In:
Proceedings, annual meeting, Electron Microscopy Society of America, Cambridge University Press (CUP), Vol. 48, No. 1 ( 1990-08-12), p. 218-219
Abstract:
There are many possible strategies of photoelectron imaging. The common theme is to form the image with electrons that have been photoejected from a surface by UV light (i.e. the photoelectric effect). Currently the highest resolution method is photoelectron microscopy (PEM), which is also called photoemission electron microscopy (PEEM). This approach has its roots in the early developments in electron microscopy in Germany. However, modern ultra high vacuum technology and image enhancement techniques have made possible significant advances in the capabilities of photoelectron imaging. Photoelectron microscopy is the electron optical analog of fluorescence microscopy. Light is focused on a specimen and the emitted electrons are accelerated, and the image magnified by means of an electron optical system. The main advantage of photoelectron microscopy is the source of contrast. Small differences in the bonding of outermost electrons can cause significant contrast between molecules that would be otherwise difficult to detect. Biological systems are rich in macromolecules that differ in molecular ionization potentials and this source of information remains largely unexplored.
Type of Medium:
Online Resource
ISSN:
0424-8201
,
2690-1315
DOI:
10.1017/S0424820100179841
Language:
English
Publisher:
Cambridge University Press (CUP)
Publication Date:
1990
SSG:
11
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