Describe the resolution of the scanning electron microscope, Physics

Describe the resolution of the scanning electron microscope.

Resolution of the SEM (scanning electron microscope):

The spatial resolution of the SEM depends onto the size of the electron spot that in turn depends onto both the wavelength of the electrons and the electron-optical system that produces the scanning beam. The resolution is also restricted by the size of the interaction volume, or else the extent to that the material interacts along with the electron beam. The interaction volume and spot size are both large compared to the distances among atoms, therefore the resolution of the SEM (scanning electron microscope) is not high sufficient to image individual atoms, as is probable in the shorter wavelength (that is higher energy) transmission electron microscope (TEM). The scanning electron microscope has compensating advantages, while, including the capability to image a comparatively large region of the specimen; the capability to image bulk materials (not just thin foils or films); and the variety of analytical models obtainable for measuring the composition and properties of the specimen. Depending onto the instrument, the resolution can fall somewhere in between less than 1 nm and 20 nm. The world's highest scanning electron microscope resolution is obtained along with the Hitachi S-5500. Resolution is 0.4nm at 30kV and 1.6nm at 1kV. Usually, SEM images are easier to interpret than TEM images.

Posted Date: 9/12/2013 5:43:21 AM | Location : United States







Related Discussions:- Describe the resolution of the scanning electron microscope, Assignment Help, Ask Question on Describe the resolution of the scanning electron microscope, Get Answer, Expert's Help, Describe the resolution of the scanning electron microscope Discussions

Write discussion on Describe the resolution of the scanning electron microscope
Your posts are moderated
Related Questions

Q. (a) Determine the'effective  focal length' of the grouping of the two lenses in Exercise 9.10 if they are placed 8.0 cm a part with their principal axes  coincident. Performed t

how to you calculate the inducatnce on a balanced delta circuit?

Davisson and Germer scattered electrons from a crystal of nickel.  The scattered electrons formed a strong diffraction pattern. What important conclusion was drawn from this experi

Displacement: - The modification in position of a body in a certain direction is known as displacement. It is a vector function and its unit in SI system is meter.

When do you use Wn instead of work - A?

bcs theory of superconductivity.

What is elasticity explain it briefly..

Hi Do you have expert can help me to solve coupl problems from classical electrodynamics Jackson ch11 and ch12

Explain the presence of unmodified radiation in Compton scattering.