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Lichtenbergstr.1
85748 Garching

Tailoring functionality in materials

Material science has developed tremendously in the last decades and a fundamental understanding is emerging enabling tailor designed materials with very specific functionality. Still exactly predicting macroscopic functionality from the composition, structure and dynamics at the atomic level remains challenging and engineering science, or pharmacy, often rely on screening approaches. The reason for this is the large range of length and time scales that need to be addressed. At one end computer simulations and synthesis is concerned with atomic length and time scales, while mean field approaches and our daily experience cover the macroscopic emergence of functionality.

In this talk I will summarise some recent results on the connection between microscopic characteristics and functionality in materials, focusing on three areas:

Magnetic liquids: Similar to Archimedes principle for floating objects in water, a non- magnetic micro beat can behave effectively magnetic when introduced in a ferrofluid. Following this approach material properties, like e.g. viscosity or electron transport, can be tuned by magnetism and be optimised independently. We have done microscopy studies on the phase behaviour of such systems and connect them to their electrical performance. These studies will be complemented by particle design for self controlling hyperthermia and the adsorption at model surfaces possibly allowing targeted drug delivery.

Light impurities: Metal hydrides or oxihydrides potentially have a wide range of applications in the energy sector, e.g. as proton conductors in fuel cells, stationary energy storage and smart windows. I will show how the kinetic and thermodynamic properties of transition metal hydrides can be tuned, via tailor designing finite size, proximity and strain in single crystalline thin films. As a second example the photochromic properties of Yttriumoxihydride and their connection to the composition and structure of the material will be discussed.

Polymers: Complex liquids have unique flow properties, which are related to changes in their local structure as well as to the spectrum of relaxation times. This gives large flexibility in the design of their mechanical properties and nowadays polymers are found almost everywhere in our daily live. In this talk I will shed light on the connection between the flow properties of block polymers, simple liquids as well as polymer melts and their structure and dynamics on the microscopic scale, with specific emphasis on flow instabilities and the role of the solid boundary. The research aims at a comprehensive understanding of viscoelasticity.

Neutron scattering methods provide a valuable, direct and quantitative approach to extract key information for all the above areas. I will highlight the complementary results and address some challenges and opportunities connected to the method.

Seminar: Neutronen in Forschung und Industrie

Datum29.04.2019
Uhrzeit14:30 - 15:30 Uhr
OrtGarching
RaumHS 3 (Physik Department)
Sprecher Maximilian Wolff, Uppsala University
Veranstalter

TUM / FRM II


Kontakt

Ansprechpartner

Dr. Markos Skoulatos und Dr. Alexandros Koutsioumpas

E-Mail

Markos.Skoulatos@frm2.tum.de

URL

https://indico.frm2.tum.de/event/172/

MLZ ist eine Kooperation aus:

Technische Universität München> Technische Universität MünchenHelmholtz-Zentrum Hereon> Helmholtz-Zentrum Hereon
Forschungszentrum Jülich> Forschungszentrum Jülich

MLZ ist Mitglied in:

LENS> LENSERF-AISBL> ERF-AISBL

MLZ in den sozialen Medien: