Abstract
Strain can tune desirable electronic behavior in graphene, but there has been limited progress in controlling strain in graphene devices. In this paper, we study the mechanical response of graphene on substrates patterned with arrays of mesoscale pyramids. Using atomic force microscopy, we demonstrate that the morphology of graphene can be controlled from conformal to suspended depending on the arrangement of pyramids and the aspect ratio of the array. Nonuniform strains in graphene suspended across pyramids are revealed by Raman spectroscopy and supported by atomistic modeling, which also indicates strong pseudomagnetic fields in the graphene. Our results suggest that incorporating mesoscale pyramids in graphene devices is a viable route to achieving strain-engineering of graphene.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 5799-5806 |
| Number of pages | 8 |
| Journal | ACS Nano |
| Volume | 9 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 23 2015 |
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Keywords
- Raman spectroscopy
- graphene
- pseudomagnetic fields
- strain
- strain-engineering
ASJC Scopus subject areas
- Materials Science(all)
- Engineering(all)
- Physics and Astronomy(all)
Cite this
Mechanical Control of Graphene on Engineered Pyramidal Strain Arrays. / Gill, Stephen T.; Hinnefeld, John H.; Zhu, Shuze; Swanson, William J.; Li, Teng; Mason, Nadya.
In: ACS Nano, Vol. 9, No. 6, 23.06.2015, p. 5799-5806.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Mechanical Control of Graphene on Engineered Pyramidal Strain Arrays
AU - Gill, Stephen T.
AU - Hinnefeld, John H.
AU - Zhu, Shuze
AU - Swanson, William J.
AU - Li, Teng
AU - Mason, Nadya
PY - 2015/6/23
Y1 - 2015/6/23
N2 - Strain can tune desirable electronic behavior in graphene, but there has been limited progress in controlling strain in graphene devices. In this paper, we study the mechanical response of graphene on substrates patterned with arrays of mesoscale pyramids. Using atomic force microscopy, we demonstrate that the morphology of graphene can be controlled from conformal to suspended depending on the arrangement of pyramids and the aspect ratio of the array. Nonuniform strains in graphene suspended across pyramids are revealed by Raman spectroscopy and supported by atomistic modeling, which also indicates strong pseudomagnetic fields in the graphene. Our results suggest that incorporating mesoscale pyramids in graphene devices is a viable route to achieving strain-engineering of graphene.
AB - Strain can tune desirable electronic behavior in graphene, but there has been limited progress in controlling strain in graphene devices. In this paper, we study the mechanical response of graphene on substrates patterned with arrays of mesoscale pyramids. Using atomic force microscopy, we demonstrate that the morphology of graphene can be controlled from conformal to suspended depending on the arrangement of pyramids and the aspect ratio of the array. Nonuniform strains in graphene suspended across pyramids are revealed by Raman spectroscopy and supported by atomistic modeling, which also indicates strong pseudomagnetic fields in the graphene. Our results suggest that incorporating mesoscale pyramids in graphene devices is a viable route to achieving strain-engineering of graphene.
KW - Raman spectroscopy
KW - graphene
KW - pseudomagnetic fields
KW - strain
KW - strain-engineering
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UR - http://www.scopus.com/inward/citedby.url?scp=84934961407&partnerID=8YFLogxK
U2 - 10.1021/acsnano.5b00335
DO - 10.1021/acsnano.5b00335
M3 - Article
AN - SCOPUS:84934961407
VL - 9
SP - 5799
EP - 5806
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
IS - 6
ER -