Temperature-induced evolution of strain and doping in an isotopically labeled two-dimensional graphene - C70 fullerene peapod
- Resource Type
- Authors
- Tim Verhagen; Jana Vejpravova; Václav Valeš; M. Kalbac
- Source
- Diamond and Related Materials. 75:140-145
- Subject
- Fullerene
Materials science
Nanotechnology
02 engineering and technology
010402 general chemistry
01 natural sciences
law.invention
symbols.namesake
law
Materials Chemistry
Electrical and Electronic Engineering
Double layer (biology)
Strain (chemistry)
Graphene
Mechanical Engineering
Doping
General Chemistry
Atmospheric temperature range
021001 nanoscience & nanotechnology
0104 chemical sciences
Electronic, Optical and Magnetic Materials
Chemical physics
symbols
0210 nano-technology
Raman spectroscopy
Layer (electronics)
- Language
- ISSN
- 0925-9635
A two-dimensional peapod (2D-peapod) was engineered by sandwiching C 70 fullerenes between two isotopically labeled graphene single-layers. Raman spectral mapping was used to investigate in - situ the evolution of strain and doping associated with topographic changes of the graphene layers in the temperature range 10–300 K. The isotope labeling of the top layer with 13 C allowed us following the strain and doping in the bottom and top layer independently. The global behavior of the temperature dependence of the 12 C (bottom) and 13 C (top) graphene layer does not significantly deviates from that of an isotopically labeled graphene double layer. However, the presence of the C 70 fullerenes give rise to the creation of specific networks of wrinkles in the top graphene layer, which significantly evolve with decreasing temperature. We propose that the C 70 fullerenes adhered to the graphene layers act locally as a mutual mechanical coupler, and govern the local reconstruction of the topography of the 2D-peapod.