Rate of dimer formation in stable colloidal solutions quantified using an attractive interparticle force
| Autor: | L.J. van IJzendoorn, A. R. Romijn, Menno Willem Jose Prins, M. R. W. Scheepers |
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| Přispěvatelé: | Molecular Biosensing for Med. Diagnostics, Applied Physics and Science Education, Eindhoven School of Education |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Field (physics) Dimer Ionic bonding 02 engineering and technology Surfaces and Interfaces 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Light scattering Article 0104 chemical sciences Magnetic field chemistry.chemical_compound Colloid chemistry Orders of magnitude (time) Chemical physics Electrochemistry Cluster (physics) General Materials Science 0210 nano-technology Spectroscopy |
| Zdroj: | Langmuir Langmuir, 35(32), 10533-10541. American Chemical Society |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/acs.langmuir.9b01461 |
| Popis: | We describe an optomagnetic cluster experiment to understand and control the interactions between particles over a wide range of time scales. Aggregation is studied by magnetically attracting particles into dimers and by quantifying the number of dimers that become chemically bound within a certain time interval. An optomagnetic readout based on light scattering of rotating clusters is used to measure dimer formation rates. Magnetic field settings, that is, field rotation frequency, field amplitude, and on-and off-Times, have been optimized to independently measure both the magnetically induced dimers and chemically bound dimers. The chemical aggregation rate is quantified in solutions with different pH and ionic strengths. The measured rates are extrapolated to effective dimer formation rates in the absence of force, showing that aggregation rates can be quantified over several orders of magnitude, including conditions of very low chemical reactivity. |
| Databáze: | OpenAIRE |
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