Swelling of Poly(methyl acrylate) Brushes in Acetone Vapor
| Autor: | Marco Cirelli, Nieck E. Benes, Aleksandar Andreski, Paloma S. Dueñas Robles, Mark A. Hempenius, Cas Damen, Maria G. Elshof, Maria Brió Pérez, Sissi de Beer, Rens J. Horst, Rick Cohen |
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| Přispěvatelé: | Materials Science and Technology of Polymers, MESA+ Institute, Inorganic Membranes |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
UT-Hybrid-D 02 engineering and technology Degree of polymerization Poly(methyl acrylate) 010402 general chemistry 01 natural sciences digestive system Article chemistry.chemical_compound Electrochemistry Acetone medicine General Materials Science Methyl acrylate Spectroscopy chemistry.chemical_classification technology industry and agriculture food and beverages Surfaces and Interfaces Quartz crystal microbalance Polymer 021001 nanoscience & nanotechnology Condensed Matter Physics Grafting 0104 chemical sciences chemistry Chemical engineering Swelling medicine.symptom 0210 nano-technology |
| Zdroj: | Langmuir Langmuir, 36(40), 12053-12060. American Chemical Society |
| ISSN: | 0743-7463 |
| Popis: | Sensor platforms can benefit from the incorporation of polymer brushes since brushes can concentrate the analyte near the sensor surface. Brushes that absorb acetone vapor are of particular interest since acetone is an important marker for biological processes. We present a simple procedure to synthesize acetone-responsive poly(methyl acrylate) brushes. Using spectroscopic ellipsometry, we show that these brushes respond within seconds and swell by more than 30% when exposed to acetone vapor. Moreover, quartz crystal microbalance measurements demonstrate that the brushes can be exploited to increase the acetone detection sensitivity of sensors by more than a factor 6. Surprisingly, we find that the swelling ratio of the brushes in acetone vapor is independent of the grafting density and the degree of polymerization of the polymers in the brush. This is qualitatively different from swelling of the same brushes in liquid environments, where the swelling ratio decreases for increasing grafting densities. Yet, it indicates that the brushes are robust and reproducible candidates for implementation in vapor sensor systems. |
| Databáze: | OpenAIRE |
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