Nanoparticle-based Materials

Our Research

Nanoparticles exhibit unique properties due to their small size and high surface-to-volume ratios. They can be made from various materials, including metals and semiconductors, which impart magnetic and electro-optical properties. In our group, we investigate the parameters and kinetics of different nanoparticle synthesis methods using SAXS/WAXS and TEM.

To facilitate this, we designed a special glass vessel that allows us to monitor reactions at 320°C in situ under an Argon atmosphere. Additionally, we coat the particles with different polymers to stabilize them and make them compatible with various polymer matrices, preventing aggregation. These dispersed nanoparticles enhance the properties of the polymers and can be highly concentrated due to their compatibility.

Using block copolymers as coatings enables us to form highly ordered self-assembly structures in bulk materials through slow evaporation. Since nanoparticles are not necessarily spherical, we also synthesize and investigate various shapes, such as octahedra, hexagonal cylinders, and platelets.

Group Members

Publications

A General Route to Optically Transparent Highly Filled Polymer Nanocomposites
Sascha Ehlert, Corinna Stegelmeier, Daniela Pirner, and Stephan Förster
Macromolecules 2015 48 (15), 5323-5327
DOI: 10.1021/acs.macromol.5b00565

Nanoparticle Heat-Up Synthesis: In Situ X-ray Diffraction and Extension from Classical to Nonclassical Nucleation and Growth Theory
Vanessa Leffler, Sascha Ehlert, Beate Förster, Martin Dulle, and Stephan Förster
ACS Nano 2021 15 (1), 840-856
DOI: 10.1021/acsnano.0c07359

3D-Positioning of Nanoparticles in High-Curvature Block Copolymer Domains
Vanessa B. Leffler, Sascha Ehlert, Beate Förster, Martin Dulle, Stephan Förster
Angewandte Chemie 2021 Volume 133, Issue 32
https://doi.org/10.1002/ange.202102908

Size Control of Iron Oxide Nanoparticles Synthesized by Thermal Decomposition Methods
Vladislava Fokina, Manuel Wilke, Martin Dulle, Sascha Ehlert, and Stephan Förster
The Journal of Physical Chemistry C 2022 126 (50), 21356-21367
DOI: 10.1021/acs.jpcc.2c05380

Last Modified: 01.10.2024