By Alain Nouailhat
This publication recollects the fundamentals required for an knowing of the nanoworld (quantum physics, molecular biology, micro and nanoelectronics) and offers examples of functions in quite a few fields: fabrics, power, units, facts administration and lifestyles sciences. it really is essentially proven how the nanoworld is on the crossing element of data and innovation. Written by means of knowledgeable who spent a wide a part of his specialist lifestyles within the box, the name additionally supplies a basic perception into the evolution of nanosciences and nanotechnologies. The reader is therefore supplied with an advent to this complicated quarter with varied “tracks” for extra own comprehension and mirrored image. This guided and illustrated journey additionally finds the significance of the nanoworld in lifestyle.
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Extra resources for An Introduction to Nanoscience and Nanotechnology
In the second case, it emits two photons whose additional energy corresponds to the unique energy of the direct transition. The excited electron has the choice between these two mechanisms. If the transit via the intermediary level E1 is the quickest path, then it is clear that this is the path that will be taken by the electron. This is what happens to certain atoms when they are introduced into solid bodies. The first, most commonly known example is chromium when it is introduced into an alumina lattice, which gives us rubies.
It is still possible for an electron to be excited if it receives enough energy to progress to a superior level, if one is available and not already occupied. This energy can be supplied by a shock, in particular by light stimulation. It is the process of atomic absorption which lets us probe the atoms in order to find out more about their different states. The reverse occurs if we remove an electron from one of the outer shells. In this case, there will be a knock-on effect leading to the source of the light.
Bonds Thanks to their surface electrons, atoms form more complex edifices: molecules or solids which create new properties. The fixing between atoms is known as chemical bonding. The concept of bonding is as old as that of the atom. Its most famous interpretation comes from the Greek philosopher Democritus who saw that the bonding between atoms was a property linked to their shape, smoothness, and ability to lock onto other atoms. Chemical bonding can only really be explained with the knowledge of the quantum nature of the electron.
An Introduction to Nanoscience and Nanotechnology by Alain Nouailhat