Describe the resolution of the scanning electron microscope, Physics

Assignment Help:

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.


Related Discussions:- Describe the resolution of the scanning electron microscope

Derive the relation at spherical surface concave, Derive the mathematical r...

Derive the mathematical relation connecting n,u,v and R for refraction at a spherical surface concave towards a point object in a denser medium.

Dimensional analysis, can you please give me a step wise answer for finding...

can you please give me a step wise answer for finding the dimension of impulse

Evaluate the phase difference, A forced harmonic oscillator is at resonance...

A forced harmonic oscillator is at resonance with some periodic force. Evaluate the phase difference between the driving force and the velocity of the oscillator?

State kirchoffs second law in electricity., Q. State Kirchoff's second law ...

Q. State Kirchoff's second law in electricity? Kirchoff's second law (voltage law) the algebraic total of the products of resistance as well as current in each part of any

Problem solving, two blocks with masses 4kg and 8kg cre connected by a mass...

two blocks with masses 4kg and 8kg cre connected by a mass less string and slide down a 30degree inclined plane. the coefficient of kinetic friction between the 4kg block and the p

Fermi paradox, Fermi paradox (E. Fermi): E. Fermi's conjecture, simpli...

Fermi paradox (E. Fermi): E. Fermi's conjecture, simplified along phrase, "Where are they?" questioning that if the Galaxy is filled along with technological and intelligent c

Find the ratio of radii of the two wires, Q. Two wires of same material and...

Q. Two wires of same material and same length have resistances 5 and 10 respectively. Find the ratio of radii of the two wires. R = ρl / A = ρl / πr 2  R 1 = ρl / A = ρl

What is alpha decay and beta decay, The graph below shows a sequence of alp...

The graph below shows a sequence of alpha and beta decays, labeled 1, 2, 3, and 4. Consult Table 30-1 as required.   a) Which shows alpha decays, and which represen

Projectile, formula for maximum height.

formula for maximum height.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd