Fyzikální ústav Akademie věd ČR

Semináře

Út, 06/06/2017 - 10:00 - 11:00

Silvia Karthäuser (Peter Grünberg Institut (PGI-7) and JARA-FIT, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany)

Close-packed monolayers of Buckminsterfullerenes (C60) on metallic substrates are very rich systems with respect to their rotational degrees of freedom and possible interactions with different adsorption sites or next neighbors. They have attracted much attention due to their structural and electronic properties.

Út, 06/06/2017 - 13:00 - 13:30

Benoît Mahler (Chargé de recherche CNRS, ILM Université Claude Bernard Lyon1, France )

Since the rise of graphene almost 15 years ago, the development and study of new two-dimensional materials has become an extremely active research field. Instead of relying on exfoliation or substrate growth procedures, we choose to develop colloidal strategies to synthesize 2D nanomaterials. This exploration led to the development of a broad range of colloidal 2D nanostructures, either based on cadmium chalcogenides or tungsten disulfide, and to the use of specific spectroscopic techniques to study these nanosheets.

Út, 06/06/2017 - 13:30 - 14:00

Dr. Estelle Homeyer (ILM-⁠UCBL, Lyon, France)

Luminescence is a process of light emission which sometimes strongly depends on external factors such as pressure, temperature, index of refraction… We use this property in the frame of contactless thermometry in various applications such as analysis of local thermal and mechanical properties of materials. I will present the various techniques which can be used and their limitations, and then focused on sensors based on microdiamonds.

St, 07/06/2017 - 10:00 - 11:00

Paul S. Weiss (Distinguished Professor of Chemistry & Biochemistry and of Materials Science & Engineering, UCLA)

We use molecular design, tailored syntheses, intermolecular interactions, and selective chemistry to explore the ultimate limits of miniaturization. We direct molecules into desired positions to create nanostructures, to connect functional molecules to the outside world, and to serve as test structures for measuring single or bundled molecules. Interactions within and between molecules can be designed, directed, measured, understood, and exploited at unprecedented scales.

Út, 13/06/2017 - 10:00 - 11:00

Karina Morgenstern (Chair of Physical Chemistry I; Ruhr-Universität Bochum, Germany)

While photochemistry in the gas phase demands a resonant excitation of the molecules, the presence of a metal surface in surface chemistry opens a different pathway via the creation of hot electrons in the metal and subsequent attachment of these energetic electrons to adsorbed molecules. We use two set-ups that combine a low-temperature scanning tunneling microscope operating below 10 K with a frequency doubled femto-second laser and a tunable pico-second laser, respectively, to investigate processes induced by these electrons on a single molecule basis.

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