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Science Bulletin 2018年第10期63卷 599-600页

作者： Xiong wen(david)Lou School of Chemical and Biomedical Engineering. Nanyang Technological University Singapore 637459 Singapore

Solar water splitting for hydrogen generation using semiconductor photocatalysts is a promising approach for developing renewable energy sources[1,2].To enhance the performance of semiconductor photocatalysts,cocatalytic materials are normally utilized to accelerate surface redox *** most cases,cocatalysts are randomly decorated on the surface of photocatalysts,

关键词：氧化还原作用半导体光催化剂空间异质氢表面水

Embedding CoS2 nanoparticles in N-doped carbon nanotube hollow frameworks for enhanced lithium storage properties

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Nano Research 2017年第12期10卷 4298-4304页

作者： Jintao Zhang Le Yu Xiong wen (david) Lou School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive Singapore 637459 Singapore

The construction of metal sulfides-carbon nanocomposites with a hollow structure is highly attractive for various energy storage and conversion technologies. Herein, we report a facile two-step method for preparing a nanocomposite with CoS2 nanoparticles in N-doped carbon nanotube hollow frameworks （NCNTFs）. Starting from zeolitic imidazolate framework-67 （ZIF-67） particles, in situ reduced metallic cobalt nanocrystals expedite the formation of the hierarchical hollow frameworks from staggered carbon nanotubes via a carbonization process. After a follow-up sulfidation reaction with sulfur powder, the embedded cobalt crystals are transformed into CoS2 nanoparticles. Benefitting from the robust hollow frameworks made of N-doped carbon nanotubes and highly active CoS2 ultrafine nanoparticles, this advanced nanocomposite shows greatly enhanced lithium storage properties when evaluated as an electrode for lithium-ion batteries. Impressively, the resultant CoS2/NCNTF material delivers a high specific capacity of -937 mAh.g-1 at a current density of 1.0 A-g-1 with a cycle life longer than 160 cycles.

关键词： COS2 carbon nanotube metal-organic framework lithium-ion batteries

Mirrorless MEMS imaging:a nonlinear vibrational approach utilizing aerosol-jetted PZT-actuated fiber MEMS scanner for microscale illumination

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Microsystems & Nanoengineering 2024年第1期10卷 175-192页

作者： Wei-Chih Wang Ming-Yao Li Kuan-Chang Peng Yi-Feng Hsu Benjamin Estroff Pao-Yun Yen david Schipf wen-Jong Wu Department of Power Mechanical Engineering National Tsing Hua UniversityNo.101Section 2Kuang-Fu RoadHsinchuTaiwan 30013China Institute of NanoEngineering and Microsystems National Tsing Hua UniversityNo.101Section 2Kuang-Fu RoadHsinchuTaiwan 30013China Department of Mechanical Engineering University of WashingtonSeattleWA 98195USA Department of Electrical Engineering University of WashingtonSeattleWA 98195USA Department of Engineering Science and Ocean Engineering National Taiwan UniversityTaiwanChina

This study introduces a novel image capture and lighting techniques using a cutting-edge hybrid MEMS scanner system designed for compact microscopic *** scanner comprises a tapered optical fiber waveguide and innovative aerosol-jet printed PZT(lead zirconate titanate)bimorph push-pull actuators on a stainless-steel substrate,effectively addressing issues that are commonly associated with PZT on silicon substrates such as fracture and layer *** leveraging nonlinear vibration,the scanner achieves a spiral scan pattern from a single signal input,in addition to the expected two-dimensional scanning and target illumination from two phase-shifted *** capability is further enhanced by a novel process to taper the optical fiber,which reduces illumination scattering and tunes the fiber to the resonant frequencies of the *** precisely tapered tip enables large fields of view while maintaining independent 2-axis scanning through one-degree-of-freedom *** validation showcases the successful generation of a spiral scan pattern with a 60μm diameter scan area and a 10 Hz frame rate,effectively reconstructing scanned images of 5μm lines,cross patterns(15μm in length with a 5μm gap),and structures of a Psychodidae wing.

关键词： steel fiber scanner

Metal–Organic Framework-Assisted Synthesis of Compact Fe_2O_3 Nanotubes in Co_3O_4 Host with Enhanced Lithium Storage Properties

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Nano-Micro Letters 2018年第3期10卷 70-78页

作者： Song Lin Zhang Bu Yuan Guan Hao Bin Wu Xiong wen david Lou School of Chemical and Biomedical Engineering Nanyang Technological University School of Materials Science and Engineering Zhejiang University

Transition metal oxides are promising candidates for the high-capacity anode material in lithium-ion *** electrochemical performance of transition metal oxides can be improved by constructing suitable composite architectures. Herein, we demonstrate a metal–organic framework(MOF)-assisted strategy for the synthesis of a hierarchical hybrid nanostructure composed of Fe_2O_3 nanotubes assembled in Co_3O_4 host. Starting from MOF composite precursors(Fe-based MOF encapsulated in a Cobased host matrix), a complex structure of Co_3O_4 host and engulfed Fe_2O_3 nanotubes was prepared by a simple annealing treatment in air. By virtue of their structural and compositional features, these hierarchical composite particles reveal enhanced lithium storage properties when employed as anodes for lithium-ion batteries.

关键词： Metal–organic framework(MOF) Hierarchical structures Fe2O3 nanotubes Co3O4 Lithium-ion batteries(LIBs)

Shared genetic architecture highlights the bidirectional association between major depressive disorder and fracture risk

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General Psychiatry 2024年第3期37卷 352-363页

作者： Pianpian Zhao Zhimin Ying Chengda Yuan Haisheng Zhang Ao Dong Jianguo Tao Xiangjiao Yi Mengyuan Yang wen Jin Weiliang Tian david Karasik Geng Tian Houfeng Zheng The Affiliated Hangzhou First People’s Hospital School of MedicineWestlake UniversityHangzhouZhejiangChina Westlake Laboratory of Life Sciences and Biomedicine HangzhouZhejiangChina Diseases&Population(DaP)Geninfo Lab School of Life SciencesWestlake UniversityHangzhouZhejiangChina Institute of Basic Medical Sciences Westlake Institute for Advanced StudyHangzhouZhejiangChina Department of Orthopedic Surgery The Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiangChina Department of Dermatology Hangzhou Hospital of Traditional Chinese MedicineHangzhouZhejiangChina Department of Global Statistics Eli Lilly and CompanyBranchburgNew JerseyUSA Azrieli Faculty of Medicine Bar-Ilan UniversitySafedIsrael Binzhou Medical University YantaiShandongChina

Background There is limited evidence suggesting that osteoporosis might exacerbate depressive symptoms,while more studies demonstrate that depression negatively affects bone density and increases fracture *** To explore the relationship between major depressive disorder(MDD)and fracture *** We conducted a nested case-control analysis(32670 patients with fracture and 397017 individuals without fracture)and a matched cohort analysis(16496 patients with MDD and 435492 individuals without MDD)in the same prospective UK Biobank data ***,we investigated the shared genetic architecture between MDD and fracture with linkage disequilibrium score regression and the MiXeR statistical *** used the conditional/conjunctional false discovery rate approach to identify the specific shared *** calculated the weighted genetic risk score for individuals in the UK Biobank and logistic regression was used to confirm the association observed in the prospective *** We found that MDD was associated with a 14%increase in fracture risk(hazard ratio(HR)1.14,95%CI 1.14 to 1.15,p<0.001)in the nested case-control analysis,while fracture was associated with a 72%increase in MDD risk(HR 1.72,95%CI 1.64 to 1.79,p<0.001)in the matched cohort analysis,suggesting a longitudinal and bidirectional ***,genetic summary data suggested a genetic overlap between MDD and ***,we identified four shared genomic loci,with the top signal(rs7554101)near *** protein encoded by SGIP1 is involved in cannabinoid receptor type 1 *** found that genetically predicted MDD was associated with a higher risk of fracture and vice *** addition,we found that the higher expression level of SGIP1 in the spinal cord and muscle was associated with an increased risk of fracture and *** The genetic pleiotropy between MDD and fracture highlights the bidirectional association observed in the epidemiological *** shared ge

关键词： fracture matched osteoporosis

A Transformer-Assisted Cascade Learning Network for Choroidal Vessel Segmentation

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Journal of Computer Science & Technology 2024年第2期39卷 286-304页

作者：温阳吴依林毕磊石武祯刘潇骁许毓鹏许迅曹文明冯大淦 Guangdong Provincial Key Laboratory of Intelligent Information Processing School of Electronics and Information EngineeringShenzhen UniversityShenzhen 518060China Institute of Translational Medicine Shanghai Jiao Tong UniversityShanghai 200240China Department of Ophthalmology Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China School of Information Technologies The University of SydneySydney 2006Australia

As a highly vascular eye part,the choroid is crucial in various eye disease ***,limited research has focused on the inner structure of the choroid due to the challenges in obtaining sufficient accurate label data,particularly for the choroidal ***,the existing direct choroidal vessel segmentation methods for the intelligent diagnosis of vascular assisted ophthalmic diseases are still unsatisfactory due to noise data,while the synergistic segmentation methods compromise vessel segmentation performance for the choroid layer segmentation *** cascaded structures grapple with error propagation during *** address these challenges,we propose a cascade learning segmentation method for the inner vessel structures of the choroid in this ***,we propose TransformerAssisted Cascade Learning Network(TACLNet)for choroidal vessel segmentation,which comprises a two-stage training strategy:pre-training for choroid layer segmentation and joint training for choroid layer and choroidal vessel *** also enhance the skip connection structures by introducing a multi-scale subtraction connection module designated as MSC,capturing differential and detailed information ***,we implement an auxiliary Transformer branch named ATB to integrate global features into the segmentation *** results exhibit that our method achieves the state-of-the-art performance for choroidal vessel ***,we further validate the significant superiority of the proposed method for retinal fluid segmentation in optical coherence tomography(OCT)scans on a publicly available *** these fully prove that our TACLNet contributes to the advancement of choroidal vessel segmentation and is of great significance for ophthalmic research and clinical application.

