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Graphene-driving strain engineering to enable strain-free epitaxy of AlN film for deep ultraviolet light-emitting diode

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Light(Science & Applications) 2022年第5期11卷 808-819页

作者： Hongliang Chang Zhetong Liu Shenyuan Yang Yaqi Gao jingyuan shan Bingyao Liu Jingyu Sun Zhaolong Chen Jianchang Yan Zhiqiang Liu Junxi Wang Peng Gao Jinmin Li Zhongfan Liu Tongbo Wei Research and Development Center for Semiconductor Lighting Technology Institute of SemiconductorsChinese Academy of Sciences100083 BeijingChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences100049 BeijingChina Center for Nanochemistry(CNC) Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking University100871 BeijingChina Electron Microscopy Laboratory and International Center for Quantum MaterialsSchool of PhysicsPeking University100871 BeijingChina Beijing graphene institute(BGI) 100095 BeijingChina Academy for Advanced Interdisciplinary Studies Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced MaterialsPeking University100871 BeijingChina State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of Sciences100083 BeijingChina

The energy-efficient deep ultraviolet(DUV)optoelectronic devices suffer from critical issues associated with the poor quality and large strain of nitride material system caused by the inherent mismatch of heteroepitaxy.In this work,we have prepared the strain-free AlN film with low dislocation density(DD)by graphene(Gr)-driving strain-pre-store engineering and a unique mechanism of strain-relaxation in quasi-van der Waals(QvdW)epitaxy is presented.The DD in AlN epilayer with Gr exhibits an anomalous sawtooth-like evolution during the whole epitaxy process.Gr can help to enable the annihilation of the dislocations originated from the interface between AlN and Gr/sapphire by impelling a lateral two-dimensional growth mode.Remarkably,it can induce AlN epilayer to pre-store sufficient tensile strain during the early growth stage and thus compensate the compressive strain caused by hetero-mismatch.Therefore,the low-strain state of the DUV light-emitting diode(DUV-LED)epitaxial structure is realized on the strain-free AlN template with Gr.Furthermore,the DUV-LED with Gr demonstrate 2.1 times enhancement of light output power and a better stability of luminous wavelength compared to that on bare sapphire.An in-depth understanding of this work reveals diverse beneficial impacts of Gr on nitride growth and provides a novel strategy of relaxing the vital requirements of hetero-mismatch in conventional heteroepitaxy.

关键词： sapphire diode strain

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Copper acetate-facilitated transfer-free growth of high-quality graphene for hydrovoltaic generators

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National Science Review 2022年第7期9卷 71-79页

作者： jingyuan shan Sunmiao Fang Wendong Wang Wen Zhao Rui Zhang Bingzhi Liu Li Lin Bei Jiang Haina Ci Ruojuan Liu Wen Wang Xiaoqin Yang Wenyue Guo Mark H.Rümmeli Wanlin Guo Jingyu Sun Zhongfan Liu Center for Nanochemistry (CNC) Beijing Science and Engineering Center for Nanocarbons Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Academy for Advanced Interdisciplinary Studies Peking University Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education State Key Laboratory of Mechanics and Control of Mechanical Structures Institute of Nanoscience Nanjing University of Aeronautics and Astronautics Department of Physics and Astronomy University of Manchester School of Materials Science and Engineering China University of Petroleum (East China) College of Energy Soochow Institute for Energy and Materials Innovations (SIEMIS)Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow University Beijing Graphene Institute (BGI)

Direct synthesis of high-quality graphene on dielectric substrates without a transfer process is of vital importance for a variety of applications.Current strategies for boosting high-quality graphene growth,such as remote metal catalyzation,are limited by poor performance with respect to the release of metal catalysts and hence suffer from a problem with metal residues.Herein,we report an effective approach that utilizes a metal-containing species,copper acetate,to continuously supply copper clusters in a gaseous form to aid transfer-free growth of graphene over a wafer scale.The thus-derived graphene films were found to show reduced multilayer density and improved electrical performance and exhibited a carrier mobility of8500 cm~2 V-1s-1.Furthermore,droplet-based hydrovoltaic electricity generator devices based on directly grown graphene were found to exhibit robust voltage output and long cyclic stability,in stark contrast to their counterparts based on transferred graphene,demonstrating the potential for emerging energy harvesting applications.The work presented here offers a promising solution to organize the metal catalytic booster toward transfer-free synthesis of high-quality graphene and enable smart energy generation.

