Participation of the representatives of both Partners in the 8th International Workshop on More information
Sep 9, 2016
The annual review meeting, 2015
Nanoscale Pattern Formation at Surfaces, July 12-16, 2015 Krakow, Poland. Oral and poster
presentations showing the results obtained during Project realization and the present state of the art in the research field.
The Workshop is held in the Auditorium Maximum of the Jagiellonian University, Krupnicza 33,
Kraków, Poland.
Abstract
Transformations of molecular structures formed by perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) molecules on a rutile TiO2 (110) surface are studied with low-temperature scanning tunnelling microscopy. We demonstrate that metastable molecular assemblies transform into differently ordered structures either due to additional energy provided by thermal annealing or when the influence of intermolecular forces is increased by the enlarged amount of deposited molecules. Proper adjustment of molecular coverage and substrate temperature during deposition allows for fabrication of desired assemblies. Differences between PTCDA/TiO2 (110) and PTCDA/TiO2 (011) systems obtained through identical experimental procedures are discussed.
Abstract
We analyze self-assembled nanocrystals of 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA) molecules on hydrogen passivated Ge(001) surfaces with use of scanning tunneling microscopy (STM) and spectroscopy (STS). At 0.7ML coverage, 2.1 nm high, elongated, hexagonal islands inclined at 37° with respect to the substrate row are mostly observed. By measuring the differential tunneling conductance, we observe an effect of electronic decoupling of the nanocrystals due to the introduced passivating layer. Finally, we shortly discuss the stability of the islands and their interaction with the scanning probe in the ultra-high vacuum environment.
Read more Like at the previous meetings (STM/AFM 2000, 2002... 2012) the main goal of the Workshop is to gather scientists who are, or who would like to be involved in surface research with use of the experimental techniques known under a common name of Scanning Probe Microscopy (SPM), such as: Scanning Tunneling Microscopy (STM), Atomic Force Microscopy (AFM), and other related techniques operating either under ultra high vacuum environment, or in liquid/gas atmosphere. We wish the Workshop to be an interdisciplinary meeting for participants representing different theoretical and experimental disciplines of scientific research. Conference website