skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Electron-Beam-Induced Synthesis of Hexagonal 1 H -MoSe 2 from Square β-FeSe Decorated with Mo Adatoms

Abstract

Two-dimensional (2D) materials have generated interest in the scientific community because of the advanced electronic applications they might offer. Powerful electron beam microscopes have been used not only to evaluate the structures of these materials but also to manipulate them by forming vacancies, nanofragments, and nanowires or joining nanoislands together. In this work, we show that the electron beam in a scanning transmission electron microscope (STEM) can be used in yet another way: to mediate the synthesis of 2D 1H-MoSe2 from Mo-decorated 2D β-FeSe and simultaneously image the process on the atomic scale. This is quite remarkable given the different crystal structures of the reactant (square lattice β-FeSe) and the product (hexagonal lattice 1H-MoSe2). The feasibility of the transformation was first explored by theoretical calculations that predicted that the reaction is exothermic. Furthermore, a theoretical reaction path to forming a stable 1H-MoSe2 nucleation kernel within pure β-FeSe was found, demonstrating that the pertinent energy barriers are smaller than the energy supplied by the STEM electron beam.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [1]; ORCiD logo [4];  [5];  [6]
  1. Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, United States; Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
  2. National Institute of Advanced Industrial Science and Technology (AIST), AIST Central 5, Tsukuba 305-8565, Japan
  3. Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore
  4. Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore; Centre for Micro-/Nano-electronics (NOVITAS), School of Electrical &, Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore; CINTRA CNRS/NTU/THALES, UMI 3288, Research Techno Plaza, 50 Nanyang Drive, Border X Block, Level 6, 637553 Singapore
  5. Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, United States; Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States; Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, Tennessee 37235, United States
  6. National Institute of Advanced Industrial Science and Technology (AIST), AIST Central 5, Tsukuba 305-8565, Japan; Department of Mechanical Engineering, The University of Tokyo, Tokyo 113-8656, Japan
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory-National Energy Research Scientific Computing Center
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1484761
Grant/Contract Number:  
FG02-09ER46554; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 18; Journal Issue: 3; Journal ID: ISSN 1530-6984
Country of Publication:
United States
Language:
English

Citation Formats

Brehm, John A., Lin, Junhao, Zhou, Jiadong, Sims, Hunter, Liu, Zheng, Pantelides, Sokrates T., and Suenaga, Kazu. Electron-Beam-Induced Synthesis of Hexagonal 1 H -MoSe 2 from Square β-FeSe Decorated with Mo Adatoms. United States: N. p., 2018. Web. doi:10.1021/acs.nanolett.7b05457.
Brehm, John A., Lin, Junhao, Zhou, Jiadong, Sims, Hunter, Liu, Zheng, Pantelides, Sokrates T., & Suenaga, Kazu. Electron-Beam-Induced Synthesis of Hexagonal 1 H -MoSe 2 from Square β-FeSe Decorated with Mo Adatoms. United States. doi:10.1021/acs.nanolett.7b05457.
Brehm, John A., Lin, Junhao, Zhou, Jiadong, Sims, Hunter, Liu, Zheng, Pantelides, Sokrates T., and Suenaga, Kazu. Thu . "Electron-Beam-Induced Synthesis of Hexagonal 1 H -MoSe 2 from Square β-FeSe Decorated with Mo Adatoms". United States. doi:10.1021/acs.nanolett.7b05457. https://www.osti.gov/servlets/purl/1484761.
@article{osti_1484761,
title = {Electron-Beam-Induced Synthesis of Hexagonal 1 H -MoSe 2 from Square β-FeSe Decorated with Mo Adatoms},
author = {Brehm, John A. and Lin, Junhao and Zhou, Jiadong and Sims, Hunter and Liu, Zheng and Pantelides, Sokrates T. and Suenaga, Kazu},
abstractNote = {Two-dimensional (2D) materials have generated interest in the scientific community because of the advanced electronic applications they might offer. Powerful electron beam microscopes have been used not only to evaluate the structures of these materials but also to manipulate them by forming vacancies, nanofragments, and nanowires or joining nanoislands together. In this work, we show that the electron beam in a scanning transmission electron microscope (STEM) can be used in yet another way: to mediate the synthesis of 2D 1H-MoSe2 from Mo-decorated 2D β-FeSe and simultaneously image the process on the atomic scale. This is quite remarkable given the different crystal structures of the reactant (square lattice β-FeSe) and the product (hexagonal lattice 1H-MoSe2). The feasibility of the transformation was first explored by theoretical calculations that predicted that the reaction is exothermic. Furthermore, a theoretical reaction path to forming a stable 1H-MoSe2 nucleation kernel within pure β-FeSe was found, demonstrating that the pertinent energy barriers are smaller than the energy supplied by the STEM electron beam.},
doi = {10.1021/acs.nanolett.7b05457},
journal = {Nano Letters},
number = 3,
volume = 18,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share: