Carbon nanomaterials for nanoelectronics 2

First, this work will cover potentials of carbon nano tubes (CNTs) implementation for the next generation information devices such as displays including CNT based displays, CNT- backlighting unit (BLU) for liquid crystal display (LCD), and CNT mixed nano inorganic electroluminescent and flexible displays. This also will show imaging systems using CNT based THz wave generating source, and next generation new memory devices using CNTs

Carbon nanotubes (CNTs), descovering in 1991, by S. Iijima, were a begining of development of these nanomaterials. Many researchers from all the world, physicians, engineers, chemists, scientis work in field of nanoscience (nanomaterials and nanotechnology). Moreover carbon nanotubes possess extraordinary mechanical, electronic, transport, electrical, optical, etc. properties and nanoscale sizes (about 50-100nm in diameter and some micrones in length), Fig A.

The existence and stability of C20 molecule have been controversial for a long time. However, recently C20 molecule and bowl isomer have been experimentally produced by Prinzbach [1] et al. (2000). Later the C22 fcc phase have been experimentally verified [2] and some other C20 structures have been predicted computationally [3, 4]. In this work several different C20 based 3D structures were considered, and their electronic and elastic structures were studied using ab initio methods. The new carbon structure which we have named as a quasi-graphite phase (qgp) was proposed.

We report fabrication and detailed analysis of operation of the simplest single-molecular switch based on C60 molecule trapped in the nanogap between silver electrodes. The silver nanogap was prepared in an UHV environment by quench condensation of metallic electrodes onto a substrate held at 4 K. The C60 molecules were evaporated in situ and one was caught in the nanogap in the same vacuum cycle ensuring a clean contact between the molecule and metallic electrode. At temperatures below ~12 K the device demonstrated bistability and switching between two states with different conductance.

It has been shown that defects can essentially change the properties of graphene and carbon nanotubes. In particular, such defects as vacancies (V, V2) and adatoms (H, O, OH) has attracted much attention as those most often created during the growth and experimental treatments. In order to be able to predict their influence on the properties of the graphene/nanotube, one has to know their kinetic behaviour on its surface including cases when defects interact with each other.