BEGIN:VCALENDAR
VERSION:2.0
PRODID:https://www.uni-due.de
METHOD:PUBLISH
BEGIN:VTIMEZONE
TZID:Europe/Berlin
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:19700329T020000
RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=3
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:19701025T030000
RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=10
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
UID:ude20150310100000
CLASS:PUBLIC
SUMMARY:Gastvortrag über Graphen
DTSTART;TZID=Europe/Berlin:20150310T100000
DTEND;TZID=Europe/Berlin:20150310T000000
DTSTAMP:20150310T100000Z
LOCATION;ENCODING=QUOTED-PRINTABLE:Campus Campus Duisburg : MG 272
CONTACT:Herr PD Dr.  Frank Meyer zu Heringdorf (Fakultät für Physik / Experimentalphysik)
DESCRIPTION:Herr PD Dr.  Frank Meyer zu Heringdorf (Fakultät für Physik / Experimentalphysik)
Gastvortrag über Graphen
"The Formation Mechanism and Properties of Intercalated Graphene on Ir(111)"
Vortrag von Dr. Marin Petrovic, Institute of Physics, University of Zagreb/Croatia: "The Formation Mechanism and Properties of Intercalated Graphene on Ir(111)".

Abstract:
Epitaxial graphene on iridium (111) surface is considered to be one of the best systems for studying fundamental properties of graphene due to its uniform alignment and weak binding to the substrate. In such systems, graphene properties can be additionally modified by intercalation of various atoms (or molecules) in between the graphene and the substrate. Therefore, a detailed understanding of the formation and properties of these hybrid structures is necessary.
By deposition of different amounts of various atoms (Cs, Li, O and Eu) on monolayer and sub-monolayer graphene/Ir(111) samples, hybrid systems exhibiting novel properties are formed. Low-energy electron microscopy and scanning tunneling microscopy are used for morphological characterization of the samples while the electronic structure is investigated by means of angle-resolved photoemission spectroscopy. The presented results explain the intercalation mechanism of epitaxial graphene and show how the intercalation affects the adsorption properties onto graphene. Important role in the process of intercalation is assigned to graphene wrinkles which facilitate the penetration of atoms through the graphene layer. Besides on graphene properties, intercalation also has an impact on the substrate, more specifically on the binding energy and coherence of the surface states of Ir.


Tuesday, 10. March 2015
END:VEVENT
END:VCALENDAR