Publications de Harm-Anton Klok

Biodegradable Polymers for Plant Nutrient Delivery and Recovery

The current use of fertilizers is inefficient and not sustainable. The majority of the fertilizer applied does not reach the targeted crop but is lost in the water bodies and into the atmosphere, with harmful impact on the environment. To enhance the effic ...

WILEY-V C H VERLAG GMBH2025

Supramolecular Polymer Brushes Grafted via Atom Transfer Radical Polymerization from Surfaces Presenting Non-covalent, Host-Guest Complex-Based Initiators

Harm-Anton Klok, Friederike Katharina Metze

This paper describes the synthesis of supramolecular polymer brushes via surface-initiated polymerization from adamantane-functionalized initiators that are noncovalently bound to beta-cyclodextrin- or cucurbit[7]uril-modified substrates. Surface-initiated ...

American Chemical Society2025

Orthogonally Functionalizable Redox-Responsive Polymer Brushes: Catch and Release Platform for Proteins and Cells

Harm-Anton Klok

American Chemical Society (ACS)2025

Chemically Recyclable, Hydroxycinnamic Acid‐Derived Semi‐Aromatic Polycarbonates

Harm-Anton Klok, Pascal Alexander Schouwink, Ghezae Tekleab

Polycarbonate polymers find widespread use for a variety of applications. Driven by the need to transition away from fossil‐based resources, there is increasing interest in exploring bio‐based monomers for the synthesis of polycarbonates. One interesting c ...

Wiley2025

Pyroelectric Polyelectrolyte Brushes

Dragan Damjanovic, Harm-Anton Klok, Sabrina Sant, Fei Hu, Jian Wang, Lukas Riemer, Kanghyun Chu

Piezo- and pyroelectric materials are of interest, for example, for energy harvesting applications, for the development of tactile sensors, as well as neuromorphic computing. This study reports the observation of pyro- and piezoelectricity in thin surface- ...

Wiley-V C H Verlag Gmbh2024

Synthesis of Amino Acid-Based Aromatic Poly(Ester Urea)s Using 4-Hydroxycinnamic Acid-Derived Diols

Harm-Anton Klok, Ghezae Tekleab

Amino acid-based poly(ester urea)s are an attractive class of polymers that are of interest for a variety of biomedical applications. Generally, amino acid-based poly(ester urea)s are prepared by polymerization of diamines, which are obtained from the corr ...

2024

The Structural Dispersity of Oligoethylene Glycol-Containing Polymer Brushes Determines Their Interfacial Properties

Harm-Anton Klok, Alberto Ongaro, Irene Filipucci

Ought to their bioinert properties and facile synthesis, poly[(oligoethylene glycol)methacrylate]s (POEGMAs) have been raised as attractive alternatives to poly(ethylene glycols) (PEGs) in an array of (bio)material applications, especially when they are ap ...

Amer Chemical Soc2024

Disulfide-Cross-Linked Tetra-PEG Gels

Harm-Anton Klok, Zhao Meng

The preparation of polymer gels via cross-linking of four-arm star-shaped poly(ethylene glycol) (Tetra-PEG) precursors is an attractive strategy to prepare networks with relatively well-defined topologies. Typically, Tetra-PEG gels are obtained by cross-li ...

American Chemical Society2024

Swelling and Degrafting of Poly(3-sulfopropyl methacrylate) Brushes

Harm-Anton Klok, Sabrina Sant, Kuljeet Kaur

Upon exposure to a good solvent, polymer brushes prepared via surface-initiated polymerization can undergo degrafting via cleavage of bonds that anchor the polymer tethers to the underlying substrate. As polymer brushes are often used in a solvent swollen ...

American Chemical Society (ACS)2024

Ion Adsorption Enhances Apparent Nonelectrostatic Attraction between Monomers in Polyelectrolyte Brushes

Harm-Anton Klok, Xingyu Xu, Jing Yu

Polyelectrolyte brushes are responsive to salt in the environment, and this has found broad applications in antifouling, biolubrication, and drug delivery. Salt primarily influences the conformation of the polyelectrolytes through ion adsorption. While ion ...

American Chemical Society2024