Height independent compressive modulus of vertically aligned carbon nanotube arrays.
The compressive modulus of dense vertically aligned multiwalled carbon nanotube (CNT) arrays synthesized by chemical vapor deposition was investigated using an optically probed precision-loading platform. For CNT arrays with heights ranging from 15 to 500 microm, the moduli were measured to be about 0.25 MPa and were found to be independent of array height. A continuum mechanics model based on multimode buckling guided by the wavy features of CNT arrays is derived and explains well the measured compressive properties. The measured compressive modulus of the CNT arrays also satisfies the "Dahlquist tack criterion" for pressure sensitive adhesives, which was previously observed for these vertically aligned CNT arrays (Zhao, Y., et al. J. Vac. Sci. Technol., B 2006, 24, 331-335).
Tong
Tao
T
Department of Mechanical Engineering, University of California, Berkeley, California 94720, USA.
Zhao
Yang
Y
Delzeit
Lance
L
Kashani
Ali
A
Meyyappan
M
M
Majumdar
Arun
A
D019245:Compressive Strength; D003198:Computer Simulation; D003460:Crystallization / Q000379:methods*; D004548:Elasticity; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008956:Models, Chemical; D008958:Models, Molecular; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013314:Stress, Mechanical; D013499:Surface Properties
D046911:Macromolecular Substances; D037742:Nanotubes, Carbon