
Ngamta Thamwattana
Nanomechanics Group, School of Mathematics and Applied Statistics, University of Wollongong
Continuum modelling for carbon nanostructures
Wednesday 6th August 14:0514:55pm,
Eastern Avenue Lecture Theatre.
The nonbonded interactions between carbon nanostructures are studied. In particular, we focus on various interactions which involve a fullerene molecule. Using the LennardJones potential and the continuum approach, we provide the potential energy for fullereneatom interactions and by assuming that this atom is a typical atom on the surface of other carbon nanostructures, we derive the total potential energy for two nonconcentric fullerenes, nested fullerenes, or carbon onions, a fullerene inside a carbon nanotube and nanopeapods. A simple mathematical model is also presented for the oscillation of a fullerene inside a carbon nanotube. This oscillation produces a frequency in the gigahertz range, providing the potential for devices such as ultrafast optical filters and ultrasensitive nanoantennae. Further, issues involved selfassembled hybrid carbon nanostructures known as nanopeapods are studied. We consider three encapsulation mechanisms for a C60 fullerene entering a tube: (i) through the tube open end (headon), (ii) around the edge of the tube open end and (iii) through a defect opening on the tube wall. Once C60 fullerenes are encapsulated inside a nanotube, the arrangement of C60 fullerene chains is investigated. In particular, we consider both zigzag and spiral patterns for the fullerene chains.







