检索结果-南通市图书馆

Disentangling multiple scattering with deep learning:application to strain mapping from electron diffraction patterns

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

npj Computational Materials 2022年第1期8卷 2419-2433页

作者： Joydeep Munshi Alexander Rakowski Benjamin H.Savitzky Steven E.Zeltmann Jim Ciston Matthew Henderson Shreyas Cholia Andrew M.Minor Maria K.Y.Chan Colin Ophus center for Nanoscale Materials Argonne National LaboratoryArgonne DrWoodridge60517ILUSA national center for electron microscopy Molecular FoundryLawrence Berkeley National Laboratory1 Cyclotron RoadBerkeley94720CAUSA Department of Materials Science and Engineering University of California BerkeleyBerkeley94720CAUSA Scientific Data Division Lawrence Berkeley National Laboratory1 Cyclotron RoadBerkeley94720CAUSA

A fast,robust pipeline for strain mapping of crystalline materials is important for many technological *** electron nanodiffraction allows us to calculate strain maps with high accuracy and spatial resolutions,but this technique is limited when the electron beam undergoes multiple ***-learning methods have the potential to invert these complex signals,but require a large number of training *** implement a Fourier space,complex-valued deep-neural network,FCU-Net,to invert highly nonlinear electron diffraction patterns into the corresponding quantitative structure factor ***-Net was trained using over 200,000 unique simulated dynamical diffraction patterns from different combinations of crystal structures,orientations,thicknesses,and microscope parameters,which are augmented with experimental *** evaluated FCU-Net against simulated and experimental datasets,where it substantially outperforms conventional analysis *** code,models,and training library are open-source and may be adapted to different diffraction measurement problems.

关键词： valued adapted crystalline

High efficiency monobasal solid-state dye-sensitized solar cell with mesoporous TiO2 beads as photoanode

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Optoelectronics 2013年第4期6卷 413-417页

作者： Heng WANG Peng XIANG Mi XU Guanghui LIU Xiong LI Zhiliang KU Yaoguang RONG Linfeng LIU Min HU Ying YANG Hongwei HAN Michael Gr~itzel center for Mesoscopic Solar Cells Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China

A monobasal solid-state dye-sensitized solar cell （ssDSC） with mesoporous TiO2 beads was developed and an efficiency of 4% was achieved under air mass （AM） 1.5 illumination. Scattering properties and electron diffu- sion coefficients ofTiO2 mesoporous beads and P25 nano- particles were investigated. The results show that TiO2 mesoporous beads display higher scatterance than P25 nano-particles, and TiO2 mesoporous beads have higher electron diffusion coefficients （2.86 × 10 5 cm^2·s^-1） than P25 nano-particles （2.26 × 10 5 cm^2·s^-1）.

关键词： dye-sensitized solar cells (DSCs) mesoporousbeads scattering electron diffusion coefficients

Microfungi on Tectona grandis(teak)in Northern Thailand

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fungal Diversity 2017年第1期82卷 107-182页

作者： Mingkwan Doilom Asha J.Dissanayake Dhanushka N.Wanasinghe Saranyaphat Boonmee Jian-Kui Liu D.Jayarama Bhat Joanne E.Taylor Ali.H.Bahkali Eric H.C.McKenzie Kevin D.Hyde Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of Sciences132 Lanhei RoadKunming 650201China center of Excellence in Fungal Research Mae Fah Luang UniversityChiang Rai 57100Thailand School of Science Mae Fah Luang UniversityChiang Rai 57100Thailand Institute of Plant and Environment Protection Beijing Academy of Agriculture and Forestry SciencesNo.9 of Shu Guang Hua Yuan Zhong LuHaidian DistrictBeijing 10097China Guizhou Key Laboratory of Agricultural Biotechnology Guizhou Academy of Agricultural SciencesGuiyang 550006GuizhouChina Formerly Department of Botany Goa UniversityTaleigãoGoaIndia No.128/1-J Azad Housing SocietyCurcaGoa VelhaIndia Royal Botanic Garden Edinburgh 20A Inverleith RowEdinburgh EH35LRUK Department of Botany and Microbiology College of ScienceKing Saud UniversityP.O.Box 2455Riyadh 1145Saudi Arabia Manaaki Whenua Landcare Research Private Bag 92170AucklandNew Zealand

