Nanoparticle Assemblies as Probes for Self-Assembled Monolayer Characterization: Correlation between Surface Functionalization and Agglomeration Behavior

Autor(en)

Bernhard Feichtenschlager, Silvia Pabisch, Herwig Peterlik, Guido Kickelbick

Abstrakt

The ordering of dodecyl chains has been investigated in mixed monolayers of phosphonic acid capping agents on the surface of hydrothermally prepared zirconia nanocrystals. Methyl-, phenyl-, pyryl-, and tert-butylphosphonic acids have been used to investigate series with different mixing ratios with dodecylphosphonic acid as the cocapping agent for the mixed monolayer formation. Fourier transform infrared (FTIR) studies revealed that an increasing amount (different for each type) of coadsorbed capping agent reduces the ordering of the dodecyl chains significantly. Small-angle X-ray scattering (SAXS) verified that with increasing amount of cocapping agent the agglomeration of the particles decreases. The strong correlation of the agglomeration behavior with the ordering of the surface-bound alkyl chains leads to the conclusion that interparticle bilayers, formed via long alkyl chain packing, are responsible and can be controlled on a molecular level by coadsorbing various molecules. On the basis of this correlation, nanoparticles can be used as probes for self-assembled monolayer investigation by an indirect structural method (SAXS) and correlated with the routine spectroscopical method for the chemical analysis of surface groups (FTIR).

Organisation(en)

Dynamik Kondensierter Systeme

Externe Organisation(en)

Technische Universität Wien, Universität des Saarlandes

Journal

Langmuir: the A C S journal of surfaces and colloids

Band

28

Seiten

741-750

Anzahl der Seiten

10

ISSN

0743-7463

DOI

https://doi.org/10.1021/la2023067

Publikationsdatum

2012

Peer-reviewed

Ja

ÖFOS 2012

103009 Festkörperphysik, 103015 Kondensierte Materie, 103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/0ab75fbe-9463-4652-ada7-eb86e59f0333