In this video carbon nanotubes have been prepared by fusing carbon rods at high temperature.

Nanoelectronic is concerned with understanding and exploiting the properties of devices, which have dimensions at the nanometre scale.
Microelectronics will gradually evolve into nano-electronic. In fact, this has already happened as can be seen from the smallest feature size of present integrated circuits, which is below of one micrometer. It is currently believed that optical lithography can be used for ground rules down to 150 nm and might even be used for the 100 nm generation and below. This would imply an increasing process and mask complexity, and consequently, increasing the cost.
Molecular-scale electronic has been widely touted as “the next step” in electronic miniaturization, with theory and research suggesting that single molecules may have the capability to take the place of today’s much larger electronic components.
Therefore, what are the advantages of scaling down of devices?
