Publikationen

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/nanoparticle-assemblies-as-probes-for-selfassembled-monolayer-characterization-correlation-between-surface-functionalization-and-agglomeration-behavior(0ab75fbe-9463-4652-ada7-eb86e59f0333).html