INVESTIGADORES
RAFTI Matias
congresos y reuniones científicas
Título:
Front dynamics in the O2 + NH3 reaction on Rh(110) surfaces investigated with LEEM
Autor/es:
BENJAMIN BORKENHAGEN, MATHÍAS RAFTI, GERHARD LILIENKAMP, WINFRIED DAUM, AND RONALD IMBIHL
Lugar:
berlin
Reunión:
Congreso; Reunion de Primavera de la Asociacion Alemana de Fisica (DPG); 2012
Institución organizadora:
Asociacion Alemana de Fisica (DPG)
Resumen:
Recent research on the O2 + NH3 reactions on Rh(110) focused on interface instabilities in this bistable reaction system. Since the surface structures and changes in the surface anisotropy presumably play a central role in the mechanism of the front instabilities we studied this reaction system in the 10−6 and 10−5 mbar range with LEEM (low energy electron microscopy) and µLEED. We identified the mixed coadsorbate phase c(2×4)-O,N and the c(2×6)-O phase in the bistable range. At higher temperatures we discovered the formation of µm-sized islands and studied phase transitions on these islands in detail. The phase transition front breaks up into separate fronts on each island. The small fronts are mainly influenced by the microscopic surface structure such as surface steps.
