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Modulating p-type doping of two-dimensional material palladium diselenide

Nano Research 2024年第4期17卷 3232-3244页

作者： Jiali yang Yu Liu En-yang Wang Jinbo Pang Shirong Huang Thomas Gemming Jinshun Bi Alicja Bachmatiuk Hao Jia Shu-Xian Hu Chongyun Jiang Hong Liu Gianaurelio Cuniberti Weijia Zhou Mark H Rümmeli Institute for Advanced Interdisciplinary Research(iAIR) University of JinanJinan 250022China Institute for Materials Chemistry Leibniz Institute for Solid State and Materials Research Dresden(IFW Dresden)20 Helmholtz StrasseDresden 01069Germany State Key Lab of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China College of Energy Soochow Institute for Energy and Materials Innovations Soochow UniversitySuzhou 215006China Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow UniversitySuzhou 215006China School of Integrated Circuits University of Chinese Academy of SciencesBeijing 101408China Institute of Microelectronics of Tianjin Binhai New Area Tianjin 300451China Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China Lukasiewicz Research Network PORT Polish Center for Technology DevelopmentStablowicka 147Wroclaw 54-066Poland School of Mathematics and Physics University of Science and Technology BeijingBeijing 100083China College of electronic information and optical engineering Nankai UniversityTianjin 300350China Centre of Polymer and Carbon Materials Polish Academy of SciencesM.Curie Sklodowskiej 34Zabrze 41-819Poland Center for Energy and Environmental Technologies VŠB-Technical University of Ostrava17.Listopadu 15Ostrava 70833Czech Republic State Key Laboratory of Crystal Materials Center of Bio&Micro/Nano Functional MaterialsShandong UniversityJinan 250100China Dresden Center for Computational Materials Science Technische Universität DresdenDresden 01062Germany Dresden Center for Intelligent Materials(GCL DCIM) Technische Universität DresdenDresden 01062Germany Institute for Materials Science and Max Bergmann Center of Biomaterials Technische Universität DresdenDresden 01069Germany Center for Advancing Electronics Dresden Technische Universität DresdenDresden 01069Germany

The van der Waals heterostructures have evolved as novel materials for complementing the Si-based semiconductor ***-10 noble metal dichalcogenides(e.g.,PtS_(2),PtSe_(2),PdS_(2),and PdSe_(2))have been listed into two-dimensional(2D)materials toolkit to assemble van der Waals *** them,PdSe_(2) demonstrates advantages of high stability in air,high mobility,and wide tunable ***,the regulation of p-type doping of PdSe_(2) remains unsolved problem prior to fabricating p–n junction as a fundamental platform of semiconductor ***,a quantitative method for the controllable doping of PdSe_(2) is yet to be *** this study,the doping level of PdSe_(2) was correlated with the concentration of Lewis acids,for example,SnCl_(4),used for *** the transfer characteristics,the threshold voltage(the gate voltage corresponding to the minimum drain current)increased after SnCl_(4) soaking ***_(2) transistors were soaked in SnCl_(4) solutions with five different *** threshold voltages from the as-obtained transfer curves were extracted for linear fitting to the threshold voltage versus doping concentration correlation *** study provides in-depth insights into the controllable p-type doping of PdSe_(2).It may also push forward the research of the regulation of conductivity behaviors of 2D materials.

关键词： two-dimensional(2D)materials Lewis acid treatment p-type doping field-effect transistors transfer characteristic

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孕晚期凶险型前置胎盘30例临床分析

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山西医科大学学报 2013年第6期44卷 471-475页

作者：李晴杨茵葛榕福建医科大学省立临床医学院妇产科福州350004

目的探讨和分析孕晚期凶险型前置胎盘患者的临床特点、母婴结局和终止妊娠的治疗方案。方法回顾我院2008-01～2012-12收治的30例孕晚期凶险型前置胎盘的临床资料,将其分为植入组及非植入组进行分析比较。结果①我院近5年来凶险型前置胎... 详细信息

目的探讨和分析孕晚期凶险型前置胎盘患者的临床特点、母婴结局和终止妊娠的治疗方案。方法回顾我院2008-01～2012-12收治的30例孕晚期凶险型前置胎盘的临床资料,将其分为植入组及非植入组进行分析比较。结果①我院近5年来凶险型前置胎盘的发病率为2.2‰(30/13 790);伴发胎盘植入发病率为1.2‰(16/13 790)。植入组既往剖宫产次数多(P=0.01)。植入组与非植入组在首次阴道出血时间与产前阴道出血量方面无统计学差异(P>0.05)。②植入组产妇产时产后出血量大,切除子宫及发生继发性凝血障碍的例数多,并易合并膀胱损伤。植入组发生两种以上并发症的新生儿多,住院天数长。③凶险型前置胎盘治疗方案根据具体情况而不同,其中3例行介入治疗,2例保留子宫。结论凶险型前置胎盘伴胎盘植入常引起严重母婴并发症,应做好产前宣教尽量减少无指征的剖宫产手术,终止妊娠的治疗方案以尽量降低母婴生命危险为准,介入治疗值得关注。

