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IRTG / Soft Matter Science
Freiburger Materialforschungszentrum
Stefan-Meier-Str. 21
79104 Freiburg, Germany

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You are here: Home Events Prof. Markus Retsch "Colloidal Assembly Structures and their Role in Energy Conversion and Conservation"

Prof. Markus Retsch "Colloidal Assembly Structures and their Role in Energy Conversion and Conservation"

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Lichtenberg-Juniorprofessur for Polymer Systems, Physical Chemistry 1, University of Bayreuth, Germany

  • Seminar
When May 13, 2015
from 02:15 PM to 03:00 PM
Where Seminarraum A, FMF, Stefan-Meier-Str. 21, Freiburg
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In the light of the increasing demands on efficiently using our limited energy resources, new concepts need to be developed. These can be either directed towards the generation of usable energy, for instance by conversion of solar power or waste heat into electricity. Alternatively, we need to reduce our energy consumption for instance by more efficient thermal insulation. Colloidal assembly structures represent an important material platform to reach these goals. The strength of colloidal superstructures lies in the simple and scalable access to well-defined nanostructures, which can be implemented into novel devices for energy conversion or efficiency.

In my presentation I will demonstrate how two-dimensional colloidal monolayers can be used to potentially improve the efficiency of thin film solar cells. In particular I will report on their antireflective properties. Furthermore, such monolayers can be used for colloidal templating, which allows fabricating metallic nanomeshes, which could be used as a replacement for ITO.

In a second part, I will focus on energy conservation. For this I will introduce the thermal transport properties of three-dimensional colloidal crystals. These colloidal crystals are either based on poly(styrene) or hollow silica nanoparticles. The thermal conductivity of these materials greatly depends on the mutual interfaces, as well as on the internal microstructure. I will demonstrate how the thermal transport can be fine-tuned and how it depends on the colloidal building blocks, the temperature, or the atmosphere.

invited by Dr. Michael Sommer

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