7 - 11 April 2024
Strasbourg, France
Conference 13013 > Paper 13013-44
Paper 13013-44

Ellipsometrical characterization of poly-dopamine layers considered for technical applications

On demand | Presented live 10 April 2024

Abstract

Although the organic molecule dopamine (3,4-dihydroxyphenethylamine) is commonly known as the “hormone of happiness”, thin films of poly-dopamine also have interesting technical properties. When produced by dip coating, the self-organizing layers grow in a reproducible thickness of single or multiple molecule monolayers of a few nanometer thickness only. In this work, we introduce a method of determining the layer thickness of poly-dopamine on mirrors for astronomical X-ray telescopes. This work is based on spectroscopic ellipsometry measurements and involves the development of an optical model for the poly-dopamine layers including the dielectric function. Thereby the complex refractive index of the produced layers was determined, covering the range from the ultraviolet to the near infrared spectral region. These measurement results and the corresponding technical challenges are presented in this contribution. Furthermore, an outlook to potential technical applications of this interesting material is given and poly-dopamine layers will make scientist and engineers hopefully happy as an innovative and fascinating technical solution for the future.

Presenter

Thorsten Döhring
Technische Hochschule Aschaffenburg (Germany)
Thorsten Döhring studied physics at the University of Bielefeld, where he also got his Ph.D. After a PostDoc position at the Max-Planck-Institute for extraterrestrial Physics he started an industrial career. As an application engineer at SCHOTT AG he delivered ZERODUR glass ceramics for astronomical applications. Later he worked at Jena-Optronik GmbH as sales manager for satellite components. Since 2012 Dr. Thorsten Döhring is Professor at TH Aschaffenburg – a German University of Applied Sciences. His fields of research are optics, astronomy, and instrumentation for satellites.
Application tracks: Sustainability
Author
Bundesanstalt für Materialforschung und -prüfung (Germany)
Author
Bundesanstalt für Materialforschung und -prüfung (Germany)
Presenter/Author
Thorsten Döhring
Technische Hochschule Aschaffenburg (Germany)
Author
Eva Stanik
Technische Hochschule Aschaffenburg (Germany)
Author
INAF - Osservatorio Astronomico di Brera (Italy)
Author
Politecnico di Milano (Italy)