  Nanotechnologies are attracting increasing investments from both governments
and industries around the world, which offers great opportunities to explore
the new emerging nanodevices, such as the Carbon Nanotube and Nanosensors. This
technique exploits the specific properties which arise from structure at a
scale characterized by the interplay of classical physics and quantum
mechanics. It is difficult to predict these properties a priori according to
traditional technologies. Nanotechnologies will be one of the next promising
trends after MOS technologies. However, there has been much hype around
nanotechnology, both by those who want to promote it and those who have fears
about its potentials. This paper gives a deep survey regarding different
aspects of the new nanotechnologies, such as materials, physics, and
semiconductors respectively, followed by an introduction of several
state-of-the-art nanodevices and then new nanotechnology features. Since little
research has been carried out on the toxicity of manufactured nanoparticles and
nanotubes, this paper also discusses several problems in the nanotechnology
area and gives constructive suggestions and predictions.
