Free Newsletter
Register for our Free Newsletters
Newsletter
Zones
Advanced Composites
LeftNav
Aerospace
LeftNav
Amorphous Metal Structures
LeftNav
Analysis and Simulation
LeftNav
Asbestos and Substitutes
LeftNav
Associations, Research Organisations and Universities
LeftNav
Automation Equipment
LeftNav
Automotive
LeftNav
Biomaterials
LeftNav
Building Materials
LeftNav
Bulk Handling and Storage
LeftNav
CFCs and Substitutes
LeftNav
Company
LeftNav
Components
LeftNav
Consultancy
LeftNav
View All
Other Carouselweb publications
Carousel Web
Defense File
New Materials
Pro Health Zone
Pro Manufacturing Zone
Pro Security Zone
Web Lec
Pro Engineering Zone
 
 
 
News

Slow Electrons are killing Ozone, Outstanding new discoveries in ion physics

Austrian Science Fund (FWF) : 15 October, 2001  (Technical Article)
Tilmann M
And their research has been successful, they have made a number of discoveries, including a new ozone destruction process, and they have clearly established the binding energy of the 'buckyball', C60 , which has long since been the subject of international research.

The destruction of the ozone in the earth's atmosphere has many different causes, many of which are unknown. Tilmann Märk and his team, in cooperation with University College London, have identified a phenomenon which was hitherto considered impossible, but which basically constitutes another ozone destruction process.

'We have proved what was previously considered impossible: slow, thermal electrons are taken up by the ozone. This happens with great frequency and has a detrimental effect on the atmosphere, since this destroys the ozone,' explains Märk.

Since there are a great number of these slow electrons in the ionosphere, it is clear that the many ozone models must be recalculated in light of these results and the simulations must be re-worked.

The binding energy of the 'buckyball'
A further highlight amongst Märk's results relates to the well-known football-shaped 'buckyball' C60, which is characterised by its particular stability. In cooperation with the University of Jerusalem, Märk has revealed the secret of this binding energy. 'Unusually for a 'football', we bombarded the C60 molecule with electrons, thereby attempting to break a C2 molecule away from the ionised molecule cluster. We wanted to know the energy required for this fragmentation process, since, conversely, this also tells us the energy with which this part is bound to the rest of the molecule,' explains Märk. Märk and his team succeeded in breaking a C2 carbon molecule away from the C60 ion and therefore established the measure of stability, i.e. the precise binding energy. The astonishing result: the binding energy required to break away a C2 molecule, at 10 electron volts, is considerably higher than the ionisation energy of approximately 7.6 eV, this makes C60 very different from other molecules.
Bookmark and Share
 
Home I Editor's Blog I News by Zone I News by Date I News by Category I Special Reports I Directory I Events I Advertise I Submit Your News I About Us I Guides
 
   Â© 2012 NewMaterials.com
Netgains Logo