关键词：凶险型前置胎盘胎盘植入母婴结局介入治疗

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动态增强螺旋CT和数字减影血管造影对原发性肝癌子灶诊断价值的对比研究

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中国肿瘤临床与康复 2014年第9期21卷 1031-1033页

作者：杨吟池杨爱东陈进江苏省东台市人民医院介入放射科东台224200

目的对比分析动态增强螺旋计算机断层成像(CT)和数字减影血管造影(DSA)对原发性肝癌子灶(≤2 cm)的临床诊断价值。方法回顾性分析2011年1月至2014年1月86例伴发子灶的肝癌患者动态增强螺旋CT影像和DSA影像结果,两次检查时间间隔在2周以... 详细信息

目的对比分析动态增强螺旋计算机断层成像(CT)和数字减影血管造影(DSA)对原发性肝癌子灶(≤2 cm)的临床诊断价值。方法回顾性分析2011年1月至2014年1月86例伴发子灶的肝癌患者动态增强螺旋CT影像和DSA影像结果,两次检查时间间隔在2周以内。结果DSA共发现191个肝癌子灶(右叶133个,左叶58个),平均直径1.5 cm。动态增强螺旋CT共发现143个子灶(右叶92个,左叶51个),平均直径1.8 cm。结论 DSA对直径≤2 cm肝癌子灶的检出具有一定的优势,其检出个数和对病灶直径的检测明显优于动态增强螺旋CT。

关键词：肝细胞癌动态增强螺旋计算机断层成像数字减影血管造影

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基于RAMSIS的驾驶员进出拖拉机运动轨迹分析

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拖拉机与农用运输车 2020年第6期47卷 37-41页

作者：郭晖李得志杨茵杨根定拖拉机动力系统国家重点实验室洛阳拖拉机研究所有限公司河南洛阳471039

随着用户对拖拉机舒适性要求的提高,进出驾驶室方便性研究也成为拖拉机人机工程研究的重点。利用RAMSIS软件运动记录技术,模拟生成人体关键点的运动轨迹,通过对运动轨迹特性以及轨迹与车身部件位置关系的分析,为驾驶室设计提供参考依据。

关键词：拖拉机人机工程 RAMSIS 运动分析

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A Post-Quantum Cross-Domain Authentication Scheme Based on Multi-Chain Architecture

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Computers, Materials & Continua 2024年第2期78卷 2813-2827页

作者： Yi-Bo Cao Xiu-Bo Chen Yun-Feng He Lu-Xi Liu yin-Mei Che Xiao Wang Ke Xiao Gang Xu Si-Yi Chen Information Security Center State Key Laboratory ofNetworking and Switching TechnologyBeijing University of Posts and TelecommunicationsBeijing100876China Information Center of China North Industries Group Corporation Beijing100089China School of Information Science and Technology North China University of TechnologyBeijing100144China

Due to the rapid advancements in network technology,blockchain is being employed for distributed data *** the Internet of Things(IoT)scenario,different participants manage multiple blockchains located in different trust domains,which has resulted in the extensive development of cross-domain authentication ***,the emergence of many attackers equipped with quantum computers has the potential to launch quantum computing attacks against cross-domain authentication schemes based on traditional cryptography,posing a significant security *** response to the aforementioned challenges,our paper demonstrates a post-quantum cross-domain identity authentication scheme to negotiate the session key used in the cross-chain asset exchange ***,our paper designs the hiding and recovery process of user identity index based on lattice cryptography and introduces the identity-based signature from lattice to construct a post-quantum cross-domain authentication ***,our paper utilizes the hashed time-locked contract to achieves the cross-chain asset exchange of blockchain nodes in different trust ***,the security analysis reduces the security of the identity index and signature to Learning With Errors(LWE)and Short Integer Solution(SIS)assumption,respectively,indicating that our scheme has post-quantum *** but not least,through comparison analysis,we display that our scheme is efficient compared with the cross-domain authentication scheme based on traditional cryptography.

