Filtration of Nanoparticle Agglomerates in Aqueous Colloidal Suspensions Exposed to an External Radio-Frequency Magnetic Field
| Autor: | Lidia Najder-Kozdrowska, Andrzej Drzewiński, Mirosław R. Dudek, Wiktor Wolak, Maciej Marć |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
General Chemical Engineering Nanoparticle filtration of nanoparticle agglomerates 02 engineering and technology bare and silica-coated nanoparticles 010402 general chemistry 01 natural sciences Article law.invention Suspension (chemistry) chemistry.chemical_compound Colloid law General Materials Science QD1-999 Filtration magnetic heating Aqueous solution digestive oral and skin physiology 021001 nanoscience & nanotechnology equipment and supplies 0104 chemical sciences Magnetic field Condensed Matter::Soft Condensed Matter Chemistry chemistry Chemical engineering Agglomerate 0210 nano-technology human activities Iron oxide nanoparticles |
| Zdroj: | Nanomaterials, Vol 11, Iss 1737, p 1737 (2021) Nanomaterials Volume 11 Issue 7 |
| ISSN: | 2079-4991 |
| Popis: | The study investigated the phenomenon of the fast aggregation of single-domain magnetic iron oxide nanoparticles in stable aqueous colloidal suspensions due to the presence of a radio-frequency (RF) magnetic field. Single-domain nanoparticles have specific magnetic properties, especially the unique property of absorbing the energy of such a field and releasing it in the form of heat. The localized heating causes the colloid to become unstable, leading to faster agglomeration of nanoparticles and, consequently, to rapid sedimentation. It has been shown that the destabilization of a stable magnetic nanoparticle colloid by the RF magnetic field can be used for the controlled filtration of larger agglomerates of the colloid solution. Two particular cases of stable colloidal suspensions were considered: a suspension of the bare nanoparticles in an alkaline solution and the silica-stabilized nanoparticles in a neutral solution. The obtained results are important primarily for biomedical applications and wastewater treatment. |
| Databáze: | OpenAIRE |
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