Nanotechnology presentation

NANOTECHNOLOGY

P R E S E N T E D B Y

FARES M.ALMAKRAHY

M A S T E R S T U D E N T

F A C U L T Y O F A G R I C U L T U R E

A L E X A N D R I A U N I V E R S I T Y

S E P T E M B E R 2 0 1 3

S U P E R V I S E R

PROF. SALAH A. SOLIMAN

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Definition

Nanotechnology (nanotech)

Is the study of the properties of molecules and compounds that do not exceed their standards of 100 nm.

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http://www.nano.gov

Is the science that deals with the treatment material on the atomic and molecular scale.

Nanotechnology interested inventing new technologies and means of its dimensions are measured by the Nanometer

Definition

http://www.nano.gov 4

Nanometer:

0.001Mm.

It is part of a millionth of a millimeter.

It is part of a billionth of a meter.


Is the engineering of functional systems at the molecular scale.

Nano science and nanotechnology one of the areas of materials science


http://crnano.org/whatis.htm

Nano scale: Includes dimensions of nanometers in length and one up to the 100-nm.

Nano science: is the study of the properties of molecules and compounds that do not exceed their standards of 100 nm.

Nanotechnology: is the application of these sciences and engineered to produce useful inventions.


Some things nanometer scale

Object Size (nm)

Carbon nano tube 2

Width of DNA 2.5

Virus 100

Width of Human Hair 75,000

Head of a pin 2 million

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http://www.epa.gov/oppfead1/cb/ppdc/2010/april2010/session1-nanotec.pdf

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Nanotechnology applications

The ten most important applications of nanotechnology need human.

1 - Energy storage, production and transfer.

2 - To improve Agricultural production.

3 - Treatment of drinking water.

4 - Diagnosis.

5 - Delivery of medicines.

The Jonet Centre for Research Ethics at the University of Toronto and published the journal PLoS Medicine

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6 - Food processing and storage.

7 - Addressing air pollution.

8 - Construction.

9 - Health surveillance.

10 - Resistance to pests and insects.

The Jonet Centre for Research Ethics at the University of Toronto and published the journal PLoS Medicine

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Ancient Egyptians

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Medicine

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Water purification

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Communication Technology

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Carbon Nanotubes

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Applications of Carbon Nanotubes

Water and Oil Purifiers

Structural Support

Improves Efficiency

Super capacitors

Cell Therapy

Bone Scaffolding

Synthetic Muscles

Biosensors a.k.a. ‘Nano-noses’

http://www.technewsdaily.com/16158-10-uses-for-carbon-nanotubes.html 20

Nano materials are applied in almost all fields. Examples include:

Conductors and semi-conductors

Medical devices

Sensors

Coatings

Pesticides

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Nanotechnology and Pesticides

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How is the preparation of Nanopesticides :

Gold

Silver

Copper

Until they reach the size of nanoparticles

When you get to the size of nano-particles there is a change in the physical and chemical properties of materials

Acquire new properties of materials in the case of nanotechnology

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Size vs. Surface Area

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Nanosilver

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Advantages of Nanopesticides

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Limited amount of pesticides used in control pest.

Limited use of active substances in the processing of pesticides.

Low cost.

High efficiency in control pest.

EPA Report

Nanomaterials behave differently

Size can influence toxicity

Gold has very different toxicities when nanosized

Nano copper is more acutely toxic than micro copper

Shape may also influence exposure and toxicity

We still have a lot to learn

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The United States Environmental Protection Agency (U.S. EPA)

Office of Pesticide Programs (OPP)

Is a regulatory office that is responsible for pesticides

registration for distribution and sale in the U.S

Why is OPP Concerned?

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Potential Human Health Concerns:

Dermal absorption (so small they may pass through cell membranes)

Inhalation (go to the deep lung and may translocateto the brain i.e, could cross the blood brain barrier)


Why is OPP Concerned?

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Potential Environmental Concerns:

High durability or reactivity of some nanomaterials raises issues on the fate in environment

Lack of information to assess environmental exposure to engineered Nanomaterials


Many of the research and scientific journals did not mention the clear evidence about the danger of nano-particles on human and environmental, but there are many research-based risk assessment of nanoparticles

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Nanopesticides registered

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Nanosilver in 2010

Registered in the U.S. Environmental Protection Agency

Public health pesticide

http://www.epa.gov/pesticides

Nanotechnology in Egypt

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Nanotechnology Video

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Nanotechnology Video - YouTube.mp4

Any questions

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