关键词： chemical vapor deposition graphene copper acetate hydrovoltaic electricity generator transfer-free growth

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Current approaches of nanomedicines in the market and various stage of clinical translation

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Acta Pharmaceutica Sinica B 2022年第7期12卷 3028-3048页

作者： Xiaoting shan Xiang Gong Jie Li jingyuan Wen Yaping Li Zhiwen Zhang State Key Laboratory of Drug Research&Center of Pharmaceutics Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China Yantai Key Laboratory of Nanomedicine&Advanced Preparations Yantai Institute of Materia MedicaYantai 264000China School of Pharmacy University of Chinese Academy of SciencesBeijing 100049China School of Pharmacy University of AucklandAuckland 1142New Zealand

Compared with traditional drug therapy,nanomedicines exhibit intriguing biological features to increase therapeutic efficiency,reduce toxicity and achieve targeting delivery.This review provides a snapshot of nanomedicines that have been currently launched or in the clinical trials,which manifests a diversified trend in carrier types,applied indications and mechanisms of action.From the perspective of indications,this article presents an overview of the applications of nanomedicines involving the prevention,diagnosis and treatment of various diseases,which include cancer,infections,blood disorders,cardiovascular diseases,immuno-associated diseases and nervous system diseases,etc.Moreover,the review provides some considerations and perspectives in the research and development of nanomedicines to facilitate their translations in clinic.

关键词： Nanomedicines Nanoparticles Liposomes Vaccines Marketed products Clinical translations Disease-driven design Quality by design

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Batch synthesis of transfer-free graphene with wafer-scale uniformity

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Nano Research 2020年第6期13卷 1564-1570页

作者： Bei Jiang Qiyue Zhao Zhepeng Zhang Bingzhi Liu jingyuan shan Liang Zhao Mark H.Rümmeli Xuan Gao Yanfeng Zhang Tongjun Yu Jingyu Sun Zhongfan Liu Center for Nanochemistry(CNC) Beijing Science and Engineering Center for NanocarbonsCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing100871China State Key Laboratory for Artificial Microstructures and Mesoscopic Physics School of PhysicsPeking UniversityBeijing100871China College of Energy Soochow Institute for Energy and Materials Innovations(SIEMIS)Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou215006China Beijing Graphene Institute(BGI) Beijing100095China

Scalable synthesis of transfer-free graphene over insulators offers exciting opportunity for next-generation electronics and optoelectronics.However,rational design of synthetic protocols to harvest wafer-scale production of directly grown graphene still remains a daunting challenge.Herein we explore a batch synthesis of large-area graphene with wafer-scale uniformity by virtue of direct chemical vapor deposition(CVD)on quartz.Such a controllable CVD approach allows to synthesize 30 pieces of 4-inch graphene wafers in one batch,affording a low fluctuation of optical and electrical properties.Computational fluid dynamics simulations reveal the mechanism of uniform growth,indicating thermal field and confined flow field play leading roles in attaining the batch uniformity.The resulting wafer-scale graphene enables the direct utilization as key components in optical elements.Our method is applicable to other types of insulating substrates(e.g.,sapphire,SiO2/Si,Si3N4),which may open a new avenue for direct manufacture of graphene wafers in an economic fashion.

关键词： graphene batch synthesis direct chemical vapor deposition(CVD) uniformity wafer-scale confined flow

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Neuroprotective effect of hydroxy-α-sanshool against β-amyloid-induced damage in differentiated PC12 cells

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Chinese Medical Journal 2023年第17期136卷 2140-2142页

作者： Shufang shan Siquan Zhou Guochen Ma Xiaoyu Wang jingyuan Xiong Guo Cheng Laboratory of Molecular Translational Medicine Center for Translational MedicineKey Laboratory of Birth Defects and Related Diseases of Women and Children(Sichuan University)Ministry of EducationDepartment of PediatricsWest China Second University HospitalSichuan UniversityChengduSichuan 610041China Healthy Food Evaluation Research Center West China School of Public Health and West China Fourth HospitalSichuan UniversityChengduSichuan 610041China

To the Editor:Alzheimer’s disease(AD)is a chronic neurodegenerative disorder that accounts for approximately 70%of global dementia cases and leads to cognitive and behavioral impairments.[1]Neuritic plaques and neurofibrillary tangles are the pathological hallmarks of AD and are related to the accumulation of b-amyloid(Ab)peptides in cerebral tissues and cytoskeletal changes,which arise from the hyperphosphorylation of microtubule-associated tau proteins in neurons.Oxidative stress is among the earliest events in AD pathogenesis.The accumulation of Ab could promote the production of reactive oxygen species(ROS)and consequently lipid peroxidation,protein oxidation,and tau hyperphosphorylation,exerting toxic effects on synapses and neurons.In turn,oxidative stress could increase Ab production.Therefore,antioxidant therapy is becoming a popular strategy for treating AD.

