Temperature dependence of Raman spectra in single-walled carbon nanotube rings

2008 ◽  
Vol 92 (12) ◽  
pp. 121905 ◽  
Author(s):  
Li Song ◽  
Wenjun Ma ◽  
Yan Ren ◽  
Weiya Zhou ◽  
Sishen Xie ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Temperature Dependence ◽  
Raman Spectra ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon

Single-walled carbon nanotube structure and radiation defects under the high energy electron beam

2021 ◽  
Vol 23 (2) ◽  
pp. 33-39
Author(s):  
I.I. Yuldashova ◽  
M.Yu. Tashmetov
Keyword(s):  
Carbon Nanotube ◽  
Raman Spectra ◽  
Electron Irradiation ◽  
Structural Parameters ◽  
High Energy ◽  
Radiation Defects ◽  
High Energy Electron ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Nanocrystallite Size

The effect of electron irradiation up to fluence of 1.54×1017 electron/cm2 on the structural parameters, sizes of nanocrystallites, microstrains, and Raman spectra of a single-walled carbon nanotube (SWCNT) was studied. Electron irradiation leads to an increase in the lattice parameters in the a and b directions from 4.7623 Å to 4.9378 Å and a decrease along the c axis from 3.9491 Å to 3.9469 Å. Electron irradiation stimulates the growth of the nanocrystallite size from 4.06 nm to 5.03 nm, leads to a shift of the Raman spectra towards higher frequencies, and indicates the appearance of a spectrum at 805 cm–1, which is caused by the formation of defects in a SWCNT.

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