Experimental physics

Seminars


Our regular group meetings are on alternate Tuesday at 10:00 AM in Building 28, conference room 2.066.

Sommersemester 2017


  • 18.07.2017   10:00
    Joachim Jelken

  • 11.07.2017   10:00
    Maren Rabe

  • 27.06.2017   10:00
    Pooja Arya

  • 13.06.2017   10:00
    Sarah Loebner

  • 30.05.2017   09:00
    Symposium «Deformations in photo-sensitive Materials»

  • 23.05.2017   10:00
    Selina Schimka

  • 16.05.2017   10:00
    David Feldmann

Wintersemester 2016-2017


  • 01.03.2017   10:00
    Iliya Gorbachev

  • 28.02.2017   14:00
    Evgenii Titov, Doktorarbeit Verteidigung

  • 07.02.2017   10:00
    Dr. Olga Guskova
    «Exploring molecular properties of azobenzene - containing systems using computer modeling»
    Abstract in pdf format

  • 17.01.2017   10:00
    Sarah Loebner

  • 10.01.2017   10:00
    Joachim Jelken

  • 06.12.2016   10:00
    Selina Schimka

  • 02.11.2016   14:00
    A. Seemann, Masterarbeit Verteidigung

  • 01.11.2016   10:00
    David Feldmann

  • 25.10.2016   10:00
    Ivan Malyar

Sommersemester 2015


  • 05.07.2016   10:00
    Guest

  • 21.06.2016   10:00
    Evgenii Titov

  • 14.06.2016   10:00
    Selina Schimka

  • 31.05.2016   10:00
    Sarah Loebner

  • 24.05.2016   10:00
    Joachim Jelken

  • 10.05.2016   10:00
    David Feldmann

  • 19.04.2016   10:00
    Arne Ronneberg (group of Prof. Dr. Matthias Ballauff)

Wintersemester 2015-2016


  • 02.02.2016   10:00
    Guest

  • 26.01.2016   10:00
    Evgenii Titov

  • 19.01.2016   10:00
    Sarah Loebner

  • 12.01.2016   10:00
    David Feldmann

  • 01.12.2015   10:00
    Dr. Heinz Preuß
    «Eigene Forschungsergebnisse und Gedanken zur Kettenfaltung in HD-PE»

  • 24.11.2015   10:00
    Ivan Malyar

  • 03.11.2015   10:00
    Selina Schimka

  • 28.10.2015   13:00
    Dr. Filipe Natalio, Martin-Luther University, Halle (link)

Sommersemester 2015


  • 07.07.2015   10:00
    Dr. Alexander Yakimansky
    «Molecular Polyimide Brushes with Polymethacrylate Side Chains: Controlled Synthesis and Possible Applications»

  • 28.05.2015   10:00
    Dr. Yuri Ryabchikov

  • 12.05.2015   10:00
    David Feldmann

  • 05.05.2015   10:00
    Bat El Pinchasik, Max Planck Institute of Colloids and Interfaces, Potsdam
    «Manipulation of microbubbles inspired by bubble use in nature»

  • 21.04.2015   10:00
    Mersa Saatchi, Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung
    «Multifunctional Multilayer System»

  • 07.04.2015   10:00
    Selina Schimka

  • 31.03.2015   10:00
    Julia Gordievskaya

Wintersemester 2014-2015


  • 27.01.2015   10:00
    Guest

  • 20.01.2015   10:00
    Evgenii Titov

  • 07.01.2015   10:00
    Prof. Olga Vinogradova, Moscow State University

  • 16.12.2014   10:00
    Guest

  • 09.12.2014   10:00
    Liudmila Lysyakova

  • 25.11.2014   10:00
    Dr. Andrei Varykhalov, Helmholtz Zentrum Berlin
    «Tunable spin-orbit effects in graphene»

    Results of recent experiments performed with spin- and angle-resolved photoemission which reveal different approaches allowing for control of Rashba-type electronic states in graphene will be presented and discussed.

    In the first part of the presentation it will be shown how the spin-orbit split surface state of Ir(111) can be tuned through the modulation of structural properties of a graphene overlayer grown on top of the iridium sample. A substantial binding energy shift of the Ir(111) surface state is achieved either through enhancement of the graphene corrugation by a superlattice of deposited clusters or through increasing the thickness of the graphene overlayer. The resulting effects are assigned to the alteration of the graphene-Ir separation. The magnitude of the surface state Rashba splitting, however, remains preserved in both cases.

    The second part of the talk is devoted to a specific Rashba effect in graphene, which can be induced extrinsically though the contact of graphene with high-Z materials. A giant (~100 meV) spin-orbit splitting of the Dirac cone in quasifreestanding graphene intercalated with Au will be demonstrated and analysed in terms of electronic hybridization between graphene and Au atoms. A similar effect will be revealed for graphene on Ir(111), although it will be shown that the magnitude of the Rashba splitting in this system is very sensitive to even small rotational displacements of the graphene with respect to the Ir substrate. Finally, a possibility to tune the magnitude of the Rashba splitting in the Dirac cone through co-intercalation of graphene on Ni(111) with different materials will be demonstrated.


  • 18.11.2014   10:00
    Selina Schimka

  • 11.11.2014   10:00
    David Feldmann

  • 04.11.2014   10:00
    Johann Nuck

Sommersemester 2014


02.09.2014   10:00
Robert Niedl
«Lab in a Hankie»

08.07.2014   10:00
Maren Rabe

01.07.2014   10:00
Guest

17.06.2014   10:00
Zhenja Titov

20.05.2014   10:00
Mila Lysyakova

13.05.2014   10:00
Selina Schimka

06.05.2014   10:00
David Feldmann

29.04.2014   10:00
Johann Nuck

15.04.2014   10:00
Group seminar

Wintersemester 2013


27.03.2014   10:00
Thomas Papke

18.02.2014   10:00
Thomas Papke

11.02.2014   14:00
Prof. Karsten Hinrichs, ISA

04.02.2014   10:00
Jenya Titov

28.01.2014   10:00
Guest

21.01.2014   10:00
David Feldmann

07.01.2014   10:00
Nataraja Sekhar Yadavalli

10.12.2013   10:00
Uwe Wolf

26.11.2013   10:00
Thomas Papke

19.11.2013   10:00
Jenya Titov

12.11.2013   10:00
Selina Schimka

05.11.2013   10:00
Judy Selix
«Licht-kontrollierte, reversible Änderungen der Topographie und Schichtdicke in lichtempfindlichen Polymer-Bürsten»

04.11.2013   14:00
Dr. Giuseppe Di Florio
«Graphene as nanosized optical strain gauge: A Raman investigation of a new composite graphene-polymer system»

29.10.2013   10:00
Mila Lysyakova
«Light controlled surface plasmon properties of gold nano-clusters»

15.10.2013   10:00
Ivan Malyar
«Photo-contolled adsorption of polyelectrolytes and nanoparticles onto silicon»

Sommersemester 2013


05.08.2013   11:00
Dr. Tobias Konig, Georgia Institute of Technology, Atlanta, USA.
«Novel plasmonic properties of controlled assembled nanostructures»

11.06.2013   10:00
Thomas Papke

Wintersemester 2012/2013


05.03.2012   10:00
Mila Lysyakova

26.02.2013   10:00
Thomas Neitzel

19.02.2013   10:00
Dr. Margarita Krutyeva, Forschungszentrum Julich GmbH

14 - 15.02.2013   10:00
Workshop NT-MDT «Light and matter at the nanoscale»


12.02.2013   10:00
Thomas Papke

15.01.2013   10:00
Anne Stötzer
«Properties of Langmuir monolayers of poly-(rac-lactide-co-glycolide)»

11.12.2012   13:00
Mila Lysyakova

06.12.2012   14:00
Dr. Marina Grenzer

27.11.2012   13:00
Thomas Papke

14.11.2012   10:00
Dr. Nikolai Severin
«Liquid molecules confined between graphene and mica»