关键词： protective amyloid peroxidation

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Identification of novel candidate genes in East Asian COPD patients by the functional summary-based imputation and the unified test for molecular signatures:a transcriptome-wide association study

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Chinese Medical Journal 2023年第13期136卷 1612-1614页

作者： Ye Tian Shufang shan Qixue Bao Siquan Zhou Xia Jiang Mengqiao Wang Shu Yin jingyuan Xiong Guo Cheng Healthy Food Evaluation Research Center West China School of Public Health and West China Fourth HospitalSichuan UniversityChengduSichuan 610041China Department of Pediatrics Laboratory of Molecular Translational MedicineCenter for Translational MedicineKey Laboratory of Birth Defects and Related Diseases of Women and Children(Sichuan University)Ministry of EducationWest China Second University HospitalSichuan UniversityChengduSichuan 610041China School of Information Science and Technology ShanghaiTech UniversityShanghai 201210China

To the Editor:Chronic obstructive pulmonary disease(COPD),a clinical syndrome encompassing a spectrum of chronic,progressive,and debilitating respiratory disorders,is increasingly recognized as a multisystemic heterogeneous disease.[1]Because the characteristics of East Asian COPD patients differ from those of Westerners,it would be practical to investigate whether variations in COPD genetic performance exist between East Asian and Western populations.

关键词： patients respiratory clinical

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基于数据虚拟化模型的铁路客运站视频数据湖研究

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铁路计算机应用 2024年第5期33卷 9-13页

作者：徐春婕赵晓艳单靖原王静杨国元中国铁道科学研究院集团有限公司电子计算技术研究所北京100081 北京经纬信息技术有限公司北京100081 北京邮电大学国际学院北京100876

针对当前铁路旅客服务与生产管控平台(简称:管控平台)智能视频分析应用中存在的视频接入方式不规范、智能分析模型精度低、数据传输带宽受限等问题,设计了视频数据接入及存储硬件架构,在带宽受限的情况下,实现了视频码流、设备管理信息... 详细信息

针对当前铁路旅客服务与生产管控平台(简称:管控平台)智能视频分析应用中存在的视频接入方式不规范、智能分析模型精度低、数据传输带宽受限等问题,设计了视频数据接入及存储硬件架构,在带宽受限的情况下,实现了视频码流、设备管理信息的安全接入,满足视频数据存储应用需求;构建了基于数据虚拟化模型的铁路客运客运站视频数据湖体系架构,满足客运站智能视频分析的实时性需求;对设备配置能力进行估算,并对主要设备进行配置。文章的研究结果可为相关工程的建设、设计和实施提供参考。

关键词：旅客服务与生产管控综合视频监控虚拟化数据湖数据链路

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不同含糖饮料摄入水平小学生肠道菌群差异

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中国学校卫生 2024年第3期45卷 335-340,345页

作者：张琴刘雪婷张可馨田野何春雷王一迪徐裕杰单树方汪晓语熊静远成果何方四川大学华西公共卫生学院(四川大学华西第四医院) 成都610041 四川大学华西第二医院西部妇幼医学研究院妇儿营养中心四川大学华西护理学院

目的探讨不同含糖饮料摄入水平小学生肠道菌群的差异,为更好地识别儿童健康风险并制定有针对性的健康政策提供科学依据。方法于2022年6月,采用分层整群随机抽样方法选取成都市健康小学生192名,采用膳食频率问卷调查含糖饮料摄入量,依据... 详细信息

目的探讨不同含糖饮料摄入水平小学生肠道菌群的差异,为更好地识别儿童健康风险并制定有针对性的健康政策提供科学依据。方法于2022年6月,采用分层整群随机抽样方法选取成都市健康小学生192名,采用膳食频率问卷调查含糖饮料摄入量,依据小学生每日含糖饮料摄入量中位水平分为低摄入组(96名)和高摄入组(96名)。使用16S rRNA高通量测序对两组小学生新鲜粪便标本进行肠道菌群检测,比较两组肠道菌群的多样性和群落结构差异。结果低摄入组小学生含糖饮料摄入量为(21.3±1.6)mL/d,高摄入组摄入量为(269.6±37.3)mL/d。多样性分析结果显示,低摄入组与高摄入组肠道菌群α多样性的可观测的OTU(Observed_otus)指数[298.50(259.75,342.25),305.50(244.25,367.75)],测序深度(Goods_coverage)指数[1.00(1.00,1.00),1.00(1.00,1.00)],Chao指数[304.18(260.75,348.78),305.88(245.68,370.88)],香农(shannon)指数[5.88(5.29,6.45),5.71(4.89,6.28)],辛普森(Simpson)指数[0.95(0.91,0.97),0.94(0.88,0.97)]差异均无统计学意义(Z值分别为-0.64,-0.76,-0.54,-1.76,-1.67,P值均>0.05);两组肠道菌群的β多样性差异无统计学意义(R^(2)=0.006,P>0.05)。在菌属水平,低摄入组中布劳特氏菌属[0.033(0.018,0.055)]、纺锤链杆属[0.009(0.005,0.015)]丰度均高于高摄入组[0.024(0.013,0.041),0.006(0.003,0.011)],差异均有统计学意义(Z值分别为-2.52,-2.81,P值均<0.05)。LEfSe分析显示两组菌群的组间差异主要体现在布劳特氏菌属、纺锤链杆属及八叠球菌属(LDA值分别为3.56,3.12,3.53,P值均<0.05)。结论不同含糖饮料摄入水平的小学生肠道菌群多样性和整体结构差异不大,但菌属水平存在物种差异,可为识别小学生的健康风险,制定健康对策提供科学依据。

