Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 37: Nanostructures at Surfaces III
O 37.2: Vortrag
Dienstag, 8. März 2016, 14:30–14:45, S054
Bromine-functionalized pyrene derivatives on metal surfaces: self-assembly and on-surface polymerization — •Bay V. Tran1, Tuan Anh Pham1, Fei Song1, Manh Thuong Nguyen2, Milan Kivala3, Lutz H. Gade4, and Meike Stöhr1 — 1Zernike Institute for Advanced Materials, University of Groningen, the Netherlands — 2The Abdus Salam International Center for Theoretical Physics, Italy — 3Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Germany — 4Anorganisch-Chemisches Institut, University of Heidelberg, Germany
On-surface polymerization under ultrahigh vacuum conditions, an alternative method compared to solution-based synthesis, is considered as a promising route in the bottom-up approach for constructing novel 1D and 2D materials. One of the intriguing materials which can be reliably obtained through on-surface polymerization based on Ullmann coupling is graphene nanoribbons. On the other hand, the controlled construction of sufficiently large 2D polymer networks still represents a challenge.
In this work, we report on both the self-assembly as well as the on-surface polymerization of bromine-functionalized pyrene derivatives on Au and Cu surfaces. The experiments (combining scanning tunneling microscopy (STM), low energy electron diffraction (LEED) and X-ray photoelectron spectroscopy (XPS) measurements) were performed under UHV conditions. Insight was obtained with respect to the structural and electronic properties of the as-deposited molecular monomers as well as the polymer networks generated through thermal annealing.