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Title: Nanoindentation on Monolayer MoS 2 Kirigami

Abstract

Mechanical properties of materials can be altered significantly by the ancient art of kirigami. We study the mechanical properties of atomically thin kirigami membranes of MoS2 using molecular dynamics simulations. Nanoindentation simulations are performed to study the mechanical response of rectangular and hexagonal kirigami structures. Dramatic changes are observed in the ductility of monolayer kirigami MoS2 compared with those of a pristine MoS2 monolayer. Load-displacement curves of kirigami structures exhibit negligible hysteresis, and kirigami structures display remarkable elastic recovery upon unloading. Defects formed at the edges and corners of kirigami structures play an important role in the mechanical response of the membranes.

Authors:
ORCiD logo; ORCiD logo; ORCiD logo;
Publication Date:
Research Org.:
Univ. of Southern California, Los Angeles, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1525331
Alternate Identifier(s):
OSTI ID: 1530178; OSTI ID: 1530187
Grant/Contract Number:  
SC0018195
Resource Type:
Published Article
Journal Name:
ACS Omega
Additional Journal Information:
Journal Name: ACS Omega Journal Volume: 4 Journal Issue: 6; Journal ID: ISSN 2470-1343
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 97 MATHEMATICS AND COMPUTING

Citation Formats

Wang, Beibei, Nakano, Aiichiro, Vashishta, Priya D., and Kalia, Rajiv K. Nanoindentation on Monolayer MoS 2 Kirigami. United States: N. p., 2019. Web. doi:10.1021/acsomega.9b00771.
Wang, Beibei, Nakano, Aiichiro, Vashishta, Priya D., & Kalia, Rajiv K. Nanoindentation on Monolayer MoS 2 Kirigami. United States. https://doi.org/10.1021/acsomega.9b00771
Wang, Beibei, Nakano, Aiichiro, Vashishta, Priya D., and Kalia, Rajiv K. Fri . "Nanoindentation on Monolayer MoS 2 Kirigami". United States. https://doi.org/10.1021/acsomega.9b00771.
@article{osti_1525331,
title = {Nanoindentation on Monolayer MoS 2 Kirigami},
author = {Wang, Beibei and Nakano, Aiichiro and Vashishta, Priya D. and Kalia, Rajiv K.},
abstractNote = {Mechanical properties of materials can be altered significantly by the ancient art of kirigami. We study the mechanical properties of atomically thin kirigami membranes of MoS2 using molecular dynamics simulations. Nanoindentation simulations are performed to study the mechanical response of rectangular and hexagonal kirigami structures. Dramatic changes are observed in the ductility of monolayer kirigami MoS2 compared with those of a pristine MoS2 monolayer. Load-displacement curves of kirigami structures exhibit negligible hysteresis, and kirigami structures display remarkable elastic recovery upon unloading. Defects formed at the edges and corners of kirigami structures play an important role in the mechanical response of the membranes.},
doi = {10.1021/acsomega.9b00771},
journal = {ACS Omega},
number = 6,
volume = 4,
place = {United States},
year = {Fri Jun 07 00:00:00 EDT 2019},
month = {Fri Jun 07 00:00:00 EDT 2019}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1021/acsomega.9b00771

Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

Figures / Tables:

Figure-1 Figure-1: (a) Load−displacement curves for nanoindentation on MoS2 with three kirigami structures of different area fractions. As a reference, the response of the MoS2 monolayer without the kirigami structure is shown in Figure S2 in the Supporting Information. The green curve is the indentation response curve of the kirigami patternmore » shown in (b). The blue and red curves correspond to patterns shown in (c) and (d). The arrows in (a) pointing upward and downward indicate loading and unloading processes, respectively. The hysteresis in the load−displacement curves indicates irreversible damage in MoS2 kirigami structures during nanoindentation. The MoS2 kirigami pattern in (d) can be indented much more with a smaller load than the pristine MoS2 monolayer.« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.