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Title: Atom Probe Tomography Analysis of Ag Doping in 2D Layered Material (PbSe) 5(Bi 2Se 3) 3

Impurity doping in two-dimensional (2D) materials can provide a route to tuning electronic properties, so it is important to be able to determine the distribution of dopant atoms within and between layers. Here we report the totnographic mapping of dopants in layered 2D materials with atomic sensitivity and subnanometer spatial resolution using atom, probe tomography (APT). Also, APT analysis shows that Ag dopes both Bi 2Se 3 and PbSe layers in (PbSe) 5(Bi 2Se 3) 3, and correlations :in the position of Ag atoms suggest a pairing across neighboring Bi 2Se 3 and PbSe layers. Finally, density functional theory (DFT) calculations confirm the favorability of substitutional-doping for both Pb and Bi and provide insights into the,observed spatial correlations in dopant locations.
 [1] ;  [2] ;  [3] ;  [3] ;  [2] ;  [2] ;  [1]
  1. Northwestern Univ., Evanston, IL (United States). Department of Materials Science and Engineering
  2. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Materials Science and Engineering Division
  3. Northwestern Univ., Evanston, IL (United States). Department of Chemistry; Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 16; Journal Issue: 10; Journal ID: ISSN 1530-6984
American Chemical Society
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC); National Institute of Standards and Technology (NIST); National Science Foundation (NSF)
Country of Publication:
United States
36 MATERIALS SCIENCE; 2D materials; DFT; atom probe tomography; doping; materials genome initiative
OSTI Identifier: