TY - CHAP A1 - Ermilova, Elena A1 - Hertwig, Andreas A1 - Döhring, Thorsten A1 - Stanik, Eva A1 - Cotroneo, Vincenzo A1 - Gibertini, Eugenio T1 - Ellipsometrische Charakterisierung von Polydopamin für funktionelle technische Schichten T2 - DGaO-Proceedings N2 - Dünne Schichten aus dem bionischen Material Polydopamin (PDA) sind heute zunehmend auch für innovative technische Anwendungen von Interesse. Mittels spektroskopischer Ellipsometrie wurde die dielektrische Funktion von PDA vom ultravioletten bis zum nahen infraroten Spektralbereich vermessen. Über ein Modell wurde auch die Dicke dieser selbstorganisierenden Schichten bestimmt. KW - Polydopamin KW - PDA KW - Ellipsometrie KW - Röntgenspiegeln KW - Astronomie KW - Dünne Schicht KW - Röntgenastronomie Y1 - 2024 UR - https://www.dgao-proceedings.de/download/125/125_b6.pdf VL - 2024 IS - 125 SP - 1 EP - 2 ER - TY - CHAP A1 - Ermilova, Elena A1 - Hertwig, Andreas A1 - Döhring, Thorsten A1 - Stanik, Eva A1 - Cotroneo, Vincenzo A1 - Gibertini, Eugenio T1 - Ellipsometrical characterization of poly-dopamine layers considered for technical applications T2 - Proceedings of SPIE N2 - 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. KW - dopamine KW - ellipsometry KW - refractive index KW - thin films KW - X-ray mirror KW - Dünne Schicht KW - Dopamin KW - Ellipsometrie Y1 - 2024 UR - https://doi.org/10.1117/12.3015281 U6 - https://doi.org/https://doi.org/10.1117/12.3015281 VL - 2024 IS - 13013 SP - 1301309-1 EP - 1301309-8 ER -