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Proposition of atomic and close-to-atomic scale manufacturing

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Advances in Manufacturing 2024年第1期12卷 1-5页

作者： Ju‑Fan Zhang Jens Ducree School of Mechanical and Materials Engineering University College DublinDublin 4Ireland School of Physical Sciences Dublin City UniversityDublinIreland

atomic and close-to-atomic scale manufacturing(ACSM)is the core competence of Manufacturing *** other conceptions or terminologies that only focus on the atomic level precision,ACSM defnes a new realm of manufacturing where quantum mechanics plays the dominant role in the atom/molecule addition,migration and removal,considering the uncertainty principle and the discrete nature of *** ACSM is still in its infant stage,only little has been systematically elaborated at the core proposition of ACSM by now,hence there is a need to understand its concept and *** article elucidates the development of ACSM and clarifes its proposition,which aims to achieve a clearer understanding on ACSM and direct more efective eforts toward this promising area.

关键词： atomic and close-to-atomic scale manufacturing(ACSM) atomic Precision Manufacturing Paradigm Manufacturing III

Experimental reconstructions of 3D atomic structures from electron microscopy images using a Bayesian genetic algorithm

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npj Computational Materials 2022年第1期8卷 2076-2083页

作者： Annick De Backer Sandra Van Aert Christel Faes Ece Arslan Irmak Peter DNellist Lewys Jones EMAT University of AntwerpGroenenborgerlaan 1712020AntwerpBelgium NANOlab Center of Excellence University of AntwerpGroenenborgerlaan 1712020AntwerpBelgium I-BioStat Data Science InstituteHasselt UniversityHasseltBelgium Department of Materials University of OxfordParks RoadOX13PHOxfordUK Advanced Microscopy Laboratory Centre for Research on Adaptive Nanostructures and Nanodevices(CRANN)Dublin 2Ireland School of Physics Trinity College DublinThe University of DublinDublin 2Ireland

We introduce a Bayesian genetic algorithm for reconstructing atomic models of monotype crystalline nanoparticles from a single projection using Z-contrast *** number of atoms in a projected atomic column obtained from annular dark field scanning transmission electron microscopy images serves as an input for the initial three-dimensional *** algorithm minimizes the energy of the structure while utilizing a priori information about the finite precision of the atom-counting results and neighbor-mass *** results show promising prospects for obtaining reliable reconstructions of beam-sensitive nanoparticles during dynamical processes from images acquired with sufficiently low incident electron doses.

关键词： algorithm atomic utilizing

New opportunities for nuclear and atomic physics on the femto-to nanometer scale with ultra-high-intensity lasers

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Matter and Radiation at Extremes 2022年第2期7卷 1-7页

作者： Changbo Fu Guoqiang Zhang Yugang Ma Key Laboratory of Nuclear Physics and Ion-Beam Application(MoE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China

There are a number of puzzles concerning physics on the scale of nanometers to femtometers,including the neutron lifetime,the proton charge radius,and the possible existence of the deep Dirac *** the development of high-intensity laser technology,lasers today can induce extremely strong electromagnetic *** in the deep shells of atoms as well as the atomic nucleus itself can be affected by these *** may provide a new experimental platform for studies of physical processes on the femto-to nanometer scale,where atomic physics and nuclear physics *** this paper,we review possible new opportunities for studying puzzles on the femto-to nanometer scale using highintensity lasers.

关键词： intensity atomic shells

Machine-learning atomic simulation for heterogeneous catalysis

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npj Computational Materials 2023年第1期9卷 2333-2341页

作者： Dongxiao Chen Cheng Shang Zhi-Pan Liu Collaborative Innovation Center of Chemistry for Energy Materials(iChEM) Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsKey Laboratory of Computational Physical ScienceDepartment of ChemistryFudan UniversityShanghai 200433China Shanghai Qi Zhi Institution Shanghai 200030China Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

Heterogeneous catalysis is at the heart of *** theoretical methods based on machine learning(ML)techniques that emerged in recent years provide a new avenue to disclose the structures and reaction in complex catalytic *** we review briefly the history of atomic simulations in catalysis and then focus on the recent trend shifting toward ML potential *** advanced methods developed by our group are outlined to illustrate how complex structures and reaction networks can be resolved using the ML potential in combination with efficient global optimization *** future of atomic simulation in catalysis is outlooked.

关键词： methods catalysis atomic

atomic Crosschain Transactions for Ethereum Private Sidechains

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Blockchain(Research and Applications) 2022年第1期3卷 23-39页

作者： Peter Robinson Raghavendra Ramesh Sandra Johnson ConsenSys Software R&D Brisbane4520Australia School of Information Technology and Electrical Engineering The University of QueenslandQueensland 4072Australia ARC Centre of Excellence for Mathematical and Statistical Frontiers(ACEMS) Queensland University of TechnologyQueensland 4001Australia

The atomic Crosschain Transaction for Ethereum Private Sidechains protocol allows composable programming across permissioned Ethereum *** allows for inter-contract and inter-blockchain function calls that are both synchronous and atomic:if one part fails,the whole call tree of function calls is *** protocol is not based on existing techniques such as Hash Time Locked Contracts,relay chains,block header transfer,or trusted *** uses(a)threshold signatures to prove values across blockchains,(b)coordination contracts to manage the state of crosschain transactions,and(c)a function call tree commitment scheme to allow users to commit to a call tree and then later check that the correct function calls have been *** paper analyses the processing overhead of using this technique compared to using multiple standard non-atomic single blockchain *** additional processing is analysed for four scenarios involving multiple blockchains:a Trade–Finance system,the Hotel–Train problem,a Supply Chain with Provenance,and an *** protocol is shown to have both safety and liveness properties.

关键词： Crosschain Blockchain Transaction atomic Ethereum

Collagen membrane functionalized with magnesium oxide via room-temperature atomic layer deposition promotes osteopromotive and antimicrobial properties

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Bioactive Materials 2023年第12期30卷 46-61页

作者： Soumya Saha Raphael Cavalcante Costa Mirela Caroline Silva Joao Matheus Fonseca-Santos Lin Chen Abhijit H.Phakatkar Harshdeep Bhatia Leonardo P.Faverani Valentim A.R.Barao Tolou Shokuhfar Cortino Sukotjo Christos Takoudis Department of Biomedical Engineering University of Illinois ChicagoChicagoUSA Department of Prosthodontics and Periodontology Piracicaba Dental SchoolUniversity of Campinas(UNICAMP)PiracicabaSao PauloBrazil Department of Diagnosis and Surgery Division of Oral and Maxillofacial Surgery and ImplantologySao Paulo State University(UNESP)School of DentistryAraçatubaSao PauloBrazil Department of Periodontics Center for Wound Healing and Tissue RegenerationCollege of DentistryUniversity of Illinois ChicagoChicagoUSA Department of Chemical Engineering University of Illinois ChicagoChicagoUSA Department of Restorative Dentistry University of Illinois Chicago College of DentistryChicagoUSA

Artificial bone grafting materials such as collagen are gaining interest due to the ease of production and ***,collagen must be supplemented with additional coating materials for improved ***,we report room-temperature atomic layer deposition(ALD)of MgO,a novel method to coat collagen membranes with *** techniques such as X-ray photoelectron spectroscopy,Raman spectroscopy,and electron beam dispersion mapping confirm the chemical nature of the *** electron and atomic force microscopies show the surface topography and morphology of the collagen fibers were not altered during the ALD of *** release of magnesium ions promotes bone growth,and we show the deposited MgO film leaches trace amounts of Mg when incubated in phosphate-buffered saline at 37◦*** coated collagen membrane had a superhydrophilic surface immediately after the deposition of *** film was not toxic to human cells and demonstrated antibacterial properties against bacterial ***,in vivo studies performed on calvaria rats showed MgO-coated membranes(200 and 500 ALD)elicit a higher inflammatory response,leading to an increase in angiogenesis and a greater bone formation,mainly for Col-MgO500,compared to uncoated *** on the characterization of the MgO film and in vitro and in vivo data,the MgO-coated collagen membranes are excellent candidates for guided bone regeneration.

