Nanotechnologies by Michel Wautelet et al.

By Michel Wautelet et al.

This up-to-date moment variation places nanotechnologies into viewpoint through explaining concerns in overall healthiness, environmental and army software domain names, and discusses the know-how within the context of present media and moral debates. It additionally introduces the bold, and maybe nearly utopian, NBIC software (Nanotechnology, Biotechnology, details know-how and Cognitive Science); an initiative that foresees the 'reunification' of technology via encouraging collaboration between experts of alternative medical domain names.

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The main fields of interest are nanoelectronics, sensors, nanomachines and materials. In future missions, spacecraft will be autonomous and smart, requiring computers that are powerful and compact, that operate using very low power (particularly for missions to faraway planets), and that are resistant to cosmic radiation. Furthermore, the computing power of onboard computers must be very high in order to assess flight data, apprehend structural aspects, understand the environment and react appropriately.

Nano: “chapter01” — 2009/3/20 — 16:12 — page 18 — #18 Chapter 2 Atomic structure and cohesion Particles of between 1 and 100 nm have specific physicochemical properties. These nanoparticles are in an intermediate state between solid and molecule. In nanoparticles, the number of atoms at the surface, Ns , is not negligible compared with the number of atoms in the centre of the particle, Npart . Consequently, a spherical particle with a radius equal to r interatomic distances, is characterized by the ratio Ns /Npart = 3/r.

From nanoelectronics to biotechnology, from space applications to the protection of the environment to petrochemistry or to the development of materials with specific properties, the possibilities are enormous. 3. 1 Nanoelectronics As we mentioned earlier, miniaturization of microelectronics is limited. If we want the trend to continue, we must find something else. This is the field of nanoelectronics coupled with molecular and quantum computers. Behind this single word lie many concepts with the common prefix ‘nano’.

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