6533b86ffe1ef96bd12cdd1b

RESEARCH PRODUCT

Electromechanical Behavior of Single and Multiwall Carbon Nanotubes

Antonio Pantano

subject

Materials sciencebusiness.industryCarbon nanotube actuatorsMechanical properties of carbon nanotubesCarbon nanotubeSymmetry (physics)Finite element methodlaw.inventionOptical properties of carbon nanotubesCondensed Matter::Materials ScienceSemiconductorlawComposite materialDeformation (engineering)business

description

Carbon nanotubes (CNTs) can be metallic or semiconductors depending simply on geometric characteristics. This peculiar electronic behavior, combined with high mechanical strength, make them potential building blocks of a new nano-electronic technology. High resolution images of CNTs often disclose structural deformations such as bent, twisted, or collapsed tubes. These deformations break the tube symmetry, and a change in their electronic properties should result. A computationally effective mixed finite element-tight-binding approach able to simulate the electromechanical behavior of single and multiwall nanotubes used in nano-electronic devices is presented. The finite element (FE) computes the evolution of atomic coordinates with deformation and provides these coordinates to a tight-binding (TB) code, enabling computation and updating of the electrical conductivity. The TB code is engineered to realize dramatic computational savings in calculating deformation-induced changes in electrical transport properties of the nanotubes.

yearjournalcountryeditionlanguage
2008-09-02
http://hdl.handle.net/10447/34631