Atomic resolved phase map of monolayer MoS2 retrieved by spherical aberration-corrected transport of intensity equation

Xiaobin Zhang, Yoshifumi Oshima

研究成果: Article

抄録

An atomic resolution phase map,which enables us to observe charge distribution or magnetic properties at an atomic scale,has been pointed out to be retrieved by transport of intensity equation (TIE) when taking two atomic-resolved transmission electron microscope (TEM) images of small defocus difference. In this work,we firstly obtained the atomic-resolved phase maps of an exfoliated molybdenum disulfide sheet using spherical aberration-corrected transmission electron microscope. We successfully observed 60° grain boundary of mechanically exfoliated monolayer molybdenum disulfide sheet. The relative phase shift of a single molybdenum atomic column to the column consisting of two sulfur atoms was obtained to be about 0.01 rad on average,which was about half lower than the simulated TIE phase map,indicating that the individual atomic sites can be distinguished qualitatively. The appropriate condition for retrieving atomic-resolved TIE phase maps was briefly discussed.

元の言語English
ページ(範囲)422-428
ページ数7
ジャーナルMicroscopy
65
発行部数5
DOI
出版物ステータスPublished - 2016 10 1
外部発表Yes

Fingerprint

Aberrations
aberration
Monolayers
Molybdenum
molybdenum disulfides
Electron microscopes
electron microscopes
distribution (property)
Charge distribution
Phase shift
charge distribution
molybdenum
Magnetic properties
Grain boundaries
phase shift
sulfur
Sulfur
grain boundaries
magnetic properties
Atoms

ASJC Scopus subject areas

  • Structural Biology
  • Instrumentation
  • Radiology Nuclear Medicine and imaging

これを引用

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title = "Atomic resolved phase map of monolayer MoS2 retrieved by spherical aberration-corrected transport of intensity equation",
abstract = "An atomic resolution phase map,which enables us to observe charge distribution or magnetic properties at an atomic scale,has been pointed out to be retrieved by transport of intensity equation (TIE) when taking two atomic-resolved transmission electron microscope (TEM) images of small defocus difference. In this work,we firstly obtained the atomic-resolved phase maps of an exfoliated molybdenum disulfide sheet using spherical aberration-corrected transmission electron microscope. We successfully observed 60° grain boundary of mechanically exfoliated monolayer molybdenum disulfide sheet. The relative phase shift of a single molybdenum atomic column to the column consisting of two sulfur atoms was obtained to be about 0.01 rad on average,which was about half lower than the simulated TIE phase map,indicating that the individual atomic sites can be distinguished qualitatively. The appropriate condition for retrieving atomic-resolved TIE phase maps was briefly discussed.",
keywords = "60° grain boundary, Atomic resolution, Monolayer molybdenum disulfide (MoS), Phase retrieval, Transport of intensity equation (TIE)",
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T1 - Atomic resolved phase map of monolayer MoS2 retrieved by spherical aberration-corrected transport of intensity equation

AU - Zhang, Xiaobin

AU - Oshima, Yoshifumi

PY - 2016/10/1

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N2 - An atomic resolution phase map,which enables us to observe charge distribution or magnetic properties at an atomic scale,has been pointed out to be retrieved by transport of intensity equation (TIE) when taking two atomic-resolved transmission electron microscope (TEM) images of small defocus difference. In this work,we firstly obtained the atomic-resolved phase maps of an exfoliated molybdenum disulfide sheet using spherical aberration-corrected transmission electron microscope. We successfully observed 60° grain boundary of mechanically exfoliated monolayer molybdenum disulfide sheet. The relative phase shift of a single molybdenum atomic column to the column consisting of two sulfur atoms was obtained to be about 0.01 rad on average,which was about half lower than the simulated TIE phase map,indicating that the individual atomic sites can be distinguished qualitatively. The appropriate condition for retrieving atomic-resolved TIE phase maps was briefly discussed.

AB - An atomic resolution phase map,which enables us to observe charge distribution or magnetic properties at an atomic scale,has been pointed out to be retrieved by transport of intensity equation (TIE) when taking two atomic-resolved transmission electron microscope (TEM) images of small defocus difference. In this work,we firstly obtained the atomic-resolved phase maps of an exfoliated molybdenum disulfide sheet using spherical aberration-corrected transmission electron microscope. We successfully observed 60° grain boundary of mechanically exfoliated monolayer molybdenum disulfide sheet. The relative phase shift of a single molybdenum atomic column to the column consisting of two sulfur atoms was obtained to be about 0.01 rad on average,which was about half lower than the simulated TIE phase map,indicating that the individual atomic sites can be distinguished qualitatively. The appropriate condition for retrieving atomic-resolved TIE phase maps was briefly discussed.

KW - 60° grain boundary

KW - Atomic resolution

KW - Monolayer molybdenum disulfide (MoS)

KW - Phase retrieval

KW - Transport of intensity equation (TIE)

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