Thermoreversible Surface Polymer Patches: A Cryogenic Transmission Electron Microscopy Investigation
Rossner C, Letofsky-Papst I, Fery A, Lederer A, Kothleitner G (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 34
Pages Range: 8622-8628
Journal Issue: 29
DOI: 10.1021/acs.langmuir.8b01742
Abstract
Hybrid core-shell type nanoparticles from gold nanoparticle cores and poly(N-isopropylacrylamide) shells were investigated with regard to their structural plasticity. Reversible addition-fragmentation chain transfer polymerization was used to synthesize well-defined polymers that can be readily anchored onto the gold nanoparticle surface. The polymer shell morphologies were directly visualized in their native solution state at high resolution by cryogenic transmission electron microscopy, and the microscopic results were further corroborated by dynamic light scattering. Different environmental conditions and brush architectures are covered by our experiments, which leads to distinct thermally induced responses. These responses include constrained dewetting of the nanoparticle surface at temperatures above the lower critical solution temperature of poly(N-isopropylacrylamide), leading to surface polymer patches. This effect provides a novel approach toward breaking the symmetry of nanoparticle interactions, and we show first evidence for its impact on the formation of colloidal superstructures.
Involved external institutions
Technische Universität Graz
Austria (AT)
Leibniz-Institut für Polymerforschung Dresden e. V.
Germany (DE)
Austria (AT)
Leibniz-Institut für Polymerforschung Dresden e. V.
Germany (DE)
How to cite
APA:
Rossner, C., Letofsky-Papst, I., Fery, A., Lederer, A., & Kothleitner, G. (2018). Thermoreversible Surface Polymer Patches: A Cryogenic Transmission Electron Microscopy Investigation. Langmuir, 34(29), 8622-8628. https://doi.org/10.1021/acs.langmuir.8b01742
MLA:
Rossner, Christian, et al. "Thermoreversible Surface Polymer Patches: A Cryogenic Transmission Electron Microscopy Investigation." Langmuir 34.29 (2018): 8622-8628.
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