BROWSE

Related Researcher

Author's Photo

Ruoff, Rodney S.
Center for Multidimensional Carbon Materials (CMCM)
Research Interests
  • Next generation carbons, ultrathin sp3-bonded carbon sheets, negative curvature (‘Schwartzites’) carbons, sp3/sp2 hybrid carbon materials, model compounds for novel carbon materials, reaction mechanisms

ITEM VIEW & DOWNLOAD

Impact of Grain Boundaries on the Elastic Behavior of Transferred Polycrystalline Graphene

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Impact of Grain Boundaries on the Elastic Behavior of Transferred Polycrystalline Graphene
Author
Suk, Ji WonHao, YufengLiechti, Kenneth M.Ruoff, Rodney S.
Issue Date
2020-07
Publisher
American Chemical Society
Citation
Chemistry of Materials, v.32, no.14, pp.6078 - 6084
Abstract
The mechanical properties of nanomaterials can be strongly affected by their crystal structures and defect configurations. Here, the in-plane stiffness of polycrystalline graphene obtained by chemical vapor deposition (CVD) has been investigated by using bulge tests on suspended graphene membranes. In particular, the influence of grain boundaries (GBs) on the in-plane stiffness of graphene membranes was studied by controlling the density of GBs within graphene membranes. The GBs were visualized by sequential growth of 13C- and 12C-graphene along with detection of Raman peak shifts for 13C and 12C in graphene, which enabled the nondestructive evaluation of the GB density (defined as the ratio of the total GB length within a graphene membrane to the diameter of the membrane). Single-crystal graphene membranes without any GBs had an average Young’s modulus of 0.95 ± 0.12 TPa (corresponding to an average in-plane stiffness of 318 ± 40 N/m), comparable to that obtained from mechanically exfoliated graphene. An increased GB density within the membranes softened the graphene membranes, resulting in a lower in-plane stiffness. This phenomenon was most clearly observed when the lateral sizes of grains (<∼2 μm) were much smaller than the membrane diameter (8–9 μm).
URI
https://scholarworks.unist.ac.kr/handle/201301/49519
URL
https://pubs.acs.org/doi/10.1021/acs.chemmater.0c01660
DOI
10.1021/acs.chemmater.0c01660
ISSN
0897-4756
Appears in Collections:
CHM_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU