Andreas Fery
Institut für Polymerforschung Dresden and Technical University Dresden, Hohe Str. 6, 01067 Dresden, Germany *Email: fery@ipfdd.de
Hamburg University of Technology, Institute of Applied Polymer Physics, Harburger Schloßstr. 22a, 21079 Hamburg
Abstract
Polymer surface modification offers unique possibilities for creating interactive and functional materials. Polymer grafting in particular can be employed for nanoscale control both on macroscopic surfaces and for nanoparticles. I will discuss the implications for self-reporting surfaces and metamaterials.
Polymer brush surfaces that alter their physical properties in response to chemical stimuli have the capacity to be used as so-called Messenger Materials. These materials translate local physicochemical changes into spatially-resolved modulation of fluorescence [1]. This approach can be used for unraveling contact mechanics and friction in complex scenarios, as well as clarify mechanisms acting in responsive and adaptive surface coatings [2].
Polymer modification of nanoparticles results in hairy nanoparticles, which find a range of applications in functional materials [3]. Especially metallic nanoparticles offer a number of interesting optical and electronic effects due to their localized surface plasmon resonance (LSPR). Adding a functional polymeric shell does not only allow controlling inter-particle distances but as well tailored transport / electronic coupling [3,4]. Increasing the level of complexity, the ordering of particles at different length scales opens another powerful route to optical and electronic functionality due to novel collective plasmonic excitations arising from plasmonic coupling effects. We focus on achieving such ordered particle arrays through self-assembly approaches. Colloidal self-assembly can indeed yield well-defined colloidal clusters and surface arrays in which coupling effects can be controlled. In particular, large-scale assemblies are possible in combination with biomimetic surface patterning like controlled wrinkling. We discuss the underlying physicochemical principles of the structure formation process and the resulting plasmonic coupling effects including chiroplasmonic metamaterial effects [5,6]. Finally, we present perspectives on how these assembly principles can be relevant for developing circular economy approaches for advanced materials.
Keywords
polymer brushes, messenger materials, plasmonics, circular dichroism, metamaterials, particle based materials, circular materials
References
[1] Quinn A. Besford, Chrstian Rossner, Andreas Fery, Advanced Functional Materials 2023, 33 (32), 2214915
[2] Quinn A. Besford, Huaisong Yong, Holger Merlitz, Andrew J. Christofferson, Jens‐Uwe Sommer, Petra Uhlmann, Andreas Fery, Angewandte Chemie International Edition 2021, 60 (30), 16600-16606
[3] Rossner, C.; König, T. A. F.; Fery, A., Hairy Plasmonic Nanoparticles. In Hairy Nanoparticles: From Synthesis to Applications, 1 ed.; Lin, Z.; Liu, Y., Eds. WILEY-VCH GmbH: Weinheim, 2023; pp 351-374.2.
[4] Sun, N.; Singh, S.; Zhang, H.; Hermes, I.; Zhou, Z., .; Schlicke, H.; Vaynzof, Y.; Lissel*, F.; Fery, A., Gold Nanoparticles with N-Heterocyclic Carbene/Triphenylamine Surface Ligands: Stable and Electrochromically Active Hybrid Materials with Potential for Optoelectronics Cells. Advanced Science 2024, 11 (2400752), 1-8.
[5] Probst, P. T.; Mayer, M.; Gupta, V.; Steiner, A. M.; Zhou, Z.; Auernhammer, G. K.; König, T. A. F.; Fery, A., Mechano-tunable chiral metasurfaces via colloidal assembly. Nature Materials 2021, 20, 1024–1028.
[6] Probst, P. T.; Dong, Y.; Zhou, Z.; Aftenieva, O.; Fery, A., Bottom‐Up Assembly of Inorganic Particle‐Based Chiroptical Materials. Advanced Optical Materials 2024, 12 (5), 2301834.
Speaker's Introduction
Andreas Fery is head of the institute for Physical Chemistry at Leibniz Institut für Polymerforschung Dresden since 2015. He studied Physics at Konstanz University and did his PhD and habilitation at the Max-Planck Institute for Colloids and Interfaces/Potsdam University in 2000. In 2007 he joined Bayreuth University as professor and received an ERC starting grant in 2012. His research interests are in in Polymer science and Colloid and interface science with an emphasis on soft functional materials and sustainability. He is coordinating the graduate school “From particle based materials to optical and electronic devices” and he is deputy spokesperson of the cluster of excellence “Responsible electronics in the climate change era”. His h-index is 75 and his publications have received more than 19000 citations.
