By RISHAV GARGASSOCIATE PROFESSORBADDI UNIVERSITY,BADDI

What Is Nanotechnology

What is Nanotechnology?

Nanotechnology - art and science ofmanipulating matter at the nanoscale

One nanometre (nm) is one billionthof a metre, or one millionth of a millimetre.

A human hair is 80,000nm thick.

A red blood cell is 5,000nm in diameter.

A DNA molecule is 2.5nm wide.

10 hydrogen atoms arranged side by side measure 1nm.

Nano MaterialsTiO2 - white pigment and is an excellent reflective coating. hydrophilic and gives self cleaning properties from concrete to glass. anti-fogging coatings or self-cleaning windows.

Carbon Nano Tubes(CNT): are a form of carbon, cylindrical in shape, and their name comes from their nanometre diameter. They can be several millimetres in length and can have one layer or wall (single walled nanotube) or more than one wall (multi walled nanotube). It is being used to strengthen and monitor concrete.

NANO-SILICA

In 2004, Lab tests and production tests proved that the nano silica produced better results than micro silica, and a liter bottle of the product was equivalent to a barrel full of micro silica, extra cement and super plasticizing additives.

Todays Nano-ProductsPaints, waxes and coatings to protect against corrosion, scratches and radiationProtective and coatings for eyeglasses and carsMetal-cutting toolsSunscreens and cosmeticsLonger-lasting tennis balls and longer-distance golf ballsLight-weight, stronger tennis racquets, skis, and bicycle frames

Todays Nano-ProductsClothing and mattresses Stain resistant and wrinkle resistant fabricDental-bonding agentBurn and wound dressingsSocks contain nanoparticles of silver. These particles help kill the bacteria that makes our feet smell. Batteries and fuel cells

CONCRETEGLASSSTEELCOATINGS

IN CONCRETE

IN CONCRETE NANO PARTICLES MAINLY USED ARE:-

NANO SILICA.TITANIUM DIOXIDE.CARBON - NANOTUBE.

NANO SILICA

Fly ash

CARBON-NANOTUBE

TITANIUM DIOXIDE

NANOTECHNOLOGY IN GLASSTio2 is used in nano particle form to coat glassing since it has sterilizing and anti- fouling properties .

Fire protective glass is another application of nanotechnology in which clear in tumescent layer sandwiched between glass panel s (an inter layer ) formed of fumed silica nano particles which in turns into a regid a opaque fire shield when heated .

WATER REPELLENT PROCESS

NANOTECHNOLOGY IN STEEL NANOTECHNOLOGY IN STEEL IT MAINLY DEALS WITH .. FATIGUE CABLES JOINTS WELLS

FATIGUEIt is a significant issue that can lead to the structural failure of steel subject to cyclic loading .

stress risers are responsible for initiating cracks from which fatigue failure results and the addition of copper nano particles reduces the surface unevenness of steel which then limits to the number of stress risers hence fatigue cracking

CABLES, JOINTS & WELDS CABLE : The refinement of the phase of steel to a nano size has produced stronger cables high strength steel cables being used in car tyres are used in bridge construction and pre casting concrete.JOINTS : High rise structure require high strength joints this in turn leads to need for high strength bolts which are generally gone through quenching and tempering martensite.WELDS : Heat effected zones adjucent to wells can be brittle and fail without warning when subjected to sudden dynamic load when addition of nano particles of magnesium and increase weld toughness.

NANOTECHNOLOGY IN COATINGS

NANO IN COATINGNano technology is being applied to paints and insulating properties, produced by the addition of nano-size cells ,pores and particles .This type of paint is used at present for corrosion protection under insulation since it is hydrophobic and repels water.

*so what is NT?*by definiton as you can see its the art of manipulating matter at the nanoscale level

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