Magnetic and Raman Based Method for Process Control During Fabrication of Carbon Nanotube Based Structures

摘要

A method of fabricating composite structures comprising carbon nanotubes. The method including providing a nanotube starting material, forming the composite structure with the nanotube starting material and monitoring at least a magnetic or Raman property of the composite structure while forming the composite structure.

主权项

1. A method for process control during fabrication of carbon nanotube structures, the method comprising:
providing a carbon nanotube starting material; forming a composite structure with the carbon nanotube starting material under one or more fabrication process parameters to achieve a desired alignment of individual carbon nanotubes, wherein forming the composite structure comprises:
monitoring a first property of the composite structure with polarized Raman spectroscopy to characterize the alignment of individual carbon nanotubes, S, as described by the formula,
S=½(3 cos2 β−1), wherein, β is the angle between the nanotubes and a plurality of measurement axes,
adjusting the one or more fabrication process parameters if the desired alignment of individual carbon nanotubes is not obtained.