电子分布呈现不对称性.这种不对称的电子结构能有效诱导CO_(2)分子的极化,打破其结构的对称性,从而显著降低CO_(2)分子的活化能.再次,相比于Cu单原子,CuNi HDAs对*CO中间体的吸附能力更强,这不仅增强了活性位点表面*CO中间体的覆盖度,还抑制CO的生成,为C-C耦合创造了充分条件.最后,由于Cu-Ni双活性位电子密度的差异,CuNi HDAs表面的C-C耦合反应势能较低,有利于*OCCHO中间体的快速生成,从而使乙醇产物的选择性大幅提升.综上,本文以理论计算模拟为指导,以UiO-66-NH2材料为基底,成功设计并制备了一种具有不对称电子结构的CuNi HDAs光催化材料,实现了高选择性CO_(2)光还原为乙醇.研究表明,CuNi HDAs的不对称结构在促进分子活化和降低C-C耦合反应能垒中起关键作用,同时促进了光生电子在CuNi HDAs活性位的富集.本文的研究结果为在原子尺度上设计并合成高性能的CO_(2)还原光催化剂提供了实验和理论参考.

关键词： CuNi异核双原子光催化 CO_(2)-乙醇转化不对称电子分配电子富集

2D Cadmium Chalcogenides for Optoelectronics

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Chemical Research in Chinese Universities 2020年第4期36卷 493-503页

作者： JIN Bao zhai tianyou State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074P.R.China

Two-dimensional(2D)cadmium chalcogenides ha ve triggered worldwide interests due to their unique me rits in both structure and physical properties,including thickness-dependent bandgaps,narrow emission line widths high intrinsic absorption coefficient and large absorption cross sections,etc..rendering their great potential for next-generation electronics and optoelectronics *** this article,the progress of 2D cadmium chalcogenides in he past few vears is comprehensivelv *** first discussed several synthetic strategies for various 2D cad mium ***,their optoelectronic applications in photodetectors,lasers,LEDs,and piezoelectric de-vices are summarized and commented in ***,a brief conclusion of the article and the future prospects of the 2D cadmium chalcogenides are provided。

关键词： 2D cadiniimi chalcogenide Synthesis Optoelectronic device Photodetector

Wafer-scale vertical van der Waals heterostructures

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InfoMat 2021年第1期3卷 3-21页

作者： Lixin Liu tianyou zhai State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanP.R.China

Wafer-scale van der Waals heterostructures(vdWHs),benefitting from the rich diversity in materials available and stacking geometry,precise controllability in devices structure and performance,and unprecedented potential in practical application,have attracted considerable attention in the field of twodimensional(2D)*** article reviews the state-of-the-art research activities that focus on wafer-scale vdWHs and their(opto)electronic *** begin with the preparation strategies of vdWHs with wafer size and illustrate them from four key aspects,that is,mechanical-assembly stack,successive deposition,synchronous evolution,and seeded *** discuss the fundamental principle,underlying mechanism,advantages,and disadvantages for each *** will then review the applications of large-area vdWHs based devices in electronic,optoelectronic and flexible devices field,unveiling their promising potential for practical ***,we will demonstrate the challenges they face and provide some viable solutions on waferscale heterostructure synthesis and device fabrication.

关键词： 2D materials optoelectronic devices van der Waals heterostructures wafer-scale

Overcome Debye Length Limitations for Biomolecule Sensing Based on Field Effective Transistors

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Chinese Journal of Chemistry 2021年第4期39卷 999-1008页

作者： Zhi Zheng Hongyuan Zhang tianyou zhai Fan Xia Engineering Research Center of Nano-Geomaterials of Ministry of Education Faculty of Materials Science and ChemistryChina University of GeosciencesWuhanHubei430074 China State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanHubei 430074Chino

Biosensors based on field effective transistor(FET)have aroused tremendous attention in the past few years owning to their huge application in drug discovery,disease diagnosis and environmental *** FET biosensors possess small volume,high sensitivity at ultra-low concentration,considerable mechanical strength,as well as excellent stability in solution,which plays a vital role in the point of care testing(POCT)*** advances have summarized some progress involved in the improvement of morphology and structure of channel materials,the functionalization of organic molecule,the influence of device operation and sensing environment on the detecting ***,for FET biosensors,the charge screening phenomena were inevitable in the solution,which seriously degrade the device *** this article,we summarize recent advances to overcome debye length limitations for biomolecule sensing based on *** will firstly describe the charge screening mechanism,then focous on the strategy to overcome charge screening,including synthesizing special channel materials with crumpled morphology,designing aptamer binding mode,and modulating device ***,we discuss the major challenges and perspectives about overcoming debye length limitations of FET *** summaries provide further insights to realize real-time,lable-free,high-sensitivity FET sensors for medical healthcare.

