Introduction

During the past few years, a new term has become a focus of attention of the whole world, Nano or as some call nanotechnology. This techneq is simply enable us to make anything imagined through row molecules article next to each other

NanoNanomaterial

What is “Nanotechnology”

There are those who describes nanotechnology as the technology that can achieve high degrees of accuracy in functions, sizes and forms of materials and components,

And another known as the science dealing with the smallest of small things himself. The term "nanotechnology" is derived from the Greek language and means the world of the very small finite Dwarfs

we can not set a specific age for the use of this technique

has been reported that the glass-makers in the Middle Ages

were using gold nonparticipant in coloring glass

The most important dates caused a change in the technique

1959

1986

2004

2003

1991

History

Traditional materials of nanomaterials

We have been rated traditional materials into several sub-categories, according to the similarity of their properties and their applications in diverse fields

1-Metals and Metal Alloys

2-ceramics

3-polymers

4-composite materials

Classification of nanomaterials

Nanomaterials unilateral dimensional

Two-dimensional nanomaterials

Three-dimensional nanomaterials

Method of preparation of nanomaterials

TOP-DOWN

Method one

Photogravure

cuttinggrinding

curettage

Method of preparation of nanomaterials

Method two

Bottom-up

Photogravure

cuttinggrinding

curettage

Properties of nanomaterials:

Mechanical properties

Melting point Optical properties

Magnetic properties

Electrical properties

Nanotechnology in Medicine

Doctors can control some small tumors that can not influence them in the past. Researchers were able to enter the nanoparticles of silver to antibiotics, it is known that silver is able to kill about 650 bacteria without harming the human body.

Nanotechnology in the military field

Nanotechnology can be usedon manufacture ofelectromagnetic waves that can once contact with the body to hide it like a plane or car and then the radar can not see and therefore disappearance

Touch screen

With the discovery of many new materials with distinctive characteristics, and become Nanotechnology is used in all industry and technology , we can say now , that touch screens have cahnged the shape of our lives ,and now nanotechnology will change it radically more

Thanks to many materials with structures and attributes , such as Carbon nanotubes and Graphene , the characteristics and advantages of touch screens will become better , in terms of responding to the touch , and manifesting accuracy , and power consumption , and recently can be manufactured in atransparent manner .

OBSTACLES

The difficulty of this technique to obtain accurate measurements when you reach the level of the atom.

It is difficult to control the atoms formed after the division of materials.

Risks to human

Despite the useful features of these small particles it is based on the

small size, any particle size of 300 nm has the ability to enter the

human body smoothly and without any resistance, as it can spread

and cause damage in the body, and a particle size of 70 nm

can enter in the cell nucleus

Some experiments have shown that when the particles enter the human

body, they accumulate in the brain and blood cells and nerves, which

means that it is possible these particles classified under the destructive

substances to the human body.

Risks to the environment

  The most important nanotechnology risks to the environment

in two forms, one bio accumulation, which arises from the

accumulation of nano-materials unwanted and the other in

terms of their small size would be difficult to detect and

cleaned and removed from the environment.

ConclusionConclusion

Some states have begun opening of institutes and

centers specialized in the field of nanotechnology and

it is wrong to do what many people do to stay away

and not to approach this technique fear of not being

understood in spite of its simplicity, and like it or not,

this technology and its applications will be the focus of

our daily lives in the near future