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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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Nanoscale chemical segregation to twin interfaces in τ-MnAl-C and resulting effects on the magnetic properties

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Journal of Materials Science & Technology 2023年第3期134卷 22-32页

作者： Panpan Zhao Markus Gusenbauer Harald Oezelt Daniel Wolf thomas gemming thomas Schrefl Kornelius Nielsch thomas George Woodcock Leibniz IFW Dresden Helmholtzstr.20Dresden 01069Germany TU Dresden Institute of Materials ScienceDresden 01062Germany Department for Integrated Sensor Systems Danube University KremsKrems an der Donau 3500Austria

In this study,aberration-corrected scanning transmission electron microscopy coupled with electron energy-loss spectroscopy(STEM-EELS)was used to investigate the atomistic structure and chemical com-position of true twin and order twin boundaries in ferromagneticτ-*** twins and order twins were distinguished based on the diffraction patterns using *** elemental segregation was observed at the coherent true twin boundary but some Mn enrichment within a region of about 1.5-2 nm was found at the incoherent true twin boundary.A transition region with Mn enrichment about 4-6 nm wide was found at the order twin boundary.A carbon cluster with a size of around 5 nm was also found at the twin *** simulations were conducted to study the effect of this chemical seg-regation at twin interfaces on the magnetic *** results showed that the coercivity tends to increase with increasing structural and chemical disorder at the interface.

关键词： τ-MnAl-C Twin boundaries Elemental segregation STEM-EELS Micromagnetic simulations

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Synergistic protection of Si anode based on multi-dimensional graphitic carbon skeletons

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Nano Research 2022年第9期15卷 8146-8155页

作者： Qitao Shi Haiming Wang Junhua Zhou HuyQuang Ta Jiaqi Wang Xueyu Lian Klaudia Kurtyka Barbara Trzebicka thomas gemming Mark H.Rümmeli Soochow Institute for Energy and Materials Innovation College of EnergyKey Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215006China Institute for Complex Materials IFW Dresden20 Helmholtz StrasseDresden 01069Germany Centre of Polymer and Carbon Materials Polish Academy of SciencesM.Curie-Sklodowskiej 34Zabrze 41-819Poland thomas gemming-Institute of Environmental Technology VSB-Technical University of Ostrava17.Listopadu 15Ostrava 70833Czech Republic

Inspired by the natural corn structure,a Si@hollow graphene shell@graphene(Si@GS@G)anode material was prepared in which silicon nanoparticles were preliminarily anchored onto the surface of an elastic graphene shell and further constrained using graphene *** graphene oxide shells with abundant surficial hydrogen bonds,which were synthesized using a novel bottom-up method,were used as an intermediate material to anchor positively charged silicon nanoparticles via electrostatic attraction and achieve a rational spatial *** inner hollow graphene shell anchorage and outer graphene constraint synergistically constituted a porous and robust conductive corn-like *** as-fabricated Si@GS@G anode afforded efficient electron and ion transport pathways and improved structural stability,thereby enhancing Li+storage capability(505 mAh·g^(−1)at 10 A·g^(−1))and extending the lifespan compared to the single hollow graphene shell or graphene sheet-protected Si anode(72%capacity retention after 500 cycles).The improved kinetics of the Si@GS@G anode were investigated using electro impedance spectroscopy,galvanostatic intermittent titration,and pseudocapacitance contribution rate analysis,and the structural evolution was analyzed using ex situ electron *** study proposes a novel hollow graphene oxide shell as an activated intermediate material for designing a porous electrode structure that facilitates an enhanced electrochemical performance.

关键词： synergistic protection multi-dimensional graphitic carbons corn-like structure elastic skeleton Si/C anode

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Size and time dependent internalization of label-free nano-graphene oxide in human macrophages

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Nano Research 2017年第6期10卷 1980-1995页

作者： Rafael G. Mendes Angelo Mandarino Britta Koch Anne K. Meyer Alicja Bachmatiuk Cordula Hirsch thomas gemming Oliver G. Schmidt Zhongfan Liu Mark H. Rummeli College of Physics Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou 215006 China IFW Dresden Institute for Solid State and Materials Research P.O. Box D-01171 Dresden Germany Centre of Polymer and Carbon Materials Polish Academy of Sciences M. Curie-Sklodowskiej 34 Zabrze 41-819 Poland EMPA - Swiss Federal Laboratories for Materials Science and Technology Lerchenfeldstrasse 5 9014 St. Gallen Switzerland Material Systems for Nanoelectronics Chemnitz University of Technology Reichenhainer Sir. 70 09107 Chemnitz Germany ing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Beijing 100871 China

