Magnetite nanoparticles embedded in biodegradable porous silicon
Magnetite nanoparticles embedded in biodegradable porous silicon
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DOI：
10.1016/j.jmmm.2009.03.022
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发表时间：
2010-05-01
影响因子：
2.7
通讯作者：
Albu, M.
中科院分区：
文献类型：
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作者：
Granitzer, P.;Rumpf, K.;Albu, M.
磁铁矿纳米粒子，这是用油酸在己烷溶液中，并表现出平均直径为7.7 nm，嵌入在多孔硅（PS）矩阵下的规定参数（如浓度，温度，时间）的浸泡。多孔硅基质通过在HF水溶液中阳极氧化高度n掺杂的硅晶片来制备。样品的磁性表征已通过SQUID-磁力仪进行。的磁铁矿纳米粒子的超顺磁性的行为是由温度依赖的磁化测量。零场（ZFC）/场冷（FC）实验表明粒子之间的磁相互作用。为了渗透到PS模板中，使用不同浓度的磁铁矿纳米颗粒，并相对于颗粒之间的磁相互作用进行磁化测量。所实现的多孔硅/磁铁矿试样不仅是有趣的，因为它们之间的超顺磁性和铁磁性行为的过渡，因此对于磁性应用，但也因为两种材料的非毒性，使有机会采用该系统在医疗应用中的药物输送或在医疗诊断。(C)2009爱思唯尔有限公司版权所有。
Magnetite nanoparticles, which are coated with oleic acid in a hexane solution and exhibit an average diameter of 7.7 nm, were embedded in a porous silicon (PS) matrix by immersion under defined parameters (e.g. concentration, temperature, time). The porous silicon matrix is prepared by anodization of a highly n-doped silicon wafer in an aqueous HF-solution. Magnetic characterization of the samples has been performed by SQUID-magnetometry. The superparamagnetic behaviour of the magnetite nanoparticles is represented by temperature-dependