Surface structure of bulk 2H-MoS 2 (0001) and exfoliated suspended monolayer MoS 2 : A selected area low energy electron diffraction study

Dai, Zhongwei; Jin, Wencan; Grady, Maxwell; Sadowski, Jerzy T.; Dadap, Jerry I.; Osgood, Richard M.; Pohl, Karsten

doi:10.1016/j.susc.2017.02.005

Title: Surface structure of bulk 2H-MoS ₂ (0001) and exfoliated suspended monolayer MoS ₂ : A selected area low energy electron diffraction study

Abstract

Here, we used selected area low energy electron diffraction intensity-voltage (μLEED-IV) analysis to investigate the surface structure of crystalline 2H molybdenum disulfide (MoS₂) and mechanically exfoliated and suspended monolayer MoS₂. Our results show that the surface structure of bulk 2H-MoS₂ is distinct from its bulk and that it has a slightly smaller surface relaxation at 320 K than previously reported at 95 K. We concluded that suspended monolayer MoS₂ shows a large interlayer relaxation compared to the MoS₂ sandwich layer terminating the bulk surface. The Debye temperature of MoS₂ was concluded to be about 600 K, which agrees with a previous theoretical study. Our work has shown that the dynamical μLEED-IV analysis performed with a low energy electron microscope (LEEM) is a powerful technique for determination of the local atomic structures of currently extensively studied two-dimensional (2-D) materials.

Authors:

Dai, Zhongwei ^[1]; Jin, Wencan ^[2]; Grady, Maxwell ^[1]; Sadowski, Jerzy T. ^[3]; Dadap, Jerry I. ^[2]; Osgood, Richard M. ^[2]; Pohl, Karsten ^[1]

Univ. of New Hampshire, Durham, NH (United States). Dept. of Physics and Materials Science Program
Columbia Univ., New York, NY (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials

Publication Date:: Fri Feb 10 00:00:00 EST 2017

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1345750

Alternate Identifier(s):: OSTI ID: 1397406

Report Number(s):: BNL-113594-2017-JA
Journal ID: ISSN 0039-6028; R&D Project: 16083; KC0403020

Grant/Contract Number:: SC00112704; SC0012704; FG 02-04-ER-46157

Resource Type:: Accepted Manuscript

Journal Name:: Surface Science

Additional Journal Information:: Journal Volume: 660; Journal Issue: C; Journal ID: ISSN 0039-6028

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; MoS2; μLEED-IV; 2-D material; Surface structure; LEEM

Citation Formats


                    Dai, Zhongwei, Jin, Wencan, Grady, Maxwell, Sadowski, Jerzy T., Dadap, Jerry I., Osgood, Richard M., and Pohl, Karsten. Surface structure of bulk 2H-MoS 2 (0001) and exfoliated suspended monolayer MoS 2 : A selected area low energy electron diffraction study.  United States: N. p., 2017. 
Web.  doi:10.1016/j.susc.2017.02.005.

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                    Dai, Zhongwei, Jin, Wencan, Grady, Maxwell, Sadowski, Jerzy T., Dadap, Jerry I., Osgood, Richard M., & Pohl, Karsten. Surface structure of bulk 2H-MoS 2 (0001) and exfoliated suspended monolayer MoS 2 : A selected area low energy electron diffraction study.  United States.  https://doi.org/10.1016/j.susc.2017.02.005

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                    Dai, Zhongwei, Jin, Wencan, Grady, Maxwell, Sadowski, Jerzy T., Dadap, Jerry I., Osgood, Richard M., and Pohl, Karsten. Fri .  
"Surface structure of bulk 2H-MoS 2 (0001) and exfoliated suspended monolayer MoS 2 : A selected area low energy electron diffraction study".  United States.  https://doi.org/10.1016/j.susc.2017.02.005.  https://www.osti.gov/servlets/purl/1345750.

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@article{osti_1345750,

  title        = {Surface structure of bulk 2H-MoS 2 (0001) and exfoliated suspended monolayer MoS 2 : A selected area low energy electron diffraction study},

  author       = {Dai, Zhongwei and Jin, Wencan and Grady, Maxwell and Sadowski, Jerzy T. and Dadap, Jerry I. and Osgood, Richard M. and Pohl, Karsten},

  abstractNote = {Here, we used selected area low energy electron diffraction intensity-voltage (μLEED-IV) analysis to investigate the surface structure of crystalline 2H molybdenum disulfide (MoS2) and mechanically exfoliated and suspended monolayer MoS2. Our results show that the surface structure of bulk 2H-MoS2 is distinct from its bulk and that it has a slightly smaller surface relaxation at 320 K than previously reported at 95 K. We concluded that suspended monolayer MoS2 shows a large interlayer relaxation compared to the MoS2 sandwich layer terminating the bulk surface. The Debye temperature of MoS2 was concluded to be about 600 K, which agrees with a previous theoretical study. Our work has shown that the dynamical μLEED-IV analysis performed with a low energy electron microscope (LEEM) is a powerful technique for determination of the local atomic structures of currently extensively studied two-dimensional (2-D) materials.},

  doi          = {10.1016/j.susc.2017.02.005},

  journal      = {Surface Science},

  number       = C,

  volume       = 660,

  place        = {United States},

  year         = {Fri Feb 10 00:00:00 EST 2017},

  month        = {Fri Feb 10 00:00:00 EST 2017}

}

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Works referencing / citing this record:

Experimental determination of thermal expansion of natural MoS ₂
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Anemone, Gloria; Al Taleb, Amjad; Castellanos-Gomez, Andres
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Jin, Wencan; Schiros, Theanne; Lin, Yi
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Title: Surface structure of bulk 2H-MoS 2 (0001) and exfoliated suspended monolayer MoS 2 : A selected area low energy electron diffraction study

Abstract

Citation Formats

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Title: Surface structure of bulk 2H-MoS ₂ (0001) and exfoliated suspended monolayer MoS ₂ : A selected area low energy electron diffraction study

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Electronic structure of ${MoSe}_{2}$ , ${MoS}_{2}$ , and ${WSe}_{2}$ . I. Band-structure calculations and photoelectron spectroscopy
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Substrate interactions with suspended and supported monolayer $Mo S_{2}$ : Angle-resolved photoemission spectroscopy
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Local structural and compositional determination via electron scattering: Heterogeneous Cu(001)-Pd surface alloy
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Determining the structure of Ru(0001) from low-energy electron diffraction of a single terrace
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The thermal expansion of 2 H -MoS ₂ , 2 H -MoSe ₂ and 2 H -WSe ₂ between 20 and 800°C
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