Nanomechanics of individual carbon nanotubes from pyrolytically grown arrays.

The bending modulus of individual carbon nanotubes from aligned arrays grown by pyrolysis was measured by in situ electromechanical resonance in transmission electron microscopy (TEM). The bending modulus of nanotubes with point defects was approximately 30 GPa and that of nanotubes with volume defect was 2-3 GPa. The time-decay constant of nanotube resonance in a vacuum of 10(-4) Torr was approximately 85 micros. A femtogram nanobalance was demonstrated based on nanotube resonance; it has the potential for measuring the mass of chain-structured large molecules. The in situ TEM provides a powerful approach towards nanomechanics of fiberlike nanomaterials with well-characterized defect structures.

[1]  Liming Dai,et al.  Patterned Growth and Contact Transfer of Well-Aligned Carbon Nanotube Films , 1999 .

[2]  Zhengwei Pan,et al.  Tensile tests of ropes of very long aligned multiwall carbon nanotubes , 1999 .

[3]  Andrew G. Glen,et al.  APPL , 2001 .

[4]  M. Lutwyche,et al.  Time-resolved observation of thermal oscillations by transmission electron microscopy , 1997 .

[5]  W. D. Heer,et al.  Electrostatic deflections and electromechanical resonances of carbon nanotubes , 1999, Science.

[6]  T. Ebbesen.  Physical Properties of Carbon Nanotubes , 1997 .

[7]  G. A. D. Briggs,et al.  Elastic and shear moduli of single-walled carbon nanotube ropes , 1999 .

[8]  de Heer WA,et al.  Nanomeasurements in Transmission Electron Microscopy. , 2000, Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada.

[9]  Charles M. Lieber,et al.  Nanobeam Mechanics: Elasticity, Strength, and Toughness of Nanorods and Nanotubes , 1997 .

[10]  W. D. de Heer,et al.  Nanomeasurements of individual carbon nanotubes by in situ TEM , 2000 .

[11]  H. Dai,et al.  Self-oriented regular arrays of carbon nanotubes and their field emission properties , 1999, Science.

[12]  S. Xie,et al.  Large-Scale Synthesis of Aligned Carbon Nanotubes , 1996, Science.

[13]  T. Ebbesen,et al.  Exceptionally high Young's modulus observed for individual carbon nanotubes , 1996, Nature.

[14]  M. Dresselhaus,et al.  Physical properties of carbon nanotubes , 1998 .

[15]  M. Siegal,et al.  Synthesis of large arrays of well-aligned carbon nanotubes on glass , 1998, Science.