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Interplay between intercalated oxygen superstructures and monolayer h -BN on Cu(100)

Journal Article · · Physical Review B
 [1];  [1];  [2];  [3];  [4];  [1];  [2];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences; Univ. of Tennessee, Knoxville, TN (United States); Korea Research Inst. of Standards and Science, Daejeon (Korea, Republic of); Korea Univ. of Science and Technology, Daejeon (Korea, Republic of). Dept. of Nano Science
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences; Univ. of Tennessee, Knoxville, TN (United States)
The confinement effect of intercalated atoms in van der Waals heterostructures can lead to interesting interactions between the confined atoms or molecules and the overlaying two-dimensional (2D) materials. In this paper, we report the formation of ordered Cu(100) p(2×2) oxygen superstructures by oxygen intercalation under the monolayer hexagonal boron nitride (h-BN) on Cu after annealing. By using scanning tunneling microscopy and x-ray photoelectron spectroscopy, we identify the superstructure and reveal its roles in passivating the exposed Cu surfaces, decoupling h-BN and Cu, and disintegrating h-BN monolayers. The oxygen superstructure appears as a 2D pattern on the exposed Cu surface or quasi-1D stripes of paired oxygen intercalated in the interface of h-BN and Cu predominantly oriented along the moiré modulations. The oxygen superstructure is shown to etch the overlaying h-BN monolayer in a thermal annealing process. After extended annealing, the h-BN monolayer disintegrates into nanoislands with zigzag edges. Finally, we discuss the implications of these findings on the stability and oxidation resistance of h-BN and relate them to challenges in process integration and 2D heterostructures.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231; AC05-00OR22725
OSTI ID:
1302884
Alternate ID(s):
OSTI ID: 1298339
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 6 Vol. 94; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Surface chemistry and catalysis confined under two-dimensional materials journal January 2017
Interfacial water intercalation-induced metal-insulator transition in NbS 2 /BN heterostructure journal March 2019
Oxidation of h-BN on strongly and weakly interacting metal surfaces journal March 2019
Oxidization stability of atomically precise graphene nanoribbons journal January 2018
Ångstrom-Scale, Atomically Thin 2D Materials for Corrosion Mitigation and Passivation journal February 2019

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