30.10.2012   10:00
David Feldmann

16.10.2012   10:00
Felix Linde

25.09.2012   9:30
Prof. Elena Kramarenko and Artem Rumyantcev, Moscow State University
«Interaction of polyelectrolytes with surfactants: theoretical consideration»

18.09.2012   9:30
David Feldmann

11.09.2012   9:30
Jens Paasche

Sommersemester 2012


26.06.2012   9:30
Nataraja Sekhar Yadavalli

05.06.2012   9:30
Achim Quaas

29.05.2012   9:30
Felix Linde

22.05.2012   9:30
Svitlana Zakrevska

24.04.2012   9:30
Julian Roxlau

03.04.2012   10:00
Mila Lysyakova

27.03.2012   10:00
Dr. Olga Guskova, Leibniz Institute of Polymer Research Dresden
«Assembly of nanoparticles on diblock copolymer brushes: toward laterally nanostructured composites»

20.03.2012   10:00
Ivan Maljar

13.03.2012   10:00
David Feldmann

06.03.2012   10:00
Ronny Habermann

21.02.2012   10:00
Prof. Dr. Dmitry Gorin
«Nanocomposite coatings, core-shell structures, microcapsules: preparation and physical properties control»

14.02.2012   10:00
Franca Reuter

Wintersemester 2011/2012


06.12.2011   10:00
Franca

29.11.2011   10:00
Dr. Yuriy Zakrevskyy

22.11.2011   10:00
Ivan Malyar

15.11.2011   10:00
Felix Linde

01.11.2011   10:00
Tobias König

25.10.2011   10:00
Nataraja Sekhar Yadavalli

18.10.2011   10:00
David Feldmann

Sommersemester 2011


12.07.2011   9:00
Hardy Drube and Thomas Papke: «Current reports»

04.07.2011   9:00
Stephan Eickelmann and Julian Roxlau:

23.06.2011   16:15 ( Geb. 12, Raum 2.12.001 )
Prof. Vladimir Tsukruk: «Learning from Nature for better sensing»

07.06.2011   9:00
Marcel Richter: «Elasting of microgel particles determined by AFM technique»

31.05.2011   10:00
Dr. Jürgen Reiche: «Bruster Microscope»

24.05.2011   10:00
Felix Linde: «Current report»

01.02.2011   10:00
Michael Köpf: «Mechanism of pattern formation in Langmuir-Blodgett film»

23.11.2010   10:00
Heiko Harder: «Current report»

26.10.2010   10:00
Dr. Yuriy Zakrevskyy: «DNA condensation by azobenzene containing surfactant»

19.10.2010   10:00
Dr. Jürgen Reiche: «Investigation of organic structures by X-ray diffraction - a puzzle of methods / examples»

31.08.2010   10:00
Nataraja Sekhar: «Tailor made nano-antennas for surface plasmon induced topography changes in soft thin films»

02.07.2010   09:00
Elena Morozova: «DNA conformation»

19.05.2010   10:00
Tobias König: «Reversible structuring of azobenzene polymer films by surface plasmons»

It should be possible to move adsorbed nano-objects with relative ease, in large number and simultaneously. The essential idea is not to put more effort in fighting against the prevailing surface forces but rather to utilize them - in clear contrast to current techniques of nano-manipulation with atomic force microscopy [Santer, Adv Mat 2006]. For this, the topography should be reversible switching between different states by changing the morphology at the scale of objects to be moved. In this work, we choose light for changing the polymer topography. Here we present azo thin films [Seki, Chem Soc Jpn 2007] with integrated optically active elements supposed to support and steer the response of polymer films to external illumination by acting as nano-scale antennas. During irradiation surface plasmon (SP) waves are generated on a metallic mask. The interaction of the SP waves with azo polymers results in printing of near field intensity distributions into topography with the pattern size below the diffraction limit. We found that the topography can be driven reversible by changing polarization or wavelength. We also examine how the structuring process depends on the size of the metallic patterns. The results are confirmed by FTDT simulations and compared with imprints of photolithographic mask.