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SUMMARY:High-pressure synthesis of new materials via formation of new bond
 ing patterns and unusual stoichiometries
DTSTART:20130503T141500
DTSTAMP:20260427T201430Z
UID:dac329b5e8ae4f1d474737ba8b3ea792f4257f44211acb5bb574ff42
CATEGORIES:Conferences - Seminars
DESCRIPTION:A. Goncharov\, Geophysical Laboratory\, Carnegie Institution o
 f Washington\nThe search for new materials synthesized under extreme condi
 tions of high pressure and high pressure is currently actively pursued. Th
 ere are multiple theoretical predictions for superior material properties\
 , such as ultra-hardness\, superior transport properties such as electrica
 l and thermal conductivity\, high energy-density\, high-temperature superc
 onductivity\, ability to storage hydrogen\, etc. Synthesis of new material
 s at high pressures is based on changes in the equilibrium chemical bondin
 g. Moreover\, materials with “unusual” stoichiometries have been predi
 cted to become thermodynamically stable at high pressures. Implications of
  this novel extreme chemistry for synthesis of new materials for practical
  applications remain challenging because high-pressure bonding patterns ar
 e often thermodynamically unstable at ambient pressure. Search for a recov
 ery mechanisms or attempts of synthesis in nominally metastable conditions
  require detailed knowledge of the energy landscape\; extensive collaborat
 ive efforts of experiment and theory are needed for its determination. Her
 e\, I emphasize the importance for this task of in situ fast diagnostic me
 thods. I will present new results on synthesis of materials with new bondi
 ng patterns and unusual stoichiometries containing hydrogen\, nitrogen\, c
 arbon\, and halogens.
LOCATION:PH L1 503 http://plan.epfl.ch/?room=PHL1503
STATUS:CONFIRMED
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