期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 321, 期 10, 页码 1377-1380出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2009.02.134
关键词
Nanoparticle; Iron oxide; pNIPAAm; Biomedical application; Triggered drug delivery; Temperature-sensitive behavior
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. (C) 2009 Elsevier B.V. All rights reserved.
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