Graphene oxide shows great promise as a material for biomedical applications, e.g., as a multi-drug delivery platform. With this in view, reports of studies on the interaction between nanosized graphene oxide flakes and biological cells are beginning to emerge. However, the number of studies remains limited, and most used labeled graphene oxide samples to track the material upon endocytosis. Unfortunately, the labeling process alters the surface functionality of the graphene oxide, and this additional funcfionalization has been shown to alter the cellular response. Hence, in this work we used label-free graphene oxide. We carefully tracked the uptake of three different nanoscale graphene oxide flake size distributions using scanning/transmission electron microscopy. Uptake was investigated in undifferentiated human monocyte cells （THP-1） and differentiated macrophage cells. The data show clear size dependence for uptake, such that larger graphene oxide flakes （and clusters） are more easily taken up by the cells compared to smaller flakes. Moreover, uptake is shown to occur very rapidly, within two min of incubation with THP-1 cells. The data highlights a crucial need for cellular incubation studies with nanoparticles, to be conducted for short incubation periods as certain dependencies （e.g., size and concentration） are lost with longer incubation periods.

关键词： graphene oxide THP-1 cells label-free uptake size dependence

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Emerging Internet of Things driven carbon nanotubes-based devices

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Nano Research 2022年第5期15卷 4613-4637页

作者： Shu Zhang Jinbo Pang Yufen Li Feng Yang thomas gemming Kai Wang Xiao Wang Songang Peng Xiaoyan Liu Bin Chang Hong Liu Weijia Zhou Gianaurelio Cuniberti Mark HRümmeli Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong Institute for Advanced Interdisciplinary Research(iAIR)University of JinanJinan 250022China Department of Chemistry Guangdong Provincial Key Laboratory of CatalysisSouthern University of Science and TechnologyShenzhen 518055China Leibniz Institute for Solid State and Materials Research Dresden P.O.Box 270116Dresden D-01171Germany State Key Laboratory of Crystal Materials Center of Bio&Micro/Nano Functional MaterialsShandong University27 Shandanan RoadJinan 250100China School of Electrical Engineering Qingdao UniversityQingdao 266071China Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences 1068 Xueyuan AvenueShenzhen University TownShenzhen 518055China High-Frequency High-Voltage Device and Integrated Circuits R&D Center Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Microelectronic Devices&Integrated Technology Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China School of Chemistry and Chemical Engineering University of JinanJinan 250022China College of Energy Soochow Institute for Energy and Materials InnovationsSoochow UniversitySuzhou 215006China Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow UniversitySuzhou 215006China Centre of Polymer and Carbon Materials Polish Academy of SciencesM.Curie Sklodowskiej 34Zabrze 41-819Poland Institute of Environmental Technology(CEET) VSB-Technical University of Ostrava17.Listopadu 15Ostrava 70833Czech Republic 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 D

Carbon nanotubes(CNTs)have attracted great attentions in the field of electronics,sensors,healthcare,and energy *** emerging applications have driven the carbon nanotube research in a rapid ***,the structure control over CNTs has inspired an intensive research vortex due to the high promises in electronic and optical device ***,this in-depth review is anticipated to provide insights into the controllable synthesis and applications of high-quality ***,the general synthesis and post-purification of CNTs are briefly ***,the state-of-the-art electronic device applications are discussed,including field-effect transistors,gas sensors,DNA biosensors,and pressure ***,the optical sensors are delivered based on the *** addition,energy applications of CNTs are discussed such as thermoelectric energy ***,future opportunities are proposed for the Internet of Things(IoT)oriented sensors,data processing,and artificial intelligence.

关键词： carbon nanotubes electronics sensors electronic skins Internet of Things artificial intelligence

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Single Cr atom catalytic growth of graphene

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Nano Research 2018年第5期11卷 2405-2411页

作者： Huy Q. Ta Uang Zhao Wanjian Yin Darius Pohl Bemd Rellinghaus thomas gemming Barbara Trzebicka Justinas Palisaitis Gao Jing Per O. A. Persson Zhongfan Liu Alicja Bachmatiuk Mark H. Rummeli Soochow Institute for Energy and Materials Innovations College of Physics Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou 215005 China Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215006 China Centre of Polymer and Carbon Materials Polish Academy of Sciences M. Curie-Sklodowskiej 34 Zabrze 41-819 Poland IFW Dresden Helmholtz Strasse 20 01069 Dresden Germany Department of Physics Chemistry and Biology (IFM) Linkoping University SE-581 83 Linkoping Sweden Center for Nanochemistry Beijing Science and Engineering Centre for Nanocarbons Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Beijing 100871 China

Single atoms are the ultimate minimum size limit for catalysts. Graphene, as an exciting, ultimately thin （one atom thick） material can be imaged in a transmission electron microscope with relatively few imaging artefacts. Here, we directly observe the behavior of single Cr atoms in graphene mono- and di-vacancies and, more importantly, at graphene edges. Similar studies at graphene edges with other elemental atoms, with the exception of Fe, show catalytic etching of graphene. Fe atoms have been shown to both etch and grow graphene. In contrast, Cr atoms are only observed to induce graphene growth. Complementary theoretical calculations illuminate the differences between Fe and Cr, and confirm single Cr atoms as superior catalysts for sp^2 carbon growth.

关键词： in situ transmission electron microscope (TEM) electron driven catalysis Cr single atom graphene synthesis

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Enhanced π-π Interactions Between a C_(60) Fullerene and a Buckle Bend on a Double-Walled Carbon Nanotube

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Nano Research 2010年第2期3卷 92-97页

作者： Sandeep Gorantla Stanislav Avdoshenko Felix Börrnert Alicja Bachmatiuk Maria Dimitrakopoulou Franziska Schäffel Ronny Schönfelder Jürgen thomas thomas gemming Jamie HWarner Gianaurelio Cuniberti Jürgen Eckert Bernd Büchner Mark H.Rümmeli IFW Dresden P.O.Box 270116D-01171 DresdenGermany Institute for Materials Science and Max Bergmann Center of Biomaterials Dresden University of TechnologyDresden 01062Germany Department of Materials University of OxfordParks Rd.Oxford OX13PHUnited Kingdom

In situ low-voltage aberration corrected transmission electron microscopy(TEM)observations of the dynamic entrapment of a C_(60) molecule in the saddle of a bent double-walled carbon nanotube is *** fullerene interaction is non-covalent,suggesting that enhancedπ-πinteractions(van der Waals forces)are *** molecular dynamics calculations confirm that the increased interaction area associated with a buckle is sufficient to trap a ***,they show hopping behavior in agreement with our experimental *** findings further our understanding of carbon nanostructure interactions,which are important in the rapidly developing field of low-voltage aberration corrected TEM and nano-carbon device fabrication.

关键词： Carbon nanotubes fullerenes low-voltage transmission electron microscopy molecule trap

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High-performance electronics and optoelectronics of monolayer tungsten diselenide full film from pre-seeding strategy

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InfoMat 2021年第12期3卷 1455-1469页

作者： Shu Zhang Jinbo Pang Qilin Cheng Feng Yang Yu Chen Yu Liu Yufen Li thomas gemming Xiaoyan Liu Bergoi Ibarlucea Jiali Yang Hong Liu Weijia Zhou Gianaurelio Cuniberti Mark H.Rümmeli Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong Institute for Advanced Interdisciplinary Research(iAIR)University of JinanJinanChina School of Chemistry and Chemical Engineering University of JinanJinanChina Department of Chemistry Southern University of Science and TechnologyShenzhenChina Institute of High Energy Physics Chinese Academy of SciencesBeijingChina College of Energy Soochow Institute for Energy and Materials InnovationsSoochow UniversitySuzhouChina Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow UniversitySuzhouChina Institute for Complex Materials Leibniz Institute for Solid State and Materials Research DresdenDresdenGermany Institute for Materials Science and Max Bergmann Center of Biomaterials Technische Universität DresdenDresdenGermany Center for Advancing Electronics Dresden Technische Universität DresdenDresdenGermany State Key Laboratory of Crystal Materials Center of Bio&Micro/Nano Functional MaterialsShandong UniversityJinanChina Dresden Center for Computational Materials Science Technische Universität DresdenDresdenGermany Dresden Center for Intelligent Materials(GCL DCIM) Technische Universität DresdenDresdenGermany Centre of Polymer and Carbon Materials Polish Academy of SciencesZabrzePoland Institute for Complex Materials IFW DresdenDresdenGermany Institute of Environmental Technology(CEET) VŠB-Technical University of OstravaOstravaCzech Republi

Tungsten diselenide (WSe2) possesses extraordinary electronic properties forapplications in electronics, optoelectronics, and emerging exciton physics. Thesynthesis of monolayer WSe2 film is of topmost for device arrays and integratedcircuits. The monolayer WSe2 film has yet been reported by thermal chemicalvapor deposition (CVD) approach, and the nucleation mechanism remainsunclear. Here, we report a pre-seeding strategy for finely regulating the nucleidensity at an early stage and achieving a fully covered film after chemicalvapor deposition growth. The underlying mechanism is heterogeneous nucle-ation from the pre-seeding tungsten oxide nanoparticles. At first, we optimized the precursor concentration for pre-seeding. Besides, we confirmed the superi-ority of the pre-seeding method, compared with three types of substrate pre-treatments, including nontreatment, sonication in an organic solvent, andoxygen plasma. Eventually, the high-quality synthetic WSe2 monolayer filmexhibits excellent device performance in field-effect transistors and photodetec-tors. We extracted thermodynamic activation energy from the nucleation andgrowth data. Our results may shed light on the wafer-scale production ofhomogeneous monolayer films of WSe2, other 2D materials, and their van derWaals heterostructures.

关键词： activation energy chemical vapor deposition field-effect transistor pre-seeding thermodynamics tungsten diselenide

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悬浮于石墨烯空位/孔洞中的独立纳米结构

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Science China Materials 2023年第1期66卷 35-50页

作者：刘玉 Huy Q Ta 杨晓琴张月周军华施启涛曾梦琪 thomas gemming Barbara Trzebicka 付磊 Mark H.Rümmeli Soochow Institute for Energy and Materials Innovations College of PhysicsOptoelectronics and EnergyCollaborative Innovation Center of Suzhou Nano Science and TechnologyKey Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215006China IFW Dresden P.O.Box D-01171 DresdenGermany Gusu Laboratory of Materials Suzhou 215123China Leibniz Institute for Solid State and Materials Research Dresden P.O.Box 270116D-01171 DresdenGermany Centre of Polymer and Carbon Materials Polish Academy of SciencesM.Curie-Sklodowskiej 34Zabrze 41-819Poland Institute of Environmental Technology VSB-Technical University of Ostrava17.Listopadu 15Ostrava70833Czech Republic College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072China

在电子束辐照下,石墨烯较易形成空位、孔洞等缺陷,从而捕获外来原子,形成新的结构.由于这些结构具有一些令人兴奋的性质,它们和石墨烯之间的相互作用引起了科研工作者相当大的研究兴趣.本文总结了利用透射电子显微镜在制备和表征悬浮在... 详细信息

在电子束辐照下,石墨烯较易形成空位、孔洞等缺陷,从而捕获外来原子,形成新的结构.由于这些结构具有一些令人兴奋的性质,它们和石墨烯之间的相互作用引起了科研工作者相当大的研究兴趣.本文总结了利用透射电子显微镜在制备和表征悬浮在石墨烯中的独立纳米结构的方法,以及原子分辨率下观察到的此类材料中原子/结构的动态行为过程,讨论了新型金属/非金属掺杂剂对具有不同键结构的石墨烯空位的影响,以及位于石墨烯边缘的单原子/团簇的催化活性.此外,还讨论了独立单原子厚二维团簇/金属/金属烯和二维团簇/金属/金属烯氧化物的动态形成过程.并指出这些纳米结构的形成、稳定性和宏观效应对于新的原子/分子尺度纳米技术的实际应用至关重要.以上数据证实了新型纳米结构的数量不断增加,并预示着相关研究的不断深入.

关键词：纳米结构透射电子显微镜纳米技术键结构石墨烯单原子电子束辐照分子尺度

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