Introduction to Nanomaterials

 Introduction to Nanomaterials

 In this lecture a very brief introduction of nanoscale materials also called nanoparticles or nanomaterials has been described in detail. Moreover their classification has been described for more understanding. We will focus on inorganic nano materials mainly. 

Nanomaterials The Concept? Nobel Laureate Richard Feynman in his visionary lecture“ There is plenty of room at the bottom” Although the term “nanotechnology” had not appeared on the horizon, Feynman said: “What I want to talk about is the problem of manipulating and controlling thing  small scale… What I have demonstrated is that there is room—that you can decrease the size of thing  practical way… Richard Feynman further explained that “I will not discuss how we are going to do it, but only what is possible in principle.

Introduction to Nanomaterials

We are not doing it simply because we haven’t yet gotten around to it.” Now-a-days scientists have learnt that the manipulation of atoms, molecules, and clusters on surfaces is feasible and that new fundamental of science governs the properties of nano objects. The term “nano” is derived from the Greek word “Nanos” for “dwarf”. This etymology, and its placement on the metric scale (1nm = 10-9 m), shows that tiny dimensions not visible to naked eye, beyond the normal limits of our observation. The diameter of hair (100 μm) to the buck-minster fullerene (1 nm) shows the variation of diameter of a material .Nanoscale material are defined as materials having at least one dimension in the 10–100 nm range, in which nanoparticles are the major investigated subjects. The term “nano-particle” (earlier termed small particles )first appeared in the1980s.

Ancient stained-glass makers knew that by putting varying, tiny amounts of gold and silver in the glass, they could produce the red and yellow found in stained-glass windows. Similarly, today’s scientists and engineers have found that it takes only small amounts of a nanoparticle, precisely placed, to change a material’s physical properties.

CLASSIFICATION

 1. Dimensionality 

2. Morphology 

3. Composition

CLASSIFICATION  

1. Dimensionality

 2. Morphology

 3. Composition

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