AVS 51st International Symposium
    Nanometer-scale Science and Technology Tuesday Sessions
       Session NS-TuM

Paper NS-TuM1
Controlled Fabrication and Modification of Organized Carbon Nanotube Architectures

Tuesday, November 16, 2004, 8:20 am, Room 213D

Session: Nanotube Processing and Composite Materials
Presenter: Y.J. Jung, Rensselaer Polytechnic Institute
Authors: Y.J. Jung, Rensselaer Polytechnic Institute
R. Vajtai, Rensselaer Polytechnic Institute
N. Chakrapani, Rensselaer Polytechnic Institute
G. Meng, Rensselaer Polytechnic Institute
P.M. Ajayan, Rensselaer Polytechnic Institute
Y. Homma, NTT Basic Research Laboratories
Y. Kobayashi, NTT Basic Research Laboratories
T. Ogino, Yokohama National University, Japan
Correspondent: Click to Email
An overview of our results on the controlled fabrication and modification of organized carbon nanotube architectures will be presented. The talk includes strategies for building suspended single-walled carbon nanotubes (SWNTs) forming self-directed networks on nano-scale patterned substrate using chemical vapor deposition (CVD). We elaborate the straightening process of nanotubes in the networks suspended on Si pillars by Ga ion irradiation in a Focused Ion Beam (FIB). Beyond the morphological changes of the nanotubes and nanotube bundles we will present our conclusions for carbon atom ejection and compare with previous electron beam and ion beam irradiation experiments. Although ion irradiation induces defective structures into the nanotube lattice, as micro-Raman mapping shows, the form and dimensions of the nanotubes remain close to that of the original grown morphology. To demonstrate another nanostructure modification we will discuss the formation of intriguing two-dimensional cellular foams from capillarity-induced perturbations during the drying of vertically aligned multi-walled carbon nanotubes (MWNT) architectures with the mechanisms giving rise to pattern formation and methods of controlling the structure and orientation. Similarly, we will briefly present our latest results for organized assembly of multiwalled nanotubes into various 2-D and 3-D structures on planar substrates as well as within anodic porous aluminum oxide templates.