关键词：碳水化合物饮料摄食行为胃肠道细菌儿童

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Genomic insights into the origin, adaptive evolution, and herbicide resistance of Leptochloa chinensis, a devastating tetraploid weedy grass in rice fields

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Molecular Plant 2022年第6期15卷 1045-1058页

作者： Lifeng Wang Xuepeng Sun Yajun Peng Ke Chen shan Wu Yanan Guo jingyuan Zhang Haona Yang Tao Jin Lamei Wu Xiaomao Zhou Bin Liang Zhenghong Zhao Ducai Liu Zhangjun Fei Lianyang Bai State Key Laboratory of Hybrid Rice Hunan Academy of Agricultural SciencesChangsha 410125China Hunan Weed Science Key Laboratory Hunan Academy of Agricultural SciencesChangsha 410125China Boyce Thompson Institute Cornell UniversityIthacaNY 14853USA College of Horticulture Science Zhejiang A&F UniversityHangzhou 311300China Qingdao Kingagroot Compounds Co.Ltd Qingdao 266000China USDA-ARS Robert W.Holley Center for Agriculture and HealthIthacaNY 14853USA

Chinese sprangletop (Leptochloa chinensis), belonging to the grass subfamily Chloridoideae, is one of the most notorious weeds in rice ecosystems. Here, we report a chromosome-scale reference genome assembly and a genomic variation map of the tetraploid L. chinensis. The L. chinensis genome is derived from two diploid progenitors that diverged ∼10.9 million years ago, and its two subgenomes display neither fractionation bias nor overall gene expression dominance. Comparative genomic analyses reveal substantial genome rearrangements in L. chinensis after its divergence from the common ancestor of Chloridoideae and, together with transcriptome profiling, demonstrate the important contribution of tetraploidization to the gene sources for the herbicide resistance of L. chinensis. Population genomic analyses of 89 accessions from China reveal that L. chinensis accessions collected from southern/southwestern provinces have substantially higher nucleotide diversity than those from the middle and lower reaches of the Yangtze River, suggesting that L. chinensis spread in China from the southern/southwestern provinces to the middle and lower reaches of the Yangtze River. During this spread, L. chinensis developed significantly increased herbicide resistance, accompanied by the selection of numerous genes involved in herbicide resistance. Taken together, our study generated valuable genomic resources for future fundamental research and agricultural management of L. chinensis, and provides significant new insights into the herbicide resistance as well as the origin and adaptive evolution of L. chinensis.

关键词： Leptochloa weed sgenome polyploidization genome evolution genetic diversity adaptive selection herbicide resistance

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基于多目标决策优化的加氢站选址动态模型

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油气与新能源 2024年第2期36卷 10-17页

作者：黄靖元于姗王登海饶家豪付梦瑶周犁文唐春李曼平西南石油大学新能源与材料学院成都610500 中国石油天然气股份有限公司长庆油田分公司西安710018

氢能是一种清洁无污染、能量高、用途广泛的二次能源,也是未来中国能源体系不可或缺的重要部分。氢能的开发和利用是全球能源技术革命的重要方向,加氢站作为氢能利用基础设施,是整个氢能产业链的关键,加快加氢站的建设对氢能的发展具有... 详细信息

氢能是一种清洁无污染、能量高、用途广泛的二次能源,也是未来中国能源体系不可或缺的重要部分。氢能的开发和利用是全球能源技术革命的重要方向,加氢站作为氢能利用基础设施,是整个氢能产业链的关键,加快加氢站的建设对氢能的发展具有重要意义。结合氢能产业链基础和相关氢能政策,为加氢站的建设布局提供参考;综合分析出加氢站选址的重点考察因素,并利用AHP(Analytic Hierarchy Process)层次分析法计算出每个因素的权重占比,得出了盈亏情况占比最大的结论;结合数学建模计算,建立了加氢站盈亏平衡的动态预测模型;通过对川渝地区5个加气/加油站点进行实地调研,得到了最优选址的盈亏平衡分析。以此研究为例,形成系统的加氢站布局选址的研究方法,为相关企业布局加氢站业务提供重要支撑和参考。

关键词：氢能加氢站选址模型

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