Imaging atomic-scale chemistry from fused multi-modal electron microscopy  

作　　者：Jonathan Schwartz Zichao Wendy Di Yi Jiang Alyssa J.Fielitz Don-Hyung Ha Sanjaya D.Perera Ismail El Baggari Richard D.Robinson Jeffrey A.Fessler Colin Ophus Steve Rozeveld Robert Hovden 

机构地区：[1]Department of Materials Science and Engineering,University of Michigan,Ann Arbor,MI,USA [2]Mathematics and Computer Science Division,Argonne National Laboratory,Lemont,IL,USA [3]Advanced Photon Source Facility,Argonne National Laboratory,Lemont,IL,USA [4]Dow Chemical Co.,Midland,MI,USA [5]Department of Material Science and Engineering,Cornell University,Ithaca,New York,USA [6]School of Integrative Engineering,Chung-Ang University,Seoul,Republic of Korea [7]Department of Physics,Cornell University,Ithaca,NY,USA [8]The Rowland Institute at Harvard,Cambridge,MA,USA [9]Department of Electrical Engineering and Computer Science,University of Michigan,Ann Arbor,MI,USA [10]National Center for Electron Microscopy,Lawrence Berkeley National Laboratory,Molecular Foundry,Berkeley,CA,USA [11]Applied Physics Program,University of MIchigan,Ann Arbor,MI,United States

出　　处：《npj Computational Materials》2022年第1期164-171,共8页计算材料学（英文）

基　　金：R.H.and J.S.acknowledge support from the Army Research Office,Computing Sciences(W911NF-17-S-0002)and Dow Chemical Company;Work at the Molecular Foundry was supported by the Office of Basic Energy Sciences,of the U.S.Department of Energy under Contract no.DE-AC02-05CH11231.

摘　　要：Efforts to map atomic-scale chemistry at low doses with minimal noise using electron microscopes are fundamentally limited by inelastic interactions.Here,fused multi-modal electron microscopy offers high signal-to-noise ratio(SNR)recovery of material chemistry at nano-and atomic-resolution by coupling correlated information encoded within both elastic scattering(high-angle annular dark-field(HAADF))and inelastic spectroscopic signals(electron energy loss(EELS)or energy-dispersive x-ray(EDX)).By linking these simultaneously acquired signals,or modalities,the chemical distribution within nanomaterials can be imaged at significantly lower doses with existing detector hardware.In many cases,the dose requirements can be reduced by over one order of magnitude.This high SNR recovery of chemistry is tested against simulated and experimental atomic resolution data of heterogeneous nanomaterials.

关 键 词：MATERIALS CHEMISTRY FUSED 

分 类 号：O57[理学—粒子物理与原子核物理]