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AG Prof. Dr. Schirmeisen

Research Group Prof. Dr. André Schirmeisen
AG Prof. Dr. Schirmeisen - Neu

The main part of our research is focused on the development and application of scanning probe microscopy methods to nanoscale material analysis. Investigated material classes include organic molecules on surface for 2D chemistry, tribologically active surfaces and energy storage interfaces. On-site method development encompasses dedicated probe engineering, molecular manipulation strategies, field ion microscopy, tip-enhanced Raman scattering set-up (TERS) and liquid cell AFM. Enabling technology activities include development of novel pulse tube cryocoolers, and their adaptation to sub 4K cooling of scientific instruments.

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Address

 

Research Group Prof. Dr. André Schirmeisen

Institute of Applied Physics

Justus-Liebig University Gießen

Heinrich-Buff-Ring 16

35392 Gießen, Germany

 

 

News

 

  • 9/2017: Cooperation with Prof. Schreiner group (JLU) and Stanford university shows importance of Londons Dispersion forces for the self-assembly of Nanodiamonds in a new publication in ACS Nano. London dispersion (LD) acts between all atoms and molecules in nature, but the role of LD interactions in the self-assembly of molecular layers is still poorly understood. In this study, direct visualization of single molecules using atomic force microscopy with CO-functionalized tips revealed the exact adsorption structures of bulky and highly polarizable [121]tetramantane molecules on Au(111) and Cu(111) surfaces. Link to article.

    Abstract Image
    D. Ebeling, M. Sekutor, M. Stiefermann, J. Tschakert, J.E.P. Dahl, R.M.K. Carlson, A. Schirmeisen, P.R. Schreiner, "London Dispersion directs On-Surface Self-Assembly of [121] Tetramantane Molecules", ACS Nano (2017)

  • 7/2015: What are the limits of superlubricity? Our recent publications in cooperation with Prof. Stich (Slovak academy of sciences) pinpoints the limits of zero friction sliding due to size thresholds. Structural superlubricity describes the state of virtually frictionless sliding if two atomically flat interfaces are incommensurate, that is, they share no common periodicity. Despite the exciting prospects of this low friction phenomenon, there are physical limitations to the existence of this state. Theory predicts that the contact size is one fundamental limit, where the critical size threshold mainly depends on the interplay between lateral contact compliance and interface interaction energies. Here we provide experimental evidence for this size threshold by measuring the sliding friction force of differently sized antimony particles on MoS2. Link to article.

    Abstract Image 
    D. Dietzel, J. Brndiar, I. Stich, A. Schirmeisen, "Limitations of structural superlubricity: Chemical bonds versus contact size", ACS Nano 11 (2017) 7642

  • 3/2017: Chemistry textbook reaction Ullman-coupling observed step-by-step at chemical bond level. Cooperation with Prof. Wegner (JLU) and Prof. Mollenhauer (JLU) sheds light on 'intermediate-state' during coupling reaction of Bromo-Triphenylene on Cu surfaces. Link to article.
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    S. Zint, D. Ebeling, T. Schlöder, S. Ahles, D. Mollenhauer, H. Wegner, A. Schirmeisen, "Imaging Successive Intermediate States of the On-Surface Ullmann Reaction on Cu(111): Role of the Metal Coordination", ACS Nano 11 (2017) 4183

  • 7/2016: Contact ageing of nanoparticles - New publication in PRL highlights the mechanism of ageing for individual nanoparticles by analysis of their stick-slip behaviour during sliding in this cooperation with Prof. Grütters group (McGill University, Canada). The term “contact aging” refers to the temporal evolution of the interface between a slider and a substrate usually resulting in increasing friction with time. Current phenomenological models for multiasperity contacts anticipate that such aging is not only the driving force behind the transition from static to sliding friction, but at the same time influences the general dynamics of the sliding friction process. To correlate static and sliding friction on the nanoscale, we show experimental evidence of stick-slip friction for nanoparticles sliding on graphite over a wide dynamic range. Link to article.
    Figure 1
    M. Feldmann, D. Dietzel, A. Tikiel, J. Topple, P. Grütter, and A. Schirmeisen, "Universal Ageing Mechanism for Static and Sliding Friction of Metallic Nanoparticles", Physical Review Letters 117 (2016) 025502 

  • 11/2015: Announcement: The 611th Heraeus seminar with the topic "Mechanisms of Tribology" organized by Prof. André Schirmeisen, together with Prof. Bennewitz (Saarbrücken) and Dr. Dienwiebel (Karlsruhe) will take place from 29.3. - 1.4.2016 in Ban Honnef, Germany. We encourage especially young scientists and PhD-students to participate and submit a poster. The seminar will be completely funded and locally organized by the 'Wilhelm and Else Heraeus Foundation'. For accepted participants free board and lodging will be supplied by the 'WE Heraeus-Foundation'. More information on www.tribomechanisms2016.de

  • 9/2015: The "6th European Nanomanipulation Workshop" was successfully held from 23.-25 September 2015 at the JLU Giessen.Nanomanipulation2015                                              More information at www.nanomanipulation.eu

  • 12/2014: Exakt wie groß ist der Spitzenradius von metallischen Sonden, wie sie in der Rasterkaftmikroskopie eingesetzt werden? Eine neue Methodik erlaubt die direkte Korrelation von atomaren Strukturen, wie sie im Feldionenmikroskop gemessen werden, mit dem Spitzenradius: S. Zint, D. Ebeling, D. Dietzel, J. Falter and A. Schirmeisen, "Tip radius quantication using feature size mapping of field ion microscopy images", Physical Review B 90, 241413(R) (2014) (abstract)  FIMPRB2014

  • 10/2014: Die Reibung von Nanopartikeln und Superlubrizität: Ein aktueller Review als Open Access Artikel in dem neuen Springer Jounral Friction: D. Dietzel, U. D. Schwarz, and A. Schirmeisen, "Nanotribological studies using nanoparticle manipulation: Principles and application to structural lubricity", Friction 2 (2014) 114-139 (abstract)

  • 04/2014: Kontaktalterung von Nanopartikeln bestimmt die Reibungsdynamik. Mikroskopische Prozesse führen dazu, dass der Kontakt von metallischen Nanoteilchen auf Graphit sich mit der Zeit verfestigt. Dies führt zu einer komplexen Temperatur und Geschwindigkeitsabhängigkeit der Reibung, wie eine neue Publikation im Physical Review Letters zeigt (Feldmann, Dietzel, Fuchs, Schirmeisen, Phys. Rev. Lett. 112 (2014) 155503 (abstract)).