Nanomaterials

Nanomaterials have nanostructure in the range of

• 100 to 1000 nm

• 1 to 100 nm

• 1000 to 10000 nm

• Above 10000 nm

In nano phase by decreasing the grain size the surface to volume ratio

• Increases

• Decreases

• Increases exponentially

• Remain constant

Materials in which atoms are in nano phase in all the three axes are called

• Quantum dot

• Quantum well

• Quantum wire

• Quantum surface

Materials in which atoms are in nano phase along one axis are called

• Quantum dot

• Quantum well

• Quantum wire

• Quantum surface

Materials in which atoms are in nano phase along two axes are called

• Quantum dot

• Quantum wire

• Quantum surface

• Quantum well

The process of bringing a bulk material to nano phase material is called

• Bottom up process

• Top up process

• Top down process

• Middle down process

Building atom by atom to form nano phase material is called

• Bottom up process

• Top up process

• Top down process

• Middle down process

The process by which a bulk material is grinded into nano particles is called

• Mechanical welding

• Mechanical soldering

• Mechanical rolling

• Mechanical crushing

A bulk material is heated to gaseous state and deposited on hot solid surface is called

• Asma arcing technique

• CVD technique

• Laser synthesis

• Inert gas condensation

At nano phase the electronic bonds become

• Narrow

• Wide

• Thick

• Thin