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  4. Modification of silicon nitride with oligo(ethylene glycol)-terminated organophosphonate monolayers
 
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2020
Journal Article
Title

Modification of silicon nitride with oligo(ethylene glycol)-terminated organophosphonate monolayers

Abstract
Due to its unique properties, silicon nitride has found a wide variety of applications in nanodevice fabrication and biosensing. Self-assembled monolayers of phosphonic acids (SAMPs) can be applied to prepare well-defined organic interfaces suitable to anchor bioreceptor probes with a high surface density on different substrates. In this work, we report on the fabrication of SAMPs functional interfaces on silicon nitride. By using several surface analysis techniques, including contact angle (CA) measurements, atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS), we present a detailed characterization of the morphology, composition, and stability of the functional interface. In addition, we investigate the protective properties of organophosphonate functional interfaces containing only a few ethylene glycol (EG) units per SAMPs building block against non-specific surface binding of charged biomolecules by means of fluorescence spectroscopy.
Author(s)
Bartl, Johannes D.
Walter Schottky Institut / WACKER-Chair, Technische Universität München
Gremmo, Stefano
Walter Schottky Institut, Technische Universität München
Stutzmann, Martin
Walter Schottky Institut, Technische Universität München
Tornow, Marc  
Fraunhofer-Einrichtung für Mikrosysteme und Festkörper-Technologien EMFT  
Cattani-Scholz, Anna
Walter Schottky Institut, Technische Universität München / CeNS, Ludwig-Maximilians-Universität München
Journal
Surface Science  
Funder
Deutsche Forschungsgemeinschaft DFG  
Deutsche Forschungsgemeinschaft DFG  
DOI
10.1016/j.susc.2020.121599
Language
English
Fraunhofer-Einrichtung für Mikrosysteme und Festkörper-Technologien EMFT  
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