Download e-book for iPad: Aberration-Corrected Analytical Transmission Electron by Susan Brooks(eds.)

By Susan Brooks(eds.)

ISBN-10: 0470518510

ISBN-13: 9780470518519

ISBN-10: 111997884X

ISBN-13: 9781119978848

The publication is anxious with the speculation, heritage, and useful use of transmission electron microscopes with lens correctors that could right the consequences of round aberration. The e-book additionally covers a comparability with aberration correction within the TEM and functions of analytical aberration corrected STEM in fabrics technological know-how and biology. This e-book is vital for microscopists all for nanoscale and fabrics microanalysis in particular these utilizing scanning transmission electron microscopy, and similar analytical recommendations corresponding to electron diffraction x-ray spectrometry (EDXS) and electron strength loss spectroscopy (EELS).Content:
Chapter 1 basic advent to Transmission Electron Microscopy (TEM) (pages 1–19): Peter Goodhew
Chapter 2 creation to Electron Optics (pages 21–38): Gordon Tatlock
Chapter three improvement of STEM (pages 39–53): L. M. Brown
Chapter four Lens Aberrations: prognosis and Correction (pages 55–87): Andrew Bleloch and Quentin Ramasse
Chapter five thought and Simulations of STEM Imaging (pages 89–110): Peter D. Nellist
Chapter 6 information of STEM (pages 111–161): Alan Craven
Chapter 7 Electron power Loss Spectrometry and effort Dispersive X?ray research (pages 163–210): Rik Brydson and Nicole Hondow
Chapter eight purposes of Aberration?Corrected Scanning Transmission Electron Microscopy (pages 211–240): Mervyn D. Shannon
Chapter nine Aberration?Corrected Imaging in CTEM (pages 241–261): Sarah J. Haigh and Angus I. Kirkland

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Additional resources for Aberration-Corrected Analytical Transmission Electron Microscopy

Example text

1) Where λ is wavelength, nr the refractive index of the intervening medium and α is the collection semiangle of the lens/aperture and nr sin α is known as the numerical aperture of the lens. 3. Adjacent points in the image would each have a disc associated with them, so one measure of resolution would be how close the points can be brought together, while still being viewed as separate sources. 2 Airy ring, formed by white light travelling through a 1 mm diameter aperture. 3 Intensity distribution across an Airy ring.

These requirements imply that, for most materials to be imaged or analysed at atomic-column resolution, the appropriate thickness will lie in the range up to 50 nm. It would also be helpful if specimens prepared from the bulk could be perfectly flat and parallel-sided with no contamination or surface amorphised layer, while nano-particles could be of regular shape (so that their thickness is calculable from their projected shape and size). Every specimen should resist both ionization damage and displacement damage by the primary beam.

It was realised very early on that the simplest way forward was to acquire images and spectra simultaneously point-by-point, but the electron guns available then were not bright enough to do this in an acceptable time. 9), the source of the electron beam is almost of millimetre dimensions, and must be hugely demagnified if a beam of nanometre dimensions is to be obtained. 10), where the source of the current is of atomic dimensions. But such guns, based on electron tunneling, require upgrading the vacuum system of DEVELOPMENT OF STEM 41 microscopes to ultra-high-vacuum (UHV) standards, technically very difficult and costly.

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Aberration-Corrected Analytical Transmission Electron Microscopy by Susan Brooks(eds.)


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