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Theses

Conception et Modélisation des Dispositifs de Biocaptage à Base de Nanotubes de Carbone

Abstract : At only fifteen years after their discovery by Sumio Iijima, carbon nanotubes can be considered as one of the support pylons of nanotechnology. The seamless geometry and one-dimensional nature confers to carbon nanotubes exceptional structural, mechanical, electronic and optical properties. Accordingly, nanotubes are expected to pervade key applications such as field emission displays, energy storage, structural composites, nanoelectronics, sensors and actuators, etc.
This thesis focuses on the possible application of carbon nanotubes in biochemical sensing. Its main goal is to employ and extend the theoretical tools of nanotubes in designing sensing devices. Two different sensor architectures are proposed in this thesis. The first involves an electromechanical principle and can be used in measuring either piconewton forces or zeptogram masses. The second sensor is based on conductance changes of a carbon nanotube when exposed to aromatic amino acids. The validation of these two different architectures is achieved via modeling and simulation at various levels of theory.
The main effort of this thesis went into developing highly efficient simulation approaches to cope with the large number of atoms that a typical sensing device has. One of the recurrent problems we have encountered is a certain square or cubic scaling in the number of atoms when computing the quantum conductance. We have managed to render the conductance calculation linearly scaling by real-space partitioning techniques.
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https://tel.archives-ouvertes.fr/tel-00089225
Contributor : Lucie Torella <>
Submitted on : Monday, August 14, 2006 - 9:42:00 AM
Last modification on : Friday, December 11, 2020 - 8:28:04 AM
Long-term archiving on: : Tuesday, September 18, 2012 - 4:37:09 PM

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  • HAL Id : tel-00089225, version 1

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TIMA | CNRS | UGA

Citation

C. Roman. Conception et Modélisation des Dispositifs de Biocaptage à Base de Nanotubes de Carbone. Micro et nanotechnologies/Microélectronique. Institut National Polytechnique de Grenoble - INPG, 2006. Français. ⟨tel-00089225⟩

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