Some examples of environmental experiments under gas and temperature conditions in the Ly-EtTEM microscope

updated June 06 2015



  CONTROL of the REDUCTION STATE of CERIA (CeO₂)
Left: the same Ceria NP particle is successively observed at RT under 1 mbar of oxygen (left) and high vacuum (right): note the high surfaxce mobilty of the 'top' (001) surface in the second case. Right: EELS spectra of the O-K edge recorded under the same two conditions; no change occurs under oxygen whereas reduction of Ce⁴⁺ into Ce³⁺ is revealed by the decrease of the first peak of the O-K edge under HV. Short 'looped' sequences, low res. (c) T. EPICIER, M. AOUINE, F.J. CADETE SANTOS AIRES, C. DANIEL, IRCELYON, (2014).
Note: the video sequences should run at a 10 frames-per-seconds speed in nominal conditions (fluent internet traffic)