期刊
NANOTECHNOLOGY
卷 26, 期 17, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/26/17/175702
关键词
Raman scattering; strain; graphene
资金
- CNPq
- FAPEMIG
- US Department of Energy [DE-FG02-05ER46207]
- Swiss National Science Foundation [200021_149433]
- CAPES
- U.S. Department of Energy (DOE) [DE-FG02-05ER46207] Funding Source: U.S. Department of Energy (DOE)
- Swiss National Science Foundation (SNF) [200021_149433] Funding Source: Swiss National Science Foundation (SNF)
We demonstrate local strain measurements in graphene by using tip-enhanced Raman spectroscopy (TERS). We find that a single 5 nm particle can induce a radial strain over a lateral distance of similar to 170 nm. By treating the particle as a point force on a circular membrane, we find that the strain in the radial direction (r) is proportional to r(-2/3), in agreement with force-displacement measurements conducted on suspended graphene flakes. Our results demonstrate that TERS can be used to map out static strain fields at the nanoscale, which are inaccessible using force-displacement techniques.
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