Title :
Mechanical Properties of Double Coiled Carbon Nanotubes
Author :
Chang, Neng-Kai ; Chang, Shuo-Hung
Author_Institution :
Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan
Abstract :
The mechanical response of double coiled carbon nanotubes (CNTs) was examined with an atomic force microscopy (AFM) based technique. The compression and tension measurements were carried out in the lateral force image mode. The spring constant of the coiled CNTs and the shear modulus of CNTs have been derived, respectively. We found that the spring constant of the coiled CNT suddenly decreased while the coiled CNT buckled. The shear modulus of CNTs, 3 ± 0.2 GPa, calculated from the spring constant of coiled CNTs is extremely low, compared with well-known high tensile strength of CNTs, ∼1 TPa. The results suggest that the motion of coiled CNTs is mainly relative to the behavior of the slide between the inner tubes of multi-walled CNTs (MWNTs).
Keywords :
AFM; Coiled CNTs; Compression Test; Tension Test; Atomic force microscopy; Calibration; Carbon nanotubes; Force measurement; Frequency estimation; Mechanical factors; Scanning electron microscopy; Springs; Structural beams; Testing; AFM; Coiled CNTs; Compression Test; Tension Test;
Conference_Titel :
Nanotechnology, 2006. IEEE-NANO 2006. Sixth IEEE Conference on
Print_ISBN :
1-4244-0077-5
DOI :
10.1109/NANO.2006.247626
