Nano- and Microcarriers

Polymer colloids and nanocarriers 

We develop tailored polymer colloids and bridge their structural and surface properties to function, with the big goal of improving human life and the environment for medicine and agriculture.

In this interdisciplinary research, we use a unique variety of techniques, starting from the synthesis of well-defined macromolecules, and colloids to their in-depth characterization and biological and functional testing. We develop tailor-made colloids using self-assembly, microemulsion, and miniemulsion techniques. To unravel the properties of colloids, we combine a range of advanced characterization techniques, particularly Static and Dynamic Light Scattering in water and complex physiological media, such as serum, Small-Angle Neutron Scattering (SANS), NMR spectroscopy, and various microscopy methods (SEM; AFM). We connect fundamental concepts of macromolecular and colloid chemistry to application.

 Currently, we focus on two research domains:

Nanocarriers for Medicine: Drug delivery and imaging

Our research focuses on colloids, such as polymer micelles, nanocapsules, and other colloidal nanostructures for heteronuclear, “hot spot” Magnetic Resonance Imaging (MRI) via 19F and 31P nuclei, ultrasound, and optoacoustic imaging as well as nanocarriers for the delivery of therapeutics.

To achieve this goal, it is essential to synthesize tailored colloids, understand how they interact with biomolecules and cells, and link the molecular and structural properties of colloids to their function, for example to the magnetic resonance characteristics. Therefore, the structure-function relationship builds the core of this research.

In our approach, we go beyond the sole performance of colloids. Nowadays, environmental pollution by medical residues has become a concerning issue that eventually will have a strong impact on human health. We consider the interplay between humans and the environment and focus on the development of sustainable biomedical colloids, for example, reducing the use of per- and polyfluoroalkyl substances (PFAS) and other toxic compounds.

Selected publications:

Koshkina, O. , Raju, L. T., Kaltbeitzel, A., Riedinger, A. , Lohse, D. , Zhang, X., & Landfester, K. (2022). Surface Properties of Colloidal Particles Affect Colloidal Self-Assembly in Evaporating Self-Lubricating Ternary DropletsACS applied materials & interfaces14(1), 2275-2290.

Hoogendijk, E., Swider, E., Staal, A. H. J., White, P. B., Van Riessen, N. K., Glaßer, G., Lieberwirth, I., Musyanovych, A., Serra, C. A., Srinivas, M. , & Koshkina, O. (2020). Continuous-Flow Production of Perfluorocarbon-Loaded Polymeric Nanoparticles: From the Bench to ClinicACS applied materials & interfaces12(44), 49335-49345.

Koshkina, O. , Lajoinie, G., Baldelli Bombelli, F., Swider, E., Cruz, L. J., White, P. B., Schweins, R., Dolen, Y., van Dinther, E. A. W., van Riessen, N. K., Rogers, S. E., Fokkink, R., Voets, I. K., van Eck, E. R. H., Heerschap, A. , Versluis, M. , de Korte, C. L. , Figdor, C. G., de Vries, I. J. M., & Srinivas, M. (2019). Multicore Liquid Perfluorocarbon-Loaded Multimodal Nanoparticles for Stable Ultrasound and 19 F MRI Applied to In Vivo Cell TrackingAdvanced functional materials29(19), [1806485].

 Sustainable Agriculture: Agrochemical Delivery without microplastics

To make agriculture sustainable and reduce, or ideally completely avoid pesticide spraying, we translate the concepts of drug delivery plants. Therefore, we develop nanocarriers that can be injected into the trunk of a plant and serve as a selective depot for the pesticide or other drug instead of unselective spraying.

This research line starts with the synthesis of tailored biodegradable colloids, using natural materials for example lignin, which is a waste from the paper industry. We further translate the production to a larger scale and finally perform field tests in our garden at UT.

Selected publications:

S.J. Beckers, A.H.J. Staal, C. Rosenauer, M. Srinivas, K. Landfester, F.R. Wurm, Targeted Drug Delivery for Sustainable Crop Protection: Transport and Stability of Polymeric Nanocarriers in Plants, Advanced Science 8(11) (2021) 2100067

J. Fischer, S.J. Beckers, D. Yiamsawas, E. Thines, K. Landfester, F.R. Wurm, Targeted Drug Delivery in Plants: Enzyme-Responsive Lignin Nanocarriers for the Curative Treatment of the Worldwide Grapevine Trunk Disease Esca, Advanced Science 6(15) (2019) 1802315

T.O. Machado, J. Grabow, C. Sayer, P.H.H. de Araújo, M.L. Ehrenhard, F.R. Wurm, Biopolymer-based nanocarriers for sustained release of agrochemicals: A review on materials and social science perspectives for a sustainable future of agri- and horticulture, Adv. Colloid Interface Sci. 303 (2022) 102645.