login
You are not logged in.
search:
AMSER logo



Title: 50 Years of Electron Biprism -50 Years of Exciting Electron Physics PDF
Url: https://www.jstage.jst.go.jp/article/ejssnt/2/0/2_0_52/_pdf
Creator: Lichte, Hannes
Publisher: Surface Science Society of Japan
Description: In 1953, Gottfried Moellenstedt invented the electron biprism, more or less by accident, with the serendipity characteristic to him: Aiming at dark-field imaging in an electron microscope, he stretched a thin tungsten wire across the objective aperture to block off the zero beam. However, instead of a dark field image, because of inadvertent charging of the wire under the beam, he found two images of the ZnO-needles serving as an object. Instead of trying the dark field imaging over and over again, he asked what the effect would be if the obtained two images were superimposed. Is coherence given? Moellenstedt, educated by Walther Kossel in diffraction of electron waves, had a vision: Together with his PhD-student Heinrich Dueker, he developed the electron biprism, consisting of a 1 micron m thin wire deliberately chargeable by means of a voltage source, as a beam splitter for coherent superposition of the electron waves passing the filament on the right and on the left. In 1955 they published the first results showing biprism interference fringes [G. Moellenstedt and H. Dueker, Naturwiss. 42, 41 (1955)], which, since then, gave access to the understanding of electron waves and their use for analysis of object structures up to atomic dimensions.



Target Audience: 2-4 Year College Faculty/Administrators
LC Classification: Science -- Physics -- Electricity and magnetism -- Electricity -- Physics of electrons, protons, and other particles
Science -- Physics -- Nuclear and particle physics. Atomic energy. Radioactivity -- Elementary particle physics -- Special nuclear and subnuclear particles, antiparticles, and families of particles, A-Z -- Electrons
Science -- Physics -- Optics. Light -- Physical optics -- Holography -- Electron holography
GEM Subject: Science -- Engineering
Vocational Education -- Trade and industrial
Key Concept: Physics -- Electrons
Key Concepts Complete: Yes
Resource Type: Reading Materials
Science Materials
Format: pdf
Audience: College/University Instructors
Higher Education
Secondary Education
Students
Teachers
Technical School First Cycle
Technical School Second Cycle
University First Cycle
University Second Cycle
Vocational Training
Language: English
Rights: The Surface Science Society of Japan
Access Rights: Free access
Date Of Record Release: 2010-01-04 03:00:02 (W3C-DTF)
Date Last Modified: 2012-08-20 12:04:54 (W3C-DTF)
Source Type: ATE Center
Source: National Center for Manufacturing Education
Full Record Views: 143
Resource URL Clicks: 20
Cumulative Rating: NOT YET RATED
Report a Problem with this Resource Record

Resource Comments

(no comments available yet for this resource)

user login
Username:
Password:
why log in?
Manage your resources
Save, organize, and share resources that you find.

Subscribe to bulletins
Automatically be notified about new resources that match your interests.

It's easy, fast, and FREE!
AMSER =
FREE ONLINE
RESOURCES
for the
CLASSROOM

Copyright 2014 Internet Scout Resource Metadata
Copyright 2014 Internet Scout
NSF NSDL University of Wisconsin Internet Scout
Leave Feedback
http://amser.org/