检索结果-南通市图书馆

Expanding the Chemistry of Perylene:Bottom-up Synthetic Approach towards Graphene Nano-ribbons

在线全文

学校读者我要写书评

暂无评论

Expanding the Chemistry of Perylene:Bottom-up Synthetic Appr...

酰胺与酰亚胺类n型有机半导体材料的研究进展

全国第八届有机固体电子过程暨华人有机光电功能材料学术讨论会

作者： Yan Li,Hualei Qian,yonggang zhen,Zhaohui Wang~* (Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences, Zhongguancun North First Street No.2,Beijing 100190)

Graphene nanoribbons(GNRs),for which the width of the sheet is confined to a finite size while the length is considered infinitely long,have attracted considerable interest due to high potentiality in GNRs-based nanoelectronics. The bottom-up organic synthetic approach is believed to be the most promising way to construct well-de-

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

化学学报 2022年第12期80卷 1600-1617页

作者：李善武朱陈宇杰罗尹豪张亚茹滕汉明王宗瑞甄永刚北京化工大学有机无机复合材料国家重点实验室北京100029 华中科技大学武汉光电国家研究中心武汉430074 华南理工大学发光材料与器件国家重点实验室广州510640

有机半导体材料具有来源丰富、化学结构可裁剪、柔韧性较高、器件制备温度低和塑料衬底兼容性好等优点,极大地拓展了电子器件的功能与应用.然而,电子传输型(n型)有机半导体在分子多样性、载流子迁移率和空气稳定性方面远远落后于空穴传... 详细信息

有机半导体材料具有来源丰富、化学结构可裁剪、柔韧性较高、器件制备温度低和塑料衬底兼容性好等优点,极大地拓展了电子器件的功能与应用.然而,电子传输型(n型)有机半导体在分子多样性、载流子迁移率和空气稳定性方面远远落后于空穴传输型(p型)半导体,从而阻碍了双极晶体管、p-n结和有机互补电路的发展.酰胺或酰亚胺功能化能显著提高有机材料的电子亲和势,是构建高性能n型有机半导体的重要策略.本综述总结了近年来萘二酰亚胺类、苝二酰亚胺类、吡咯并吡咯二酮类、异靛蓝类和其他酰胺/酰亚胺类小分子和聚合物n型有机半导体材料的研究进展,从分子设计角度出发,深入讨论了分子结构如何改变分子前线轨道能级、分子间相互作用力、聚集态结构、器件稳定性和电学性能,最后对其未来的发展方向和面临的挑战进行了展望.

关键词： n型有机半导体酰胺酰亚胺分子设计有机场效应晶体管

基于6,13-双氰基并五苯一维滑移堆积微米带状晶体的双极性电荷传输

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2023年第6期66卷 2429-2435页

作者：王宗瑞胡洋谢玉洁郄凤翔郭俊峰张磊史春风 Florian Glöcklhofer 甄永刚 Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Organic-Inorganic CompositesBeijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Catalytic Materials and Reaction Engineering Research Institute of Petroleum ProcessingSINOPECBeijing 100083China State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640China Department of Chemistry and Centre for Processable Electronics Imperial College LondonLondonW120BZUnited Kingdom State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen UniversityGuangzhou 510275China

基于有机π共轭体系的一维自组装微纳米材料(1D-MNMs)具有较少的散射电荷传输、尺寸适中、易于制备等优点,可以方便地构筑集成微电路.虽然基于p沟道或n沟道有机半导体的一维自组装微纳米材料已经取得了巨大的进展,但遗憾的是,迄今为止,... 详细信息

基于有机π共轭体系的一维自组装微纳米材料(1D-MNMs)具有较少的散射电荷传输、尺寸适中、易于制备等优点,可以方便地构筑集成微电路.虽然基于p沟道或n沟道有机半导体的一维自组装微纳米材料已经取得了巨大的进展,但遗憾的是,迄今为止,基于双极性有机半导体的一维自组装微纳米材料还非常缺乏.本文利用物理气相传输法,制备了基于6,13-双氰基并五苯(DCP)的一维滑移堆积新型自组装微纳米材料,其表现出良好的双极性电荷传输特性,电子和空穴迁移率分别达到0.34和0.38 cm2 V^(-1)s^(-1),是一维自组装微纳米材料中最好的双极性电荷传输特性之一.此外,基于双极性DCP的一维自组装微纳米材料构建了互补型反相器,增益可达7,表明其在有机逻辑电路中具有潜在的应用前景.

关键词：微纳米材料有机半导体电荷传输自组装双极性逻辑电路空穴迁移率并五苯

A Denoiser for Correlated Noise Channel Decoding: Gated-Neural Network

在线全文

学校读者我要写书评

暂无评论

China Communications 2024年第2期21卷 122-128页

作者： Xiao Li Ling Zhao zhen Dai yonggang Lei School of Electronic and Information Engineering Beihang UniversityBeijing 100191China Beijing Institute of Tracking and Telecommunications Technology BITTT

This letter proposes a sliced-gated-convolutional neural network with belief propagation(SGCNN-BP) architecture for decoding long codes under correlated noise. The basic idea of SGCNNBP is using Neural Networks(NN) to transform the correlated noise into white noise, setting up the optimal condition for a standard BP decoder that takes the output from the NN. A gate-controlled neuron is used to regulate information flow and an optional operation—slicing is adopted to reduce parameters and lower training complexity. Simulation results show that SGCNN-BP has much better performance(with the largest gap being 5dB improvement) than a single BP decoder and achieves a nearly 1dB improvement compared to Fully Convolutional Networks(FCN).

关键词： belief propagation channel decoding correlated noise neural network

Late Cretaceous K-rich rhyolitic crystal tuffs from the Chuduoqu area in Eastern Qiangtang subterrane:evidence for crustal thickening of the central Tibetan Plateau prior to India–Asia collision

在线全文

学校读者我要写书评

暂无评论

Acta Geochimica 2022年第1期41卷 147-163页

作者： yonggang Sun Bile Li Fengyue Sun Qingfeng Ding Junlin Dong Ye Qian Yujin Li zhen Yao College of Earth Sciences Jilin University2199 Jianshe StreetChangchun 130061China College of Mining Liaoning Technical UniversityFuxin 123000China No.5 Geologic Exploration Institute of Qinghai Province Xining 810003China Key Laboratory of Mineral Resources Evaluation in Northeast Asia Ministry of Land and ResourcesChangchun 130061China

In order to constrain whether the Lhasa–Qiangtang collision contributed to an early crustal thickening of the central Tibetan Plateau prior to the India–Asia collision,we present zircon LA–ICP–MS U–Pb ages,wholerock geochemistry,and zircon Hf isotopic compositions of the newly discovered rhyolitic crystal tuffs from the Chuduoqu area in the eastern Qiangtang subterrane,central *** U–Pb dating suggests that the Chuduoqu rhyolitic crystal tuffs were emplaced at ca.68 *** Chuoduoqu rhyolitic crystal tuffs display high SiO_(2) and K2 O,and low MgO,Cr,and *** with their zircon Hf isotopic data,we suggest that they were derived from partial melting of the juvenile lower crust,and the magma underwent fractional crystallization and limited upper continental crustal assimilation during its evolution prior to *** should be formed in a post-collisional environment related to lithospheric mantle *** Chuduoqu rhyolitic crystal tuffs could provide important constraints on the Late Cretaceous crustal thickening of the central Tibetan Plateau caused by the Lhasa–Qiangtang collision.

关键词： Rhyolitic crystal tuffs Late Cretaceous Crustal thickening Lhasa-Qiangtang collision Central Tibetan Plateau

Ribonucleotide reductase subunit M1 blocks glucose catabolism via phosphorylation of pyruvate kinase M2 in human esophageal squamous cell cancer

在线全文

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第3期11卷 69-71页

作者： Jian Yang Lingxiao Wang Hui Sun zhenxiang Zhao Yanchuan Ma zhen Hu Liqin Zhai yonggang Wang Translational Medicine Research Center Shanxi Medical UniversityTaiyuanShanxi030001China Department of Cell Biology and Genetics Shanxi Medical UniversityTaiyuanShanxi 030001China Key Laboratory of Cellular Physiology of the Ministry of Education Shanxi Medical UniversityTaiyuanShanxi 030001China Department of Colorectal Surgery The Fifth Clinical Medical College of Shanxi Medical UniversityTaiyuanShanxi 030012China Science&Technology Information and Strategy Research Center of Shanxi TaiyuanShanxi 030006China Department of Pathology Shanxi Provincial People's HospitalTaiyuanShanxi 030012China Department of Anatomy College of Basic MedicineShanxi Medical UniversityTaiyuanShanxi 030001China

Esophageal squamous cell cancer(EScC)is one of the malignant tumors with high morbidity and mortality all over the world.^(1) In recent years,combined chemotherapy has gradually been the effective treatment method for EscC ***,it is imperative to explore potential therapeutic targets for the treatment of *** previously reported a high-frequency amplification of pyrimidine metabolic pathway-related genes in EsCC tissues.

关键词： squamous esophageal cancer

The importance of H_(2) in the controlled growth of semiconducting single-wall carbon nanotubes

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2020年第19期54卷 105-111页

作者： Feng Zhang Jia Sun yonggang zheng Peng-Xiang Hou Chang Liu Min Cheng Xin Li Hui-Ming Cheng zhen Chen 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 Chin1Shenyang 110016China International Research Center for Computational Mechanics State Key Laboratory of Structural Analysis for Industrial EquipmentDepartment of Engineering MechanicsFaculty of Vehicle Engineering and MechanicsDalian University of TechnologyDalian 116024China Shenzhen Geim Graphene Center Tsinghua-Berkeley Shenzhen InstituteTsinghua UniversityShenzhen 518055China Department of Civil and Environmental Engineering University of MissouriColumbi1MO 65211USA

H_(2) is considered an indispensable component of the atmosphere for the growth of high-quality singlewall carbon nanotubes(SWCNTs)by chemical vapor ***,details of the roles H_(2) playing are still unclear due to the complex conditions of SWCNT *** this study,we elucidate the functions of H_(2) in the selective growth of semiconducting SWCNTs(s-SWCNTs)by using monodispersed uniform Fe nanoparticles as a ***-quality s-SWCNTs were synthesized by finely tuning the concentration of H_(2) and the other growth *** data combined with atomistic simulations indicate that H_(2) not only adjusts the concentration of the carbon source,but also serves as a mild etchant that selectively removes small carbon caps grown by a perpendicular mode from the Fe *** results provide useful hints for the controlled growth of SWCNTs with a semiconducting or metallic conductivity,and even a specific chirality.

关键词： Single-wall carbon nanotubes Controlled growth Semiconducting Growth mode H_(2)

How temperature and hydrostatic pressure impact organic room temperature phosphorescence from H-aggregation of planar triarylboranes and the application in bioimaging

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2023年第3期66卷 816-825页

作者： Liangjing Tu Yuanyuan Fan Changjiang Bi Leyi Xiao yonggang Li Aisen Li Weilong Che Yujun Xie Yufeng Zhang Shuping Xu Weiqing Xu Qianqian Li zhen Li Institute of Molecular Aggregation Science Tianjin UniversityTianjin 300072 China Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials Department of ChemistryWuhan UniversityWuhan 430072China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China School and Hospital of Stomatology Wuhan UniversityWuhan 430079China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New CityFuzhou 350027China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Tianjin UniversityTianjin 300072China

Highly efficient persistent organic room temperature phosphorescence(RTP) has attracted increasing attention because of promising applications in fields of chemical sensors, optoelectronic devices, information security, and bioimaging, etc. Wherein,the crystal engineering of H-aggregation offers stabilization for long-lived triplet exciton for RTP, but the related research is rare because of the scarcity of ideal phosphorescent H-aggregate. Herein, we designed planar tricoordinate organoboron derivatives with molecular arrangement in ideal H-aggregation. The integration of Br atom can largely enhance RTP efficiency through increasing SOC effect, while the antiparallel molecular arrangement causes annihilation of triplet exciton. Thanks to good selfassembly property, their RTP can even be observed in PMMA matrix with doping ratio of merely 1 wt%. We further found that the cryogenic temperature contributes to stabilizing triplet exciton in H-aggregation, leading to red-shifted phosphorescence. By applying high hydrostatic pressure, the phosphorescence was largely enhanced and redshifted, demonstrating the crucial role of H-aggregation on RTP property. In phosphorescent tissue imaging of live mouse, nanoparticles of BrBA exhibited high contrast image via eliminating the interference of autofluorescence.

关键词： room temperature phosphorescence H-aggregation planar triarylboranes bioimaging

Supramolecular self-assembly of EGCG-selenomethionine nanodrug for treating osteoarthritis

在线全文

学校读者我要写书评

暂无评论

Bioactive Materials 2024年第2期32卷 164-176页

作者： Haichao Yu Zelong Song Jie Yu Boyuan Ren Yuan Dong yonggang You zhen Zhang Chengqi Jia Yunpeng Zhao Xuhui Zhou Haifeng Sun Xuesong Zhang School of Medicine Nankai UniversityTianjin 300071China Department of Orthopaedics The Fourth Medical Center of PLA General HospitalBeijing 100048China School of Radiology Shandong First Medical University and Shandong Academy of Medical SciencesShandong271016China Department of Orthopaedics Changzheng HospitalSecond Military Medical University(Naval Medical University)Shanghai200003China Department of Orthopaedics Qilu HospitalCheeloo College of MedicineShandong UniversityShandong250012China Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Beijing Institute of Radiation Medicine Beijing 100850China Department of Orthopedics Beijing Jishuitan HospitalBeijing 100035China

Osteoarthritis(OA)has emerged as a significant health concern among the elderly population,with increasing attention paid to ferroptosis-induced OA in recent ***,the prolonged use of nonsteroidal anti-inflammatory drugs or corticosteroids can lead to a series of side effects and limited therapeutic *** study aimed to employ the Mannich condensation reaction between epigallocatechin-3-gallate(EGCG)and selenomethionine(SeMet)to efficiently synthesize polyphenol-based nanodrugs in aqueous media for treating *** biology experiments demonstrated that EGCG-based nanodrugs(ES NDs)could effectively reduce glutathione peroxidase 4(GPX4)inactivation,abnormal Fe2+accumulation,and lipid peroxidation induced by oxidative stress,which ameliorated the metabolic disorder of chondrocytes and other multiple pathological processes triggered by ***,imaging and histopathological analysis of the destabilization of the medial meniscus model in mice confirmed that ES NDs exhibiting significant therapeutic effects in relieving *** intra-articular delivery of ES NDs represents a promising approach for treating OA and other joint inflammatory diseases.

关键词： Osteoarthritis Ferroptosis Natural product Nanodrug Antioxidants