nanotechnology a different approach
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my sources are mainly from documentary videos on youtubeTRANSCRIPT
NANOTECHNOLOGY
THE SMALLER WORLD
THE SMALLER WORLD THE SMALLER WORLD
THE SMALLER WORLD
THE SMALLER WORLD
THE SMALLER WORLD
Things that you would have heard with the word ‘nano’ most often…
IPod nano
Our Most famous Tata nano
Well.. So what is so nano about all these stuffs?
Nothing at all….!!!!
SO WHAT IS NANO?NANO IS A GREEK WORD MEANING EXTREMELY SMALL !
A nanometer is very very small its m
A human hair is 100000nm in thickness!
Nanotechnology deals with sizes from 1-100nm range
A nanometer is one billionth of a meter!!!
What is nanotechnology?
According to new ISO working definitionNanotechnology is the application of scientific knowledge to control and use of matter at the nanoscale, where size related phenomena and processes may occur
In simple words …Its making small stuffs do big things
It is a science of assembling things atom by atom or molecule by molecule
Nanotechnology is molecular manufacturing or, more simply, building things one atom or molecule at a time with programmed nanoscopic robot arms
What if we are able to rearrange atoms?
Coal---- diamond
Sand---- computer chips
Healthy you--- hospitalized you
How it started?... The buzzword nanotechnology
Richard Feynman said …”there’s plenty of room at the bottom” in December 1959
Feynman announced a prize of $1000 to anyone who1) Is able to built a motor small enough to fit in 1/64’’*1/64’’*1/64’’* space2)Is able to write a page of text with letters so small enough for the encyclopedia Britannica to be printed on a pin head.
From there starts the Feynman prize series..Richard Feynman
1st one goes to Bill Mc lellan who made the motor with his really good hands2nd Feynman prize : in 1985 – Tom Newman @ STANFORD UNIVERSITYUsed e-beam lithography to write ‘a tale of two cities’ at the length requested by Feynman
It continues until Today .. IBM Research Team Wins Coveted Feynman Prize for
Advancing Scanning Probe Microscopy( 15th Jan 2013)
Richard E smalley working @ RICE university came up with the most famous Bucky ball , the Buckminster fullerene carbon C 60 molecule
C60 molecule-the buckyball
football
1986
He received the Nobel prize in chemistry in the year 1996
Short
history
1959Feynman gives after-dinner talk describing molecular machines building with atomic precision1974Taniguchi uses term "nano-technology" in paper on ion-sputter machining1977Drexler originates molecular nanotechnology concepts at MIT1981First technical paper on molecular engineering to build with atomic precisionSTM invented1985Buckyball discovered1986First book publishedAFM inventedFirst organization formed1987First protein engineeredFirst university symposium1988First university course1989IBM logo spelled in individual atomsFirst national conference
DNA-based 'robotic' assembly beginsFeynman Prize in Nanotechnology awarded for work in single atom manipulations and atomic switches, and for development of quantum mechanical methods for theoretical predictions of molecules and solids2011molecular robots learn to walk in any direction along a branched trackMechanical manipulation of silicon dimers on a silicon surface
ALCHEMY ………….>>>> che’mystery’>>>CHEMISTRY
An fuzzy thing.. Unclear .. unknowns
Chemistry:(mixing, boiling, cooling etc. etc.
Dealing with atoms in more approximate ways
The Launchpad for nanotechnology
Powerful tools
1.SCANNING TUNNELLING MICROSCOPE (STM)
Its inventors Gred Binnig & Heinrich Rohmer won Nobel prize in 1986
2.ATOMIC FORCE MICROSCOPE(AFM) inventors
3. SCANNING PROBE MICROSCOPE4.TRANSMISSION AND SCANNING ELECTRON MICROSCOPE 5. And many more developed in recent years
We have the tools .. But How to create nanostructures employing these tools???
First transistor invented by William- shockley, bardeen, brattain in the Christmas eve of 1947
Winners of Nobel prize in 1956
Nanomaterials:1.Buckyball , C60 molecule2.Nanotubes3.Graphene
What is Graphene?
And what about carbon nanotubes?
Applications of nanotechnologyMEDICAL APPLICATIONS: a) drug delivery b)therapy techniques c) diagnostic techniques e)anti-microbial techniques f) cell repair
Cosmetic applications
Cosmetic creams have nanoparticles in it such as SiO2,TiO2 etc.
These absorb the harmful UV radiation thus protecting the skin
It helps in useful delivery of nutrients into the skin
Applications related to Graphene
Its very strong – an atom thickness__> elephantGraphite – conductor but Graphene is not hence they have power to revolutionize solid state physicsHigh speed low noise transistors are possible because Graphene has high e- mobilityIt’s a 2-D structure with high breaking strength 200 times more durable than steel98% transparencyIncredibly flexibleUses touch screens, flexible mobiles, TV’s, display monitors and many more….
Carbon nanotubes: ( it’s a wonderful thing)
Graphene (sheet) A Carbon nanotube (1-2nm width)
Perhaps the strongest material we will ever have in the universe!(hence lighter and stronger aircrafts, space crafts etc. can be built) Conducts electricity much better than any other metals ( Cu, Al, Ag etc.) 1 single nanotube 1nm in diameter can carry 50µA of current 1µm dia2000A of current ( which is carried by 1cm Cu wire today) !!! 100’s of millions of amps can be carried very easily if we use this material It works well with any temperature ranges ( low , medium, high )
SOME OTHER APPLICATIONS OF NANOTECHNOLOGY
POWERFUL COMPUTERS: with smarter and smaller IC’s using Nanocircuitry, nanoelectronics, molecular electronics
HIGH DENSITY MEMORIES: MEMORY BITS REPRESENTED BY ATOMS- one atom representing on bit (H & F atoms) SUPER-HYDROPHOBIC COATINGS: used for clothes, metals, oil and gas equipment's, dish
antennas and many more that one can apply his ideas on. IMPROVED BATTERIES: replacing graphite anode cathode materials by porous nanoparticles
can change the charging time to few minutes (5-10), higher power densities and better efficiency MORE EFFICIENT FUEL CELL MANUFACTURING NANOCRYSTAL SOLAR CELLS: solar cells based on a coating on the substrate, these have
higher performance and higher efficiency RFID CHIPS manufactured by MIKRON ( Russian company) for metro and shopping
NANOTECHNOLOGY IN OUR EVERYDAY LIFE
if you stretch out an arm you'll almost certainly be able to grab something that employs nanotechnology
you might also be breathing in nanoparticles that have been around for many years.
"Nature is all about nanoscale structures. It starts with the cell" Silk is a prime example of naturally occurring nanotechnology Nanostructures on the surface of lotus leaves repel water This "lotus effect" is the basis behind self-cleaning windows "There are things we've been using for a long time which contain
nanosize components, like the lasers in DVD and CD players“ From the clothes and sunglasses you wear to computer hard drives and
even cleaning products, nanotechnology – often inspired by the natural world – plays a big part in the manufacture of many familiar products
coated on the surface of your plane ( aeroplane or flight) to reduce drag.
it is impossible not to encounter technology based on the manipulation of the very small.
Nanotechnology drives our future
The nano revolution!!!!!!!!!!!!!!!!!
WITH NANOTECHNOLOGY OUR TOMORROW’S
ARE BRIGHTERA PRESENTATION BY;GOKUL LAL K V1EP09EE006EAST POINT COLLEGE OF ENGINEERING &
TECHNOLOGYBANGALOREKARNATAKAINDIA