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    Micro-pillar fabricated from a dense CNT brush  


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Siddhartha Pathak
Postdoctoral Scholar

Highly dense carbon nanotube (CNT) brushes, produced by high temperature vacuum decomposition of SiC single crystals, were fabricated to a 500nm diameter pillar using focused ion beam (FIB) micromachining with a Ga ion source, and imaged using a scanning electron microscope (SEM). Under in-situ micro-compression experiments, these dense CNT pillars exhibit significantly higher modulus (~150 GPa) and orders of magnitude higher resistance to buckling (~6 GPa) than vapor phase deposited CNT brushes or carbon walls. The ability of these dense CNTs to dissipate energy, while withstanding such elevated loads, is highly promising for energy-absorbing applications, especially in MEMS devices.


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