IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    Nanotubes: Science and Applications Topical Conference Tuesday Sessions
       Session NT+EL+NS-TuM

Paper NT+EL+NS-TuM5
Tailoring Growth and Properties of Nanotube Networks for Applications

Tuesday, October 30, 2001, 9:40 am, Room 133

Session: Nanotubes: Growth and Characterization
Presenter: B.-Q. Wei, Rensselaer Polytechnic Institute
Authors: B.-Q. Wei, Rensselaer Polytechnic Institute
Y.-P. Zhao, Rensselaer Polytechnic Institute
P.M. Ajayan, Rensselaer Polytechnic Institute
G. Ramanath, Rensselaer Polytechnic Institute
Correspondent: Click to Email
We present strategies for obtaining aligned nanotube architectures, and locally modifying their nanotube properties, to enable their use for applications such as interconnects in future devices. We demonstrate various methodologies such as substrate templating, using gas-phase catalysts delivery, and interfacial reactions, to obtain substrate-selective growth, vertical as well as horizontal alignment, and metal-nanotube-substrate connection formation by chemical vapor deposition (CVD). We describe the use of focused ion beam (FIB) to modify the nanotube structure after deposition. We show that by controlling ion energy and dose, one can either tailor the electrical properties of nanotubes and/or micromachine them. We also report, for the first time, a nanotube-length-independent piezoelectric-like resonance in the impedance spectrum at ~ 37.6 kHz during AC probing of single-walled nanotubes. These will be relevant from the viewpoint of building devices such as ultrasonic nanotransducers, quantum well devices and nano-electromechanical actuators.