Size effect

The shift of the edge of the light absorption band with decreasing size of semiconductor particles is called:

• Blue shift

• Red shift

• Bathochromic shift

• Hypsochromic shift

As the size of a metal nanoparticle decreases, the melting (boiling) temperature...

• Increases

• Changes at a certain size

• Remains constant

• Decreases

In a quantum well, the movement of charge carriers is limited in ____ direction(s).

• four

• one

• two

• three

If you compare the size, then

• nanoparticle < nanocluster

• nanoparticle ~ nanocluster

• nanoparticle = nanocluster

• nanoparticle > nanocluster

As the size of a quantum dot decreases, what happens to the band gap?

• Decreases

• Remains constant

• Increases

• Becomes a conduction band

In what year was graphene produced?

• 1985

• 2004

• 2010

• 1991

Allotropic modifications of carbon include...

• Graphite

• Carbon nanotube

• Fullerene

• Diamond

An example of a quantum well is...

• Carbon nanotube

• Metal nanoparticle

• Semiconductor thin film

• Quantum dot

Fullerene is

• regular icosahedron made of carbon

• spherical closed carbon nanotube

• allotropic modification of graphene

• carbon molecule

Plasmon is collective oscillation of electrons in...

• Metal

• Semiconductor

• Insulator

• Dielectric