Treatment of surfaces with slow electrons

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F16%3A00460200" target="_blank" >RIV/68081731:_____/16:00460200 - isvavai.cz</a>
Result on the web
<a href="http://www.trends.isibrno.cz/" target="_blank" >http://www.trends.isibrno.cz/</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Treatment of surfaces with slow electrons
Original language description
Historically, the most annoying obstacle to acquiring SEM micrographs, in particular higher magnification micrographs taken with the ambition of resolving the finest observable details, may be said to be carbonaceous contamination “highlighting the previous field of view with a black rectangle contoured by an even darker frame. This contamination is generated by decomposition of adsorbed hydrocarbon molecules with incident electrons leaving a crosslinkednlayer of carbon atoms as a surface coating. The darker contours come from high surface mobility of hydrocarbon molecules from outside the field. The situation has been improved in recent decades by a lower pressure and dryer vacuum in specimen chambers, but even under ultrahigh vacuum (UHV) conditions the phenomenon occurs due to hydrocarbon molecules deposited on the specimen when loaded. Therefore, only in-situ cleaning with annattachment producing an ion beam solves this problem in UHV, while some plasma cleaners have also started appearing in standard-vacuum SEM chambers. The goal of complete removal of hydrocarbons is motivated by the supposed unavoidability of their decomposition with primary electrons. However, we have found hydrocarbon molecules being released, rather than their decomposition, when the energy of the impinging electrons drops beneath 50 eV or so.
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceedings of the 15th International Seminar on Recent Trends in Charged Particle Optics and Surface Physics Instrumentation
ISBN
978-80-87441-17-6
ISSN
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e-ISSN
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Number of pages
2
Pages from-to
10-11
Publisher name
Institute of Scientific Instruments CAS
Place of publication
Brno
Event location
Skalský dvůr
Event date
May 29, 2016
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000391254000003

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