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Nanomembrane folding origami: Geometry control and micro-machine applications

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Progress in Natural Science:Materials international 2021年第6期31卷 865-871页

作者： Yang Zong Xinyuan Zhang Yue Wu Yang Wang Chang Liu Borui Xu Gaoshan Huang Jizhai Cui Yongfeng Mei Department of Materials Science State Key Laboratory of ASIC and Systems Fudan University international institute for Intelligent nanorobots and nanosystems Fudan University Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception Institute of Optoelectronics Fudan University Yiwu Research institute of Fudan University

Three-dimensional(3D) microstructures have important applications in a wide range of engineering fields. A strategy of nanomembrane folding origami with microdroplet-guided intercalation and strain engineering to construct complex 3D microstructures for micro-machine applications is proposed in the present *** results showed that nanomembranes were released by the microdroplet intercalation and subsequently fold up as creases, or remain flat as facets, depending on the strain design configurations. The 3D geometry can be controlled by the crease design and by an externally applied magnetic field. Moreover, this folding strategy is used to construct magnetic micro-mirror arrays, magnetic micro-robots, and a twin-jet motor platform, showing potential micro-machine applications in optical micro-devices and robotics. This strategy offers a simple,precise, and designable method of folding 3D microstructures for fundamental research and practical applications.

关键词： Folding origami Liquid-triggered delamination Strain engineering Magnetic manipulation Micro-machine

Fabrication and performance of 3C–SiC photocathode materials for water splitting

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Progress in Natural Science:Materials international 2024年第1期34卷 12-25页

作者： Haojie Li Zidong Zhou Xiuhua Cao Zhilan Du Wei Yan Jiawen Li Altaf Mujear Yinfei Shao Jing Chen Xuesong Wang Guohua Gao Yuxin Zhang Yongfeng Mei Zhihao Bao Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology School of Physics Science and Engineering Tongji University College of Materials Science and Engineering Chongqing University Yiwu Research institute of Fudan University Department of Materials Science&State Key Laboratory of Molecular Engineering of Polymers Fudan University Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception Institute of Optoelectronics Fudan University international institute of Intelligent nanorobots and nanosystems Fudan University

Since high-performance catalysts play a vital role in energy conversion efficiency during photocatalytic hydrogen evolution(PHE), they are indispensable for clean energy production and environmental sustainability. Though a lot of semiconductor materials have been developed as catalysts for PHE by water splitting, many of them(e.g.,oxides, sulfides, and phosphides) suffer from low stability and unsuitable energy band structures. In contrast, the energy band structure of cubic silicon carbide(3C–SiC) ideally spans the water redox potential, and its suitable band gap(2.36 eV) can effectively utilize most of the available sunlight. Therefore, 3C–SiC exhibits unique advantages in PHE. In this review, to aid researchers in preparing an appropriate photocatalytic material for hydrogen evolution, a thorough examination of the preparation methods of 3C–SiC is offered. The modification methods of 3C–SiC and their recent advances in enhancing its efficiency of PHE are summarized. They include morphology control, heterostructure construction, doping, and loaded co-catalysts. A deep discussion of the relationship among the photocatalytic effect, its energy band structure, and modification methods of 3C–SiC is presented. Finally, the benefits and drawbacks of various modifications for PHE are emphasized, as is the outlook for future research.

关键词： Cubic silicon carbide Photocatalytic hydrogen evolution Photocatalytic mechanism Preparation methods Improving strategies

ess Enhanced photothermoelectric conversion in selfrolled tellurium photodetector with geometryinduced energy localization

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Light(Science & Applications) 2024年第8期13卷 1545-1556页

作者： Jiayuan Huang Chunyu You Binmin Wu Yunqi Wang Ziyu Zhang Xinyu Zhang Chang Liu Ningge Huang Zhi Zheng Tingqi Wu Suwit Kiravittaya Yongfeng Mei Gaoshan Huang Department of Materials Science&State Key Laboratory of Molecular Engineering of Polymers Fudan UniversityShanghai 200438China Yiwu Research institute of Fudan University Yiwu 322000 ZhejiangChina international institute of Intelligent nanorobots and nanosystems Fudan UniversityShanghai 200438China ShanghaiTech Quantum Device Lab ShanghaiTech UniversityShanghai 200120China Department of Electrical Engineering Faculty of EngineeringChulalongkorn UniversityBangkokThailand Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception Institute of OptoelectronicsFudan UniversityShanghai 200438China

Photodetection has attracted significant attention for information *** the implementation relies primarily on the photonic detectors,they are predominantly constrained by the intrinsic bandgap of active *** the other hand,photothermoelectric(PTE)detectors have garnered substantial research interest for their promising capabilities in broadband detection,owing to the self-driven photovoltages induced by the temperature *** get higher performances,it is crucial to localize light and heat energies for efficient ***,there is limited research on the energy conversion in PTE detectors at micro/nano *** this study,we have achieved a twoorder-of-magnitude enhancement in photovoltage responsivity in the self-rolled tubular tellurium(Te)photodetector with PTE *** illumination,the tubular device demonstrates a maximum photovoltage responsivity of 252.13 VW^(-1)and a large detectivity of 1.48×10^(11)*** disclose the mechanism of the PTE conversion in the tubular structure with the assistance of theoretical *** addition,the device exhibits excellent performances in wide-angle and polarization-dependent *** work presents an approach to remarkably improve the performance of photodetector by concentrating light and corresponding heat generated,and the proposed self-rolled devices thus hold remarkable promises for next-generation on-chip photodetection.

关键词： illumination energy primarily

Recent advances in microsystem approaches for mechanical characterization of soft biological tissues

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Microsystems & Nanoengineering 2022年第4期8卷 1-16页

作者： Enming Song Ya Huang Ningge Huang Yongfeng Mei Xinge Yu John A.Rogers Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception Institute of OptoelectronicsFudan UniversityShanghai 200433China international institute of Intelligent nanorobots and nanosystems Fudan UniversityShanghai 200433China Department of Biomedical Engineering City University of Hong KongHong Kong 999077China Department of Materials Science Fudan UniversityShanghai 200433China Querrey Simpson institute for Bioelectronics Department of Materials Science and EngineeringDepartments of Biomedical EngineeringNeurological SurgeryChemistryMechanical EngineeringElectrical Engineering and Computer ScienceNorthwestern UniversityEvanstonIL 60208USA

Microsystem technologies for evaluating the mechanical properties of soft biological tissues offer various capabilities relevant to medical research and clinical diagnosis of pathophysiologic *** progress includes(1)the development of tissue-compliant designs that provide minimally invasive interfaces to soft,dynamic biological surfaces and(2)improvements in options for assessments of elastic moduli at spatial scales from cellular resolution to macroscopic areas and across depths from superficial levels to deep *** review summarizes a collection of these technologies,with an emphasis on operational principles,fabrication methods,device designs,integration schemes,and measurement *** core content begins with a discussion of platforms ranging from penetrating filamentary probes and shape-conformal sheets to stretchable arrays of ultrasonic *** sections examine different techniques based on planar microelectromechanical system(MEMS)approaches for biocompatible interfaces to targets that span scales from individual cells to *** highlighted example includes miniature electromechanical devices that allow depth profiling of soft tissue biomechanics across a wide range of *** clinical utility of these technologies is in monitoring changes in tissue properties and in targeting/identifying diseased tissues with distinct variations in *** results suggest future opportunities in engineered systems for biomechanical sensing,spanning a broad scope of applications with relevance to many aspects of health care and biology research.

关键词： advances identifying utility

Foldable-circuit-enabled miniaturized multifunctional sensor for smart digital dust

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Chip 2022年第4期1卷 82-89页

作者： Chun-Yu You Bo-Fan Hu Bo-Rui Xu Zi-Yu Zhang Bin-Min Wu Gao-Shan Huang En-Ming Song Yong-Feng Mei Department of Materials Science&State Key Laboratory of Molecular Engi-neering of Polymers Fudan UniversityShanghai 200438People’s Republic of China Shanghai Frontiers Science Research Base of Intelligent Optoelec-tronics and Perception Institute of OptoelectronicsFudan UniversityShang-hai 200438People’s Republic of China international institute of Intelligent nanorobots and nanosystems Fudan UniversityShanghai 200438People’s Republic of China Yiwu Research institute of Fudan University Yiwu 322000ZhejiangPeople’s Republic of China

