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Copy of Nanotechnology

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Khaled Farroh

on 23 September 2018

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Transcript of Copy of Nanotechnology


Methods of
nanoparticles
synthesis
Dangers of Nanotechnology
Introduction to Nanotechnology
Objectives
Nanotechnology
What's Nanotechnology?
Dr. Khaled Yehia Farroh
Nanotechnology is the study of the controlling of matter on an
atomic and molecular scale
. Generally nanotechnology deals with structures sized between
1 to 100 nanometer
in at least one dimension, and involves developing or modifying materials or devices within that size
.

History of Nanotechnology
Physical methods
PVD Techniques
CHEMICAL METHODS OF SYNTHESIS
Agriculture
Health
Environment

Dangers of
Nanotechnology
Conclusion and Summery
Presented by:
Health
A study on aluminum oxide nanoparticles showed that inhalation caused inflammation in rat lungs.
Environment
If these particles released into the air or the water. They will return into toxins and cause a pollution.
Nanotechnology
Characterization of
Nanotechnology
Nanotechnology
Applications
History of
Nanotechnology
‘Nano’- Greek word means ‘Dwarf’

1 nm = one billionth (10ˉ⁹) of metre

Size range between 1 and 100 nm

Nanoscale
METHODS OF NANOPARTICLE
PRODUCTION
Mechanical
High energy ball milling
Melt mixing


Vapour

Physical vapour deposition
Carbon nanotubes can be mixed into the polymer melt by melt mixing
Physical vapor deposition
working principle
PVD processes are carried out under
vacuum
conditions and
High temperature
is required to vaporize the material. The process involved three steps:
1.Evaporation
2.Transportation
3.Deposition

1- Sputter deposition
2-

Evaporative deposition
Electron beam vapor deposition
Pulsed laser deposition
3- Ion induced deposition
4-Cathode Arc Deposition
Electron beam vapor
deposition
Electron beam is generated
by tungsten filament.

Material is placed in
Graphite or tungsten crucible

deposition is carried out
under high vacuum.
Pulsed laser deposition
High power
laser
is used for deposition.
Argon or neon is used for inert atmosphere.
High vacuum is formed.
laser is focused by lens.
Sputter deposition
* Plasma glow,
ion accelerator
or radioactive emitting is used to evaporate material.
*
argon gas is used for inert atmosphere.
*Types of sputtering
1- Chemical and etching sputtering
2- Electronic sputtering
3- Potential sputtering
cathodic arc deposition
high power arc directed at the target material
blasts
away some into a vapor.
Biological synthesis
Rapid synthesis
controlled toxicity
controll of size
economical and eco-friendly approach
Biological system for nanoparticles
The bioreduction of metal ions by combinations of biomolecules found in the extracts of certain organisms (e.g., enzymes/proteins, amino acids, polysaccharides and vitamins) is environmentally benign
Bacterial biosynthesis
Mainly extracellular
Silver nanoparticle
Gold nanoparticle
Cadmium
fungal and Yeast
Plants and Plant extracts as a tool for nanoparticles
1- Coprecipitation
2- Sol-gel Processing
3- Hydrothermal/Solvothermal
4- Microwave Synthesis
5- Sonochemical
1- Coprecipitation method
2- Sol-gel Processing
3- Hydrothermal/Solvothermal
4- Microwave Synthesis
Add 10 mL of 1.0% polyvinylpyrrolidone (PVP) in 100% ethanol to a small Erlenmeyer flask. Add 200 µL 0.10 M AgNO3 & Cover loosely.
Place the flask in the center of the microwave oven. Microwave for 5 seconds at 100% power.
Wait several minutes to see if the solution turns yellow. The color will continue to darken with time.
5- Sonochemical
Characterization of Nanotechnology
Applications of nanotechnology
Medicine
Cancer treatment
Bone treatment
Drug delivery
Drug development
Medical tools
Diagnostic tests
Imaging

Applications of nanotechnology
More efficient and cost effective technologies for energy production
Solar cells
Fuel cells
Batteries
Energy
Foods and beverages
Advanced packaging materials
sensors for food quality testing
Appliances and textiles
Stain proof
water proof and wrinkle free textiles
Household and cosmetics
scratch free products, paints, and better cosmetics

Consumer Goods
Applications of nanomaterials
Methods of nanoparticles synthesis
Manager of Nanotechnology and Advanced Material Central Lab. (NAMCL)
Introduction to Nanotechnology.
Methods of nanoparticles synthesis
Characterization of Nanotechnology
Nanotechnology Applications.
Dangers of Nanotechnology.
Top-Down Method
Bottom-Up Method
METHODS
Melt mixing
2. Scanning Electron Microscope (SEM)
1. Transmission Electron Microscope (TEM)
3. Scanning tunneling microscope (STM)
X-Ray Characterization
X-Ray Diffraction (XRD)
Magnetic Properties
Zeta Sizer Nano
UV-Vis-NIR spectrophotometer
Properties of nanoparticles
Manifestation of novel phenomena and properties, including changes in:
Nanotechnology is already making today’s products:
Stronger
Faster
Smaller
More Durable
Lighter






Types of nanomaterials
1- Water Treatment
2 -Land Reclamation
3- Nanofertilizers
3- Nanopesticides
5- Nano foods
6- Nanobiosensors
Full transcript