关键词： Cross-domain identity authentication lattice-based cryptography blockchain hashed time-locked contract

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Single Ti atoms coupled with Ti-O clusters enable low temperature hydrogen cycling by sodium alanate

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Rare Metals 2024年第6期43卷 2671-2681页

作者： Zhuang-He Ren Xin Zhang Wen-Xuan Zhang Zhen-Guo Huang Li-Mei yang Ya-Xiong yang Zheng-Long Li Juan Li Wen-Ping Sun Ming-Xia Gao Hong-Ge Pan Yong-Feng Liu State Key Laboratory of Silicon and Advanced Semiconductor Materials Zhejiang UniversityHangzhou 310027China School of Materials Science and Engineering Zhejiang UniversityHangzhou 310058China School of Civil&Environmental Engineering.University of Technology Sydney Sydney2007 NSWAustralia Institute of Science and Technology for New Energy Xi'an Technological UniversityXi'an 710021China College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China

Ti-based catalysts are known to improve the hydrogen storage performance of NaAlH4by facilitating the dissociation/recombination of H-H and Al-H *** catalytic activity of metallic Ti species strongly depends on its particle size and *** clusters and even single atoms are therefore highly desirable,but their controllable fabrication has been highly *** rein,we demonstrate a novel facile sonochemical synthesis of a Ti-O clusters featuring single Ti atom catalyst at room *** reducing TiCl_(4)by MgBu_(2)with ultrasound instead of heating as driving force,numerous single Ti atoms coupled with Ti-O clusters with Ti loading on graphene(Ti_(1)/Ti-O@G)up to 22.6 wt%have been successfully *** prepared Ti_(1)/Ti-O@G contributes high reactivity and superior catalytic activity,therefore enabling full dehydrogenation of NaAlH_(4)at 80℃in thermogravimetric mode and re-hydrogenation at 30℃and 10 MPa with 4.9 wt% H_(2).This fact indicates for the first time that single Ti atom catalyst with high loading is highly effective in catalyzing hydrogen cycling of NaAlH4at remarkably reduced temperatures.

关键词： Hydrogen storage Nanocatalysis Transition metals Single Ti atoms NaAlH_(4)

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Enhancing stability of diradical polycyclic hydrocarbons via P=O-attaching

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Chinese Chemical Letters 2024年第8期35卷 309-313页

作者： Jingyuan yang Xinyu Tian Liuzhong Yuan Yu Liu Yue Wang Chuandong Dou State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials Soochow UniversitySuzhou 215123China

Diradical polycyclic hydrocarbons(PHs)have unique open-shell structures and interesting physical ***,owing to high reactivity of unpaired electrons,such open-shell organic diradicaloids are usually less stable than closed-shell systems,limiting their practical *** this study,we report P=O-attaching of diradical PHs as a new strategy to enhance their stability while maintaining diradi-cal *** P=O-attached PHs containing the indeno[1,2-b]fluorene,fluoreno[3,2-b]fluorene and indeno[2,1-b]fluoreneπ-skeletons,respectively,were designed and *** theoretically and ex-perimentally proved,two of them have the relatively large diradical characters and open-shell singlet diradical *** comparison to their all-carbon analogues,the attached electron-withdrawing P=O groups endow them with much lower LUMO/HOMO energy levels but preserved magnetic activities and physical properties,such as thermally accessible triplet species and multi-redox ***,the P=O groups effectively decrease their oxidation activities and thereby lead to their remarkably excellent ambient ***,this P=O-attaching strategy will be applicable to other diradical PH systems and may promote the generation of stable organic diradicaloids for radical chemistry and materials.

关键词： Polycyclic hydrocarbons Open-shell structure Diradical character Stability Oxidation activity

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游客与旅游地明星动物商品化的邂逅研究——以四川大熊猫基地为例

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地理学报 2024年第2期79卷 534-548页

作者：尹铎卢薇朱竑广州大学地理科学与遥感学院广州510006 广州大学华南人文地理与城市发展研究中心广州510006 粤港澳大湾区移民治理与城市发展智库广州510006 深圳科学高中深圳518129

人与动物的互动实践已成为人文地理学者探索人地关系的重要研究议题。以四川大熊猫基地为案例,基于“魅力”概念,运用深度访谈、参与式观察与文本分析的方法,深入分析游客与明星动物在旅游活动中的邂逅,并揭示在此旅游过程中动物的能动... 详细信息