Smart dust,which refers to miniaturized,multifunctional sensor motes,would open up data acquisition opportunities for Internet of Things(IoT)and Environmental protection ***,critical obstacles remain challenging in the integration of high-density sensors,further miniaturization of device platforms,and reduction of ***,we demonstrate the concept of smart digital dust to address these problems,the results of which combine the benefit of(i)maturity of complementary metal-oxide semiconductor(CMOS)processing approaches and(ii)unique form factors of emerging flex-ible *** a prototype for smart digital dust,we present a millimeter-scale multifunctional optoelectronic sensor platform con-sisting of high-performance optoelectronic sensor cores and commer-cially available integrated-circuit *** smart material-assisted optoelectronic sensing mechanism enables real-time,high-sensitivity hydrogen,temperature,and relative humidity(RH)sens-ing based on a single chip with ultralow power *** a microsystem presented here introduces a viable solution to the multi-functional sensing need of IoT and could serve as a building block for the rapidly evolving future framework of smart dust.

关键词： Smart dust Flexible electronics Nanomembrane devices Multifunctional sensors

Hierarchically nanostructured nitrogen-doped porous carbon multilayer confining Fe particles for high performance hydrogen evolution

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Journal of Materiomics 2023年第6期9卷 1113-1121页

作者： Ying Wang Li Jin Shiyang Hua Zhe Zhao Zhijia Xiao Chunyan Qu Jiayuan Huang Gaoshan Huang Xinyi Ke Zihan Lu Ji Tan Xuanyong Liu Yongfeng Mei College of Mathematics and Physics Shanghai University of Electric PowerShanghai200090China Department of Materials Science&State Key Laboratory of Molecular Engineering of Polymers Fudan UniversityShanghai200438China Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception Institute of OptoelectronicsFudan UniversityShanghai200438China international institute of Intelligent nanorobots and nanosystems Fudan UniversityShanghai200438China Yiwu Research institute of Fudan University Yiwu322000ZhejiangChina State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China Wuhan institute of Marine Electric Propulsion Wuhan430064China

Precise assembly of active component with sophisticated confinement in electrocatalyst are promising to increase the active site exposure for enhanced hydrogen evolution reaction(HER).Here,PCN-333 films with mesopores are firstly assembled on titanium carbide MXene with the assistance of atomic layer deposited oxide *** the whereafter pyrolysis process,the composite is converted to Ndoped porous carbon multi-layer containing Fe *** strong confinement of Fe active particle in carbon as well as great contact between metal and carbon effectively enhance active site ***,this multi-layer porous structure provides high specific surface area and plentiful mesopores for electrolyte *** to the structural advantage,the composite can be well functioned in both acid and alkaline electrolytes with excellent HER performance,e.g.,low overpotential/Tafel *** present work may have great potential in developing high efficiency transition-metal based electrocatalysts.

关键词： Hierarchical nanostructure Metal organic framework MXene Atomic layer deposition Hydrogen evolution reaction

Biodegradable germanium electronics for integrated biosensing of physiological signals

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npj Flexible Electronics 2022年第1期6卷 632-641页

作者： Haonan Zhao Zhongying Xue Xiaozhong Wu Zhihuan Wei Qiuyu Guo Miao Xu Chunyan Qu Chunyu You Yongfeng Mei Miao Zhang Zengfeng Di Qinglei Guo School of Microelectronics Center of NanoelectronicsShandong University250100 JinanP.R.China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences200050 ShanghaiP.R.China Department of Hematology Qilu HospitalCheeloo College of MedicineShandong University250100 JinanP.R.China Department of Materials Science International Institute for Intelligent Nanorobots and NanosystemsFudan University200433 ShanghaiP.R.China State Key Laboratory of ASIC and Systems Fudan University200433 ShanghaiP.R.China institute of Optoelectronics Yiwu Research InstituteFudan University200433 ShanghaiP.R.China

Transient electronics that can disappear or degrade via physical disintegration or chemical reaction over a pre-defined operational period provide essential for their applications in implantable bioelectronics due to the complete elimination of the second surgical ***,the dissolution of commonly utilized bioresorbable materials often accompanies hydrogen production,which may cause potential or irreparable harm to the human *** paper introduces germanium nanomembrane-based bioresorbable electronic sensors,where the chemical dissolution of all utilized materials in biofluidic theoretically have no gaseous *** particular,the superior electronic transport of germanium enables the demonstrated bioresorbable electronic sensors to successfully distinguish the crosstalk of different physiological signals,such as temperature and strain,suggesting the significant prospect for the construction of dual or multi-parameter *** studies reveal the gauge factor and temperature coefficient of resistance comparable to otherwise similar devices with gaseous products during their dissolution.

关键词： companies utilized otherwise