Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 14: Organic-inorganic hybrid systems and organic films II
O 14.7: Vortrag
Montag, 12. März 2018, 17:00–17:15, MA 042
Monitoring ligand induced assembly of PbS nanocrystals on the liquid surface by in-situ grazing incidence X-ray scattering — •Santanu Maiti1, Sonam Maiti1,2, Jan Hagenlocher1, Andre Maier2, Andrei Chumakov3, Marcus Scheele2, and Frank Schreiber1 — 1Institute of Applied Physics, University of Tuebingen, Auf der Morgenstelle 10, 72076 Tuebingen, Germany — 2Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany — 3ID10, European Synchrotron Radiation Facility (ESRF), 38000 Grenoble, France
Hybrid nanostructures, composed of inorganic nanocrystals (NCs) and organic semiconductor (OSC) molecules exhibit efficient charge transport and optoelectronic properties[1,2]. The OSC ligand (CuTAPc) induced structural evolution and growth kinetics of PbS NC superlattices at the acetonitrile/air interface has been monitored by in-situ grazing incidence small angle X-ray scattering and grazing incidence X-ray diffraction in real time[3-4]. A continuous in-plane contraction of the superlattice monolayer with time and an overall shrinkage of 5% in lattice constant after complete exchange has been observed. In addition, the atomic orientation of the NCs has been figured out during the exchange process. The combined results provide a complete understanding of atomic and nano-scale assembly of NCs during ligand exchange. 1. M. P. Boneschanscher et al., Science 344, 1377 (2014); 2. M. Scheele et al., PCCP 17, 97 (2015); 3. S. Maiti et al., JPCM, 29, 095101 (2017); 4. A. Andre et al., Chem. Mater. 27, 8105 (2015).