人与动物的互动实践已成为人文地理学者探索人地关系的重要研究议题。以四川大熊猫基地为案例,基于“魅力”概念,运用深度访谈、参与式观察与文本分析的方法,深入分析游客与明星动物在旅游活动中的邂逅,并揭示在此旅游过程中动物的能动性发挥与游客的多物种间的旅游体验。研究发现,游客与大熊猫的邂逅发生在不同空间情境下,其多样性是旅游地设计并刻意安排的商品化结果。大熊猫的魅力之于差异化的空间情境往往具有不同的影响作用。具体而言:(1)在实体展示空间的“前台”中,大熊猫的生态魅力与美学魅力能够激发游客观览时的天然好感,旅游地对其进行利用以维持大熊猫旅游的不竭热度;(2)旅游地所构建的虚拟展示空间则提供了无法直接观览到的大熊猫生物学特征与生命历程,使游客与大熊猫邂逅形式得以补充与丰富;(3)而在实体展示空间的“后台”中,旅游与公益教育相结合,游客被允许接近大熊猫的生活空间,建立起基于肉身魅力的更深层次的亲密邂逅。总体看,大熊猫的魅力不仅塑造了游客的多物种间的旅游体验,而且还构建了游客对于四川的地方认同。研究以空间视角探究了人与动物互动所营建的关系网络及其映射的权力运作机制,为探索旅游情境下的人与动物关系提供了新尝试,也为理解地球生命共同体提供了来自地理学的解析。

关键词：野生动物旅游地能动性地方邂逅大熊猫四川

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Enhanced cycle stability of aprotic Li-O_(2) batteries based on a self-defensed redox mediator

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Chinese Chemical Letters 2024年第3期35卷 449-452页

作者： Guiru Sun Yan Wang Daming yang Zexu Zhang Wei Lu Ming Feng Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education Jilin Normal UniversityChangchun 130103China College of Information Technology Jilin Engineering Research Center of Optoelectronic Materials and DevicesJilin Normal UniversitySiping 136000China

LiBr as a promising redox mediator(RM)has been applied in Li-O_(2)batteries to improve oxygen evolution reaction kinetics and reduce ***,the redox shuttle of Br_(3)^-can induce the unexpected reactions and thus cause the degradation of LiBr and the corrosion of Li anode,resulting in the poor cyclability and the low round-trip ***,MgBr_(2)is firstly employed with dual functions for Li-O_(2)batteries,which can serve as a RM and a SEI film-forming *** Br^(–)is beneficial to facilitating the decomposition of Li_(2)O_(2)and thus decreasing the ***,a uniform SEI film containing Mg and MgO generates on Li anode surface by the in-situ spontaneous reactions of Mg^(2+)and Li anode in an O_(2)environment,which can suppress the redox shuttle of Br_(3)^-and improve the interface stability of Li anode and *** from these advantages,the cycle life of Li-O_(2)battery with MgBr_(2)electrolyte is significantly extended.

关键词： MgBr_(2) Redox mediator Redox shuttle Li anode SEI film

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Construction of daily precipitation series and the observational characteristics of extreme precipitation in Tianjin,China during 1888-2022

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Advances in Climate Change Research 2024年第1期15卷 52-61页

作者： Peng SI Qing-Xiang LI Xiao-yang CHEN Min WANG Chuan-Jun LUO Tianjin Meteorological Information Center Tianjin Meteorological BureauTianjin 300074China Research Centerfor Ecology and Environment of Central Asia Chinese Academy of SciencesWulumuqi 830011China School of Atmospheric Sciences Sun Yat-sen UniversityZhuhai 528478China Key Laboratory of Tropical Amosphere-Ocean System Ministry of EducationZhuhai 528478China Shaoguan Meteorological Service Shaoguan 512028China

Given the difficulties in rescuing and ensuring the quality of long-term climate data,current studies on century-scale climate change are usually limited to annual and monthly data,resulting in the poor detection of extreme climate events and their changes before *** this study,we reconstructed a daily precipitation series for Tianjin from 15 September 1887 to 31 December 2022 on the basis of the most comprehensive daily precipitation records collected from the Tianjin Meteorological Archive,China,and in reference to the precipitation analysis results based on the datasets developed by the Climatic Research Unit Time-Series version 4.06,Global Precipitation Climatology Centre and University of Delaware along with the application of various homogenisation methods for climate *** approach provides a complete and reliable century-long daily precipitation series for the study of regional or local extreme weather and climate *** reconstructed daily dataset reveals that the annual precipitation amount and R95 intensity in Tianjin during 1888-2022 lack significant trends and have values of 0.74±6.99 and-1.84±3.22 mm per decade,*** the annual and seasonal scales,the precipitation amount and R95 intensity,particularly those in autumn,have increased since the latter half of the 20th century relative to those in ***,the increase in precipitation amount and R95 intensity is relatively limited compared with that in atmospheric water vapour content due to surface warming,indicating the highly sensitive response of extreme precipitation events to *** addition,the estimates for the return periods of 5,10,20,50 and 100 years covering 1888-2022,1888-1950 and 1951-2022 depict that the intensity of heavy rain and above magnitude was highest in 1888-1950 and decreased in 1951-2022.

关键词： Over a century-long timescale Daily precipitation series Extreme precipitation Return period

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