Nanomaterials A212

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

Why the properties of nanomaterials are different significantly compared to bulk materials?

• Increased relative surface area

• Decreased relative surface area

• Increased lattice parameters

• Lower down the melting temperature

Why the properties of nanomaterials are different significantly compared to bulk materials?

• Quantum effect

• Confinement effect

• Synergistic effect

• Avalanche effect

Nanomaterials may exhibit different properties compare to bulk except;

• Reduced lattice constants

• band gap broadening

• exhibit catalytic properties

• Increasing melting temperature

1. Monolithic are considered as zero-dimensional (0-D) nanomaterials

• Yes

• No

Nanowires are considered as One-dimensional (1-D) nanomaterials

• Yes

• No