NanoTech random 1

If the size of letters is decreased to 10%, on the same page

• 10 times more text can be written.
• 100 times more text can be written.
• 1000 times more text can be written.
• √2 times more text can be written.

How much is the wavelength of an electron with kinetic energy of 100keV?

• ≈ 50nm
• ≈ 0,05nm
• ≈ 50μm
• Electron is a particle, it has no wavelength.

Nanotechnology

• is a multidiciplinary field including physics, chemisty and biology.
• was overadvertised around 2000, but has no influence on science today.
• started with the realization Scanning Electron Microscope.
• focuses on objects which are smaller than 1μm.

What is smaller a FET transistor or a typical virus?

• FET transistor
• virus

Interferences play an important role in

• bright field image of TEM.
• dark field image of TEM.

Diffraction experiments with TEM has the advantage

• of precise determination of lattice constant.
• to examine at nanoscale.
• to address complex heterostructures.
• that the structure factor is sharper.

According to the Moore law, the number of transistors per area doubles every ...

• 6 months, approximately.
• 1 year, approximately.
• 2 years, approximately.
• 4 years, approximately.

What is the rate determining step of the LPCVD process?

• diffusion of reagents
• adsorption on the solid surface
• chemical surface reaction
• desorption from the solid surface

Spin relaxation

• can take place at scattering centers, due to Lorentz-force.
• in case of broken inversion symmetry is reduced for longer mean free path.
• is not sensitive to the presence of magnetic impurities.
• can take place in the presence of spin-orbit interaction and scatterings.

In a cubic crystal phonon modes in the Brillouin zone center are

• five-fold degenerate.
• three-fold degenerate.
• two-fold degenerate.
• non-degenerate.