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Instrumental requirements for the detection of electron beam-induced object excitations at the single atom level in high-resolution transmission electron microscopy
Affiliation:1. National Center for Electron Microscopy and Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USA;2. Department of Material Science & Engineering, University of California – Berkeley, Berkeley, CA 94720, USA;3. Material Sciences Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USA;4. Dept. Fisica, ESFM-IPN, Mexico, DF 07300, Mexico;5. The DOW Chemical Company, Midland, MI 48667, USA;1. GEROM Groupe Etudes Remodelage Osseux et bioMatériaux, LUNAM Université, IRIS-IBS Institut de Biologie en Santé, CHU d‘Angers, 49933 Angers Cedex, France;2. UPSP “Biologie et Biomatériaux du Tissus Osseux – Chirurgie Expérimentale”, ONIRIS – National Veterinary School of Nantes, LUNAM Université, Route de Gâchet, BP 44706, F44307 Nantes cedex 03, France;3. Service de Rhumatologie, CHU d‘Angers, 49933 Angers Cedex, France;1. Shanghai Key Laboratory of Advanced High Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. Canadian Centre of Electron Microscopy and Department of Materials Science and Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada
Abstract:This contribution touches on essential requirements for instrument stability and resolution that allows operating advanced electron microscopes at the edge to technological capabilities. They enable the detection of single atoms and their dynamic behavior on a length scale of picometers in real time. It is understood that the observed atom dynamic is intimately linked to the relaxation and thermalization of electron beam-induced sample excitation. Resulting contrast fluctuations are beam current dependent and largely contribute to a contrast mismatch between experiments and theory if not considered. If explored, they open the possibility to study functional behavior of nanocrystals and single molecules at the atomic level in real time.
Keywords:TEM  Single atom sensitivity  Low dose imaging  Aberration-correction  Catalysis  Functionality
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