On Demand Sequential Release of (Sub)Micron Particles Controlled by Size and Temperature
| Autor: | Andreas Lendlein, Oliver E. C. Gould, Karl Kratz, Yue Liu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers Temperature General Chemistry Polymer Microscopy Atomic Force Controlled release Catalysis Biomaterials Matrix (chemical analysis) chemistry.chemical_compound chemistry Chemical engineering ddc:570 On demand Polystyrenes Institut für Chemie Microtechnology General Materials Science Particle size Polystyrene Particle Size ddc:620 Biotechnology |
| Zdroj: | Liu, Y.; Gould, O.; Kratz, K.; Lendlein, A.: On Demand Sequential Release of (Sub)Micron Particles Controlled by Size and Temperature. In: Small. Vol. 18 (2022) 5, 2104621. (DOI: /10.1002/smll.202104621) |
| ISSN: | 1613-6810 |
| DOI: | 10.1002/smll.202104621) |
| Popis: | Polymeric devices capable of releasing submicron particles (subMP) on demand are highly desirable for controlled release systems, sensors, and smart surfaces. Here, a temperature-memory polymer sheet with a programmable smooth surface served as matrix to embed and release polystyrene subMP controlled by particle size and temperature. subMPs embedding at 80 degrees C can be released sequentially according to their size (diameter D of 200 nm, 500 nm, 1 mu m) when heated. The differences in their embedding extent are determined by the various subMPs sizes and result in their distinct release temperatures. Microparticles of the same size (D approximate to 1 mu m) incorporated in films at different programming temperatures T-p (50, 65, and 80 degrees C) lead to a sequential release based on the temperature-memory effect. The change of apparent height over the film surface is quantified using atomic force microscopy and the realization of sequential release is proven by confocal laser scanning microscopy. The demonstration and quantification of on demand subMP release are of technological impact for assembly, particle sorting, and release technologies in microtechnology, catalysis, and controlled release. |
| Databáze: | OpenAIRE |
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