关键词： coating magnesium atomic

atomic Layer Deposition-Assisted Construction of Binder-Free Ni@N-Doped Carbon Nanospheres Films as Advanced Host for Sulfur Cathode

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Nano-Micro Letters 2019年第4期11卷 147-160页

作者： Jun Liu Aixiang Wei Guoxiang Pan Qinqin Xiong Fang Chen Shenghui Shen Xinhui Xia Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006People’s Republic of China Department of Information Science Xinhua College of Sun Yat-sen UniversityGuangzhou 510520People’s Republic of China Department of Materials Chemistry Huzhou UniversityHuzhou 313000People’s Republic of China College of Materials and Environmental Engineering Hangzhou Dianzi UniversityHangzhou 310018People’s Republic of China Department of Chemistry Zhejiang UniversityHangzhou 310027People’s Republic of China State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Provinceand Department of Materials Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071People’s Republic of China

Rational design of hybrid carbon host with high electrical conductivity and strong adsorption toward soluble lithium polysulfides is the main challenge for achieving high-performance lithium-sulfur batteries(LSBs).Herein,novel binder-free Ni@N-doped carbon nanospheres(N-CNSs)films as sulfur host are firstly synthesized via a facile combined hydrothermal-atomic layer deposition *** cross-linked multilayer N-CNSs films can effectively enhance the electrical conductivity of electrode and provide physical blocking“dams”toward the soluble long-chain ***,the doped N heteroatoms and superficial NiO layer on Ni layer can work synergistically to suppress the shuttle of lithium polysulfides by effective chemical interaction/*** virtue of the unique composite architecture and reinforced dual physical and chemical adsorption to the soluble polysulfides,the obtained Ni@N-CNSs/S electrode is demonstrated with enhanced rate performance(816 mAh g?1 at 2 C)and excellent long cycling life(87%after 200 cycles at 0.1 C),much better than N-CNSs/S electrode and other carbon/S *** proposed design strategy offers a promising prospect for construction of advanced sulfur cathodes for applications in LSBs and other energy storage systems.

关键词： atomic layer deposition Nickel N-doped carbon nanospheres Sulfur cathode Lithium-sulfur batteries

atomic Structure of Cu49Hf42Al9 Metallic Glass with High Glass-Forming Ability and Plasticity

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Acta Metallurgica Sinica(English Letters) 2019年第7期32卷 803-807页

作者： Kai Li Yu-Jen Chou Fang-Liang Gao Guo-Qiang Li State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China Engineering Research Center on Solid-State Lighting and Its Informationisation of Guangdong Province South China University of Technology Guangzhou 510640 China Department of Electronic Materials School of Materials Science and Engineering South China University of Technology Guangzhou 510640 China Department of Materials University of Oxford Parks Road Oxford OXI 3PH UK

Electron diffraction was used to study the local atomic structure of Cu49Hf42Al9 metallic glasses (MGs). The amorphous nature of the MG was fully retained after the compression test. The partial radial distribution functions (PRDFs) of the MG structure obtained from the atomic model using reverse Monte Carlo and density functional theory optimization display that the peaks of the first nearest-neighbour distances for Cu-Cu, Hf-Cu and Hf-Hf atomic pairs were located at 2.56 A, 2.78 A and 3.23 A, respectively. The wide distribution of PRDF for Hf-Hf atomic pair explained the high plasticity of the material.

关键词： Metallic glass Radial distribution function Electron diffraction Density functional theory atomic structure

atomic Aggregation Processes in the Early Stages of Pt/Pt(111)Growth

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Chinese Physics Letters 2000年第8期17卷 589-591页

作者：庄国策朱晓斌王炜 National Laboratory of Solid State Microstructure and Department of Physics Nanjing UniversityNanjing 210093 Department of Physics Yancheng Teacher's CollegeYanchengJiangsu 224002

The atomic aggregation processes in the early stages of Pt/Pt(111)growth are studied by using kinetic Monte Carlo *** results show that the average neighbor coordination number of the atoms in a cluster is a function of temperature,agreeing well with the experiment observations of scanning tunneling *** influence of diffusion barriers of various atomic processes on the morphology of islands is also *** morphologies of the islands(dendritic,fractal,or compact islands)are found.

关键词： fractal atomic tunneling