Bacteria detection in a Kretschmann geometry flow cell at a plasmon-enhanced interface with spectroscopic ellipsometer

verfasst von

Soraya Zangenehzadeh, Emil Agócs, Harsh Jivani, Lea Könemund, Laurie Neumann, Felix Hirschberg, Svenja Herdan, Rebekka Biedendieck, Dieter Jahn, Bernhard W. Roth, Hans Hermann Johannes, Wolfgang Kowalsky

Abstract

In this work, we investigate whether bacteria can be substantially examined in liquid environment with an ellipsometer in the visible wavelength range. For that investigation a Kretschmann type flow cell was used in which the paths of illuminated and reflected light beams are on the substrate side. To enhance the sensitivity a thin gold layer was applied on the top of glass substrate and the measurement was performed by using surface plasmon polaritons. Porphyrin functionalized coating layers were employed to analyze their performance to capture bacteria and to study the stability and repeatability of the optical response with regard to the ellipsometric measurement. Escherichia coli (E. coli) bacteria were used as first model bacteria and their deposition on the sensing surface was monitored in a real-time measurement in a liquid environment.

Organisationseinheit(en)

PhoenixD: Simulation, Fabrikation und Anwendung optischer Systeme
Hannoversches Zentrum für Optische Technologien (HOT)

Externe Organisation(en)

Technische Universität Braunschweig

Typ

Artikel

Journal

THIN SOLID FILMS

Band

764

ISSN

0040-6090

Publikationsdatum

01.01.2023

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektronische, optische und magnetische Materialien, Oberflächen und Grenzflächen, Oberflächen, Beschichtungen und Folien, Metalle und Legierungen, Werkstoffchemie

Elektronische Version(en)

https://doi.org/10.1016/j.tsf.2022.139583 (Zugang: Geschlossen)