Abstract
Various characteristics of the growth of carbon nanotubes (CNTs) were examinedby in situ optical interference patterns. A dc plasma chemical vapour depositiontechnique was used to grow the CNTs. The optical interference curves providedconsiderable in situ information such as the length, the alignment and relatedgrowth properties of CNTs. Curled CNTs have relatively small numbers ofoscillations compared to well-aligned nanotubes during the same growth time.Sparse and short CNTs have shown a high reflectance with no interferenceoscillations. The alignment of the CNTs was strongly dependent on variations inthe NH3 pre-treatment current. The electric field has a large effect onthe direction of growth of well-aligned CNTs with high packing density.However, curled CNTs do not appear to be affected by the presence ofthe electric field. This optical interference method provides an in situand effective method for monitoring the growth characteristics of CNTs.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