关键词： Debye length Interactions Field effective transistors Biosensors Biomolecule

Lead-free perovskites for X-ray detecting

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Science Bulletin 2017年第22期62卷 1491-1493页

作者： Fuwei Zhuge Peng Luo tianyou zhai School of Materials Science and En~neering Huazhong University of Sdence and Technology Wuhan 430074 China

X-ray detection is of great importance for computed tomography scanning,security inspection,non-destructive testing of industrial products and other detection applications[1,2].Due to the potential cancer risk caused by X-ray inspection,there is always room to achieve X-ray detectors with even better sensitivity and detection *** are two available approaches detecting X-rays,the first is indirect conversion using scintillators to convert X-ray photons into light and then a photodiode to

关键词： Lead-free perovskites for X-ray detecting Cs CdZnTe

Vapor-Phase Precise-Synthesis of 2D Inorganic Materials for Optoelectronics

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Chinese Journal of Chemistry 2023年第7期41卷 825-834页

作者： Xing Zhou Fuwei Zhuge Han Wang tianyou zhai State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Sciences and EngineeringHuazhong University of Science and TechnologyWuhanHubei430074 China

Comprehensive Summary 2D materials have attracted intensive attention due to their unique electrical and optical properties associated with their strictly defined low *** provide a wide range of basic building blocks for future electronics and *** chemical vapor deposition(CVD)has been proposed to be efficient to realize the controllable thickness,scalable size,which are necessary for both industrial applications and fundamental ***,we share our research works to realize the controllable growth of 2D *** found that stable growth microenvironment can regulate the growth of 2D ***,we developed near-steady source supply,space-confined,and additive-assisted passivated growth methods to solve the problem of unstable growth environment caused by uneven source and mass ***,we developed several strategies to precisely control the parity,separation,and transport of the carriers in 2D materials including fabricating defect-free interface via van der Waals dielectrics,modulating the parity of carriers via ferroelectric-field,and the separation of carriers via band *** future development,we highlight the opportunities and challenges inthis field.

关键词： 2D materials Heterostructures Chemical vapor deposition Photoelectric performances Nanostructures photodetectors

Chemical-vapor-deposition-grown 2D transition metal dichalcogenides:A generalist model for engineering electrocatalytic hydrogen evolution

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Nano Research 2023年第1期16卷 101-116页

作者： Yang Zhao Jiazhao Huang Jianqiang Chen Youwen Liu tianyou zhai State Key Laboratory of Materials Processing and Die&Mould Technology and School of Materials Science and EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074China

Two-dimensional(2D)transition metal dichalcogenides(TMDs)have proved to possess exceptional catalytic performance for hydrogen evolution and are considered to be an appropriate substitute for commercial Pt-based ***,chemical vapor deposition(CVD)is an extremely important technique for acquiring controllable and high-purity TMDs for electrocatalysis and modern electronic ***,researchers have made significant achievements in synthesizing TMDs used for electrocatalytic hydrogen evolution by CVD ranging from dynamic mechanism exploration to performance *** this review,we present the recent progress based on electrocatalytic hydrogen evolution implemented by CVDgrowth TMDs nanosheets and unveil the structural–activity ***,in synthesis,diverse factors covering precursor,substrate,temperature settings,and atmosphere will affect the quality and surface morphology of ***,we present the current research status of the CVD-grown 2D TMDs for engineering electrocatalytic hydrogen evolution,including intrinsic performance exploring,morphology engineering,composition adjusting,phase engineering,and vertically-oriented structure ***,the future prospects and challenges of CVD in 2D TMDs electrocatalysis are provided.

关键词： chemical vapor deposition two-dimensional(2D)transition metal dichalcogenides electrochemistry hydrogen evolution on-chip electrocatalysis