In situ raman measurements of suspended individual single-walled carbon nanotubes under strain.
We present a technique for in situ Raman measurements of suspended individual single-walled carbon nanotubes (SWNTs) under strain. We observe a strong change in the radial breathing mode intensity with increasing strain as the nanotube moves out of (or into) resonance, and for strain greater than approximately 2%, there is a clear irreversible upshift in the G-mode frequencies accompanied by an increase in intensity of a broad peak at a position associated with the D mode. For lower strain, the G-mode peaks (A1, E1, and E2) do not change significantly in position but change in relative intensity.
Lee
Sang Wook
SW
Department of Physics, Göteborg University, Göteborg, SE-412 96, Sweden.
Jeong
Goo-Hwan
GH
Campbell
Eleanor E B
EE
D004548:Elasticity; D008422:Materials Testing / Q000379:methods*; D008846:Micromanipulation / Q000379:methods*; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013314:Stress, Mechanical
D037742:Nanotubes, Carbon