TY - JOUR
T1 - Modification of silicon nitride with oligo(ethylene glycol)-terminated organophosphonate monolayers
AU - Bartl, Johannes D.
AU - Gremmo, Stefano
AU - Stutzmann, Martin
AU - Tornow, Marc
AU - Cattani-Scholz, Anna
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/7
Y1 - 2020/7
N2 - 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.
AB - 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.
KW - Interface stability
KW - Organophosphonate interfaces
KW - Silicon nitride
KW - Surface functionalization
UR - http://www.scopus.com/inward/record.url?scp=85083591778&partnerID=8YFLogxK
U2 - 10.1016/j.susc.2020.121599
DO - 10.1016/j.susc.2020.121599
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AN - SCOPUS:85083591778
SN - 0039-6028
VL - 697
JO - Surface Science
JF - Surface Science
M1 - 121599
ER -