To date there is virtually no information available concerning the fungi associated with Tectona grandis(teak)(Lamiaceae)in *** this study,samples of microfungi were collected from both asymptomatic stems and dead wood,and symptomatic branches,stem and leaves of *** 27 sites in six provinces(Chiang Mai,Chiang Rai,Phayao,Phitsanulok,Phrae and Uttaradit Provinces).Morphology and combined multi-gene phylogeny(CAL,GAPDH,ITS,LSU,RPB2,SSU,TEF1 and TUB)were used to identify taxa.A total of 270 collections,representing 28 fungal species residing in 12 families,7 orders and 21 genera,with three species of uncertain taxonomic placement were *** these,one family,three genera and 14 species are new to *** new family,Pseudocoleodictyosporaceae is introduced based on its distinct lineage in the Dothideomycetes and its unique morphology as compared to Roussoellaceae and *** new genera are Neooccultibambusa,Pseudocoleodictyospora and *** newly described species are Diaporthe neoraonikayaporum,***,***,***,Hermatomyces tectonae,***,Manoharachariella tectonae,Neooccultibambusa chiangraiensis,Pseudocoleodictyospora sukhothaiensis,***,***,Rhytidhysteron tectonae,Subglobosporium tectonae and Tubeufia *** species are known published taxa including Alternaria tillandsiae,Berkleasmium talaumae,Boerlagiomyces macrospora,Ceratocladium purpureogriseum,Fusarium solani,Helicoma siamense,Lasiodiplodia theobromae,Macrovalsaria megalospora,Paradictyoarthrinium diffractum,Phaeoacremonium italicum,Sphaeropsis eucalypticola,Stachybotrys levispora,*** and Thaxteriellopsis *** or reference specimens are designated for Boerlagiomyces macrospora and Macrovalsaria *** megalospora is transferred from Botryosphaeriaceae to Dothideomycetes genus,incertae sedis based on taxonomy and phylogenetic analysis,which indicate i

关键词： Ascomycota Basidiomycota Dothideomycetes Sordariomycetes Taxonomy Multi-gene phylogenetics

In-situ growth of low-dimensional perovskite-based insular nanocrystals for highly efficient light emitting diodes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2023年第3期12卷 446-455页

作者： Hao Wang Weidong Xu Qi Wei Si Peng Yuequn Shang Xianyuan Jiang Danni Yu Kai Wang Ruihua Pu Chenxi Zhao Zihao Zang Hansheng Li Yile Zhang Ting Pan Zijian Peng Xiaoqin Shen Shengjie Ling Weimin Liu Feng Gao Zhijun Ning School of Physical Science and Technology Shanghai Key Laboratory of High-resolution Electron MicroscopyShanghaiTech UniversityShanghaiChina Institute of Flexible electronics Northwestern Polytechnical UniversityXi’anChina Department of Physics Chemistry and Biology(IFM)Linköping UniversityLinköpingSweden

Regulation of perovskite growth plays a critical role in the development of high-performance optoelectronic ***,judicious control of the grain growth for perovskite light emitting diodes is elusive due to its multiple requirements in terms of morphology,composition,and ***,we demonstrate a supramolecular dynamic coordination strategy to regulate perovskite *** combined use of crown ether and sodium trifluoroacetate can coordinate with A site and B site cations in ABX_(3) perovskite,*** formation of supramolecular structure retard perovskite nucleation,while the transformation of supramolecular intermediate structure enables the release of components for slow perovskite *** judicious control enables a segmented growth,inducing the growth of insular nanocrystal consist of low-dimensional *** emitting diode based on this perovskite film eventually brings a peak external quantum efficiency up to 23.9%,ranking among the highest efficiency *** homogeneous nano-island structure also enables high-efficiency large area(1 cm^(2))device up to 21.6%,and a record high value of 13.6%for highly semi-transparent ones.

关键词： structure perovskite enable

Ultrafast Preparation of Nonequilibrium FeNi Spinels by Magnetic Induction Heating for Unprecedented Oxygen Evolution Electrocatalysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research 2022年第4期2022卷 165-177页

作者： Bingzhang Lu Qiming Liu Chunyang Wang Zaheer Masood David J.Morris Forrest Nichols Rene Mercado Peng Zhang Qingfeng Ge Huolin L.Xin Shaowei Chen Department of Chemistry and Biochemistry University of California1156 High StretSanta CruzCalifornia 95064USA Department of Physics and Astronomy University of CaliforniaIrvineCalifornia 92697USA Department of Chemistry and Biochemistry Southern Ilinois UniversityCarbondaleIlinois 62901USA Department of Chemistry Dalhousie University6274 Coburg RoadHalifaxNSCanada B3H 4R2

Carbon-supported nanocomposites are attracting particular attention as high-performance,low-cost electrocatalysts for electrochemical water *** are mostly prepared by pyrolysis and hydrothermal procedures that are time-consuming(from hours to days)and typically difficult to produce a nonequilibrium ***,for the first time ever,we exploit magnetic induction heating-quenching for ultrafast production of carbon-FeNi spinel oxide nanocomposites(within seconds),which exhibit an unprecedentedly high performance towards oxygen evolution reaction(OER),with an ultralow overpotential of only+260 mV to reach the high current density of 100 mA cm^(-2).Experimental and theoretical studies show that the rapid heating and quenching process(ca.10^(3)K s^(-1))impedes the Ni and Fe phase segregation and produces a Cl-rich surface,both contributing to the remarkable catalytic *** from this study highlight the unique advantage of ultrafast heating/quenching in the structural engineering of functional nanocomposites to achieve high electrocatalytic performance towards important electrochemical reactions.

关键词： quenching Oxygen attracting

Laser synthesis and functionalization of nanostructures

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Extreme Manufacturing 2019年第1期1卷 38-50页

作者： Costas P Grigoropoulos Laser Thermal Laboratory Department of Mechanical EngineeringUniversity of California at Berkeley6129 Etcheverry HallBerkeley CA 94720-1740United States of America

This article summarizes work at the Laser Thermal Laboratory and discusses related studies on the laser synthesis and functionalization of semiconductor nanostructures and two-dimensional(2D)semiconductor *** has been carried out on the laser-induced crystallization of thin films and *** in situ transmission electron microscopy(TEM)monitoring of the crystallization of amorphous precursors in nanodomains is discussed *** directed assembly of silicon nanoparticles and the modulation of their optical properties by phase switching is *** vapor-liquid-solid mechanism has been adopted as a bottom-up approach in the synthesis of semiconducting nanowires(NWs).In contrast to furnace heating methods,laser irradiation offers high spatial selectivity and precise control of the heating mechanism in the time *** attributes enabled the investigation of NW nucleation and the early stage of nanostructure ***-and shape-selective,on-demand direct integration of oriented NWs was *** of discrete silicon NWs with nanoscale location selectivity by employing near-field laser illumination is also reported *** the properties of 2D transition metal dichalcogenides(TMDCs)by modulating the free carrier type,density,and composition can offer an exciting new pathway to various practical nanoscale *** situ Raman probing of laser-induced processing of TMDC flakes was conducted in a TEM instrument.

关键词： laser nanofabrication laser crystallization nanowire growth near field scanning optical microscopy transition metal dichalcogenides

Defect-Rich,Candied Haws-Shaped AuPtNi Alloy Nanostructures for Highly Efficient Electrocatalysis

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

CCS Chemistry 2020年第1期2卷 24-30页

作者： Xiaoya Cui Zhicheng Zhang Yue Gong Faisal Saleem Bo Chen Yonghua Du Zhuangchai Lai Nailiang Yang Bing Li Lin Gu Hua Zhang Department of Chemistry City University of Hong KongHong KongChina center for Programmable Materials School of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore Beijing national Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190ChinaSchool of Physical SciencesUniversity of Chinese Academy of SciencesBeijing 100049China national Synchrotron Light Source II Brookhaven National LaboratoryUpton 11973NYUSA State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of Sciences Beijing 100190China Institute of Materials Research and Engineering(IMRE) A*STAR(Agency for ScienceTechnology and Research)Singapore 138634Singapore

The rational design and synthesis of multimetallic nanostructures(NSs)with rich defects are of significant importance for their diverse applications,including their promising usage as high-efficiency catalysts for alcohol oxidation reaction as a fuel ***,we report the synthesis of defect-rich,candied haws-shaped AuPtNi NSs using presynthesized gold(Au)nanowires as *** ternary AuPtNi NSs possess rich defects such as twins,stacking faults,and atomic ***,the AuPtNi NSs exhibited excellent mass and specific activities toward methanol and ethanol oxidation reactions under acidic *** current work paves the way for the rational design and controlled synthesis of defect-rich multimetallic NSs to boost their performances in catalytic reactions.

关键词： noble metal alloy multimetallic nanostructure defect electrocatalysis

A General Method for the Synthesis of Hybrid Nanostructures Using MoSe_(2) Nanosheet-Assembled Nanospheres as Templates

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research 2019年第1期2019卷 167-176页

作者： Shikui Han Kai Zhou Yifu Yu Chaoliang Tan Junze Chen Ying Huang Qinglang Ma Ye Chen Hongfei Cheng Weijia Zhou Hua Zhang Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical EngineeringHefei University of TechnologyHefei 230009China center for Programmable Materials School of Materials Science and EngineeringNanyang Technological University50 Nanyang AvenueSingapore 639798 center for Advanced Analytical Science School of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou 510006China New Energy Research Institute School of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006China Department of Chemistry City University of Hong KongTat Chee AvenueKowloonHong Kong

The layered transition metal dichalcogenides(TMDs)and transition metal phosphides are low-cost,earth-abundant,and robust electrocatalysts for hydrogen evolution reaction(HER).Integrating them into hybrid nanostructures is potentially promising to further boost the catalytic activity toward HER based on their synergistic ***,we report a general method for the synthesis of a series of MoSe_(2)-based hybrid nanostructures,including MoSe_(2)-Ni_(2)P,MoSe_(2)-Co_(2)P,MoSe_(2)-Ni,MoSe_(2)-Co,and MoSe_(2)-NiS,by postgrowth of Ni_(2)P,Co_(2)P,Ni,Co,and NiS nanostructures on the presynthesized MoSe_(2) nanosheet-assembled nanospheres,respectively,via a colloidal synthesis *** a proof-of-concept application,the as-synthesized hybrid nanostructures are used as electrocatalysts for HER,exhibiting high activity and stability in acidic *** them,the MoSe_(2)-Co_(2)P composite shows the highest HER activity with an overpotential of 167 mV at 10 mA cm^(-2).

关键词： method spheres synthesis