关键词： choroidal vessel segmentation optical coherence tomography(OCT) Transformer-assisted cascade learning retinal fluid segmentation multi-scale feature extraction

Synthesis of Nanostructured Metal Oxide Materials and Their Applications in Li-ion Batteries and Supercapacitors

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Synthesis of Nanostructured Metal Oxide Materials and Their ...

中国化学会第29届学术年会

作者： Xiong wen（david） Lou School of Chemical and Biomedical Engineering Nanyang Technological University

Metal oxides are suggested as promising electrode materials for lithium-ion batteries（LIBs） and supercapacitors. We have employed hydrothermal/solvothermal methods to synthesize a wide range of new metal oxide based nanomaterials, and investigated their potential applications as electrode materials for LIBs and supercapacitors. In this talk, I will briefly discuss three types of metal oxides based on three different lithium storage mechanisms.（i） Specifically, we have synthesized hollow SnO2 nanostructures by both templating and template-free methods, and further engineered them into SnO2-carbon composite hollow structures to achieve significantly improved lithium storage properties.（ii） We also try to improve the lithium insertion properties of TiO2 by engineering the crystal facets in view of the fact that lithium insertion in TiO2 is anisotropic. In particular, anatase TiO2 in the form of nanosheet with exposed（001） facets is an ideal host structure for this purpose.（iii） We have also demonstrated the concept for conversion reaction compounds（e.g., Fe2O3） showing that the cycling performance can be improved by creating a porous/hollow structure. Lastly, I will briefly talk about some of our most recent works about mixed metal oxide materials for LIBs and supercapacitors.

关键词： Metal Oxide Hollow Structures Lithium ion batteries Supercapacitors

Synthesis of Hollow Nanostructures for Electrochemical Energy Storage

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Synthesis of Hollow Nanostructures for Electrochemical Energ...

第31届全国化学与物理电源学术年会

作者： Xiong wen(david)Lou School of Chemical and Biomedical Engineering Nanyang Technological University

Hollow nanostructures are promising as electrode materials for electrochemical energy storage,including lithium-ion batteries,supercapacitors and lithium-sulfur *** have employed hydrothermal/solvothermal methods to synthesize hollow nanostructures of different metal oxide/sulfide materials,and investigated their electrochemical properties in lithium-ion batteries and *** this talk,I will briefly discuss the synthesis and electrochemical properties of hollow nanostructures of metal oxides/*** have been able to synthesize different hollow nanostructures of many binary metal oxides such as SnO,FeO and FeO,and more recently mixed transition metal oxides/sulfides such as NiCoO and *** also designed some hollow structures of carbon and carbon-metal oxide for lithium sulfur batteries.

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Synthesis of Hollow Nanostructues for Lithium-ion Batteries

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Synthesis of Hollow Nanostructues for Lithium-ion Batteries

中国化学会第29届学术年会

作者： Xiong wen（david）Lou School of Chemical and Biomedical Engineering Nanyang Technological University

Hollow nanostructures are promising as electrode materials for lithium-ion batteries（LIBs）. We have employed hydrothermal/solvothermal methods to synthesize hollow nanostructures of different materials, and investigated their lithium storage properties. In this talk, I will briefly discuss hollow nanostructures of metal oxides. We have been able to synthesize different hollow nanostructures of many binary metal oxides such as SnO2, Fe2O3 and Fe3O4, and more recently mixed metal oxides. I will also talk about integration of oxide and different carbon materials to further improve their lithium storage properties.

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二硫化钼纳米片复合材料的制备及其锂离子存储性能

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二硫化钼纳米片复合材料的制备及其锂离子存储性能

中国化学会第28届学术年会

作者：张东阳丁书江 Xiong wen(david)Lou 西安交通大学理学院应用化学系 School of Chemical and Biomedical Engineering Nanyang Technological University

＜正＞在聚苯乙烯微球的辅助下,合成了聚苯乙烯微球和二硫化钼（MoS2）纳米片微球的混合物,在惰性气体保护下,经过高温煅烧的过程,聚苯乙烯微球被分解了,只得到由MoS2纳米片构成的微球。我们对这些

关键词：二硫化钼纳米片微球碳纳米管锂离子电池