Nanotechnology involves manipulating materials at the atomic and molecular scale. It allows materials to be constructed with great precision at the nanoscale level. While nanotechnology offers many potential benefits, there are also risks to consider regarding its impact on human health and the environment. Due to their small size, nanoparticles may enter the human body and accumulate in organs, with unknown health effects. They also pose challenges for detection and removal from the environment. Overall, nanotechnology is an emerging field that will likely play a large role in many industries and daily life in the future.

2. 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
Nano
Nanomaterial

3. 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

4. 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

5. 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

6. Classification of nanomaterials
Nanomaterials unilateral dimensional
Two-dimensional nanomaterials
Three-dimensional nanomaterials

7. Method of preparation of nanomaterials
TOP-DOWN
Method one
Photogravure
cutting
grinding
curettage

8. Method of preparation of nanomaterials
Method two
Bottom-up
Photogravure
cutting
grinding
curettage

10. Properties of nanomaterials:
Mechanical properties
Melting point Optical properties
Magnetic properties
Electrical properties

11. 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.

12. Nanotechnology in
the military field
Nanotechnology can be
used
on manufacture of
electromagnetic 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

13. 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 .

14. 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.

15. 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.

16. 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.

17. 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