Probing temperature-sensitive behavior of pNIPAAm-coated iron oxide nanoparticles using frequency-dependent magnetic measurements
Probing temperature-sensitive behavior of pNIPAAm-coated iron oxide nanoparticles using frequency-dependent magnetic measurements
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DOI：
10.1016/j.jmmm.2009.02.134
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发表时间：
2009-05-01
影响因子：
2.7
通讯作者：
Krishnan, Kannan M.
中科院分区：
文献类型：
--
作者：
Kalele, Suchita;Narain, Ravin;Krishnan, Kannan M.
以油酸铁配合物为原料，十八烯为溶剂，通过高温热分解法制备了粒径约为33 nm的铁磁性氧化铁纳米粒子。这些颗粒随后通过表面活性剂交换方法用聚N-异丙基丙烯酰胺（pNIPAAm）包覆。使用交流磁化率和动态光散射（DLS）测量这些颗粒的温度敏感行为进行了研究。交流磁化率的虚部的位移与pNIPAAm作为温度的函数的膨胀和崩溃。(C)2009 Elsevier B. V.保留所有权利。
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.