Lecture 1 part 2

The molecular beam epitaxy is not characterized by ...?

• a high purity of created structures

• a small number of defects

• any shape of created structures

• ultra high vacuum

What is the feature of the metal organic chemical vapor deposition?

• No vacuum required

• Only flat structures can be fabricated

• Several growth cycles should be used to fabricate a multilayer structure

What the method can be used to form the thinnest film?

• ALD

• MBE

• CVD

What method cannot be used with a substrate of different shapes?

• ALD

• MBE

• CVD

A chemical method for producing graphene by cutting nanotubes

• Using acids to break C-C bonds

• Metal nanoparticles can “cut” the nanotube lengthwise like scissors (ножницы)

• Nanotubes are embedded (внедряются) in a polymer matrix and they are treated with Ar plasma

• Electric current pulses are passed along the nanotube

Catalytic method for producing graphene by cutting nanotubes

• Using acids to break C-C bonds

• Metal nanoparticles “cut” the nanotube lengthwise like scissors (ножницы)

• Nanotubes are embedded (внедряются) in a polymer matrix and they are treated with Ar plasma

• Electric current pulses are passed along the nanotube

Physicochemical method for producing graphene by cutting nanotubes

• Using acids to break C-C bonds

• Metal nanoparticles can “cut” the nanotube lengthwise like scissors (ножницы)

• Nanotubes are embedded (внедряются) in a polymer matrix and they are treated with Ar plasma

• Electric current pulses are passed along the nanotube

Electrical method for producing graphene by cutting nanotubes

• Using acids to break C-C bonds

• Metal nanoparticles can “cut” the nanotube lengthwise like scissors (ножницы)

• Nanotubes are embedded (внедряются) in a polymer matrix and they are treated with Ar plasma

• Electric current pulses are passed along the nanotube

Due to graphitization of the SiC surface … graphene is formed on the C - face

• Single-layer

• Bilayer

• Multilayer

During graphitization of the SiC surface, films grown on the Si - face

• have a uniform appearance

• have the appearance of flakes (чешуйки)

• have high electron mobility