Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 39: French-German Session: Nanomaterials, Composites and Hybrids I

CPP 39.5: Vortrag

Mittwoch, 11. März 2026, 16:15–16:30, ZEU/0260

Particle distribution and thermoresponsive properties of PNIPAM brush/gold nanoparticle composite films — •Elias Hallenbach, Marvin Glock, Hayden Robertson, and Regine von Klitzing — TU Darmstadt, Institute for Condensed Matter Physics, 64289 Darmstadt, Germany

Metal/polymer nanocomposites are versatile hybrid materials and find use in many fields such as photonics, biomedical engineering and catalysis. A promising realization of this type of hybrid material is the controlled self-assembly of gold nanoparticles (AuNPs) inside a polymer brush, which induces color changes upon exposure to environmental changes, enabling sensor applications.
Polymer brushes can serve as a matrix for the immobilization of AuNPs. Particle uptake into the brush matrix is affected by parameters such as thickness, particle size and grafting density [1]. Nanoparticle uptake has proven to be highest at intermediate grafting densities [2]. In the present study thermoresponsive Poly(N-Isopropylacrylamide) brushes with varying grafting densities were synthesized directly from a silicon substrate. Nanocomposite materials were fabricated by dip-coating of polymer brushes into an AuNP suspension. Characterization of nanocomposites was performed by (in situ) spectroscopic ellipsometry, atomic force microscopy and (in situ) X-ray reflectometry. The relation between particle distribution and temperature-induced structural changes will be discussed.
[1] S. Christau et al., Polymers 2014, 6, 1877-1896.
[2] R.R. Bhat, J. Genzer, Appl. Surf. Sci. 2006, 252, 2549-2554.

Keywords: nanocomposite films; polymer brush; PNIPAM; gold nanoparticles