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Probing temperature-sensitive behavior of pNIPAAm-coated iron oxide nanoparticles using frequency-dependent magnetic measurements |
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| Authors: | Suchita Kalele Kannan M. Krishnan |
| Affiliation: | a Department of Materials Science and Engineering, University of Washington, 323 Roberts Hall, Box 352120, Seattle, WA 98195-2120, USA b Department of Chemistry and Biochemistry, Laurentian University, Sudbury, ON, Canada P3E 2C6 |
| Abstract: | Ferromagnetic iron oxide nanoparticles of about 33 nm in diameter were synthesized by high-temperature decomposition of an iron-oleate complex, using octadecene as the solvent. These particles were subsequently coated with polyN-isopropylacrylamide (pNIPAAm) by a surfactant exchange method. Temperature-sensitive behavior of these particles was studied using ac susceptibility and dynamic light scattering (DLS) measurements. Shifts in the imaginary part of the ac susceptibility are correlated with swelling and collapse of pNIPAAm as a function of temperature. |
| Keywords: | Nanoparticle Iron oxide pNIPAAm Biomedical application Triggered drug delivery Temperature-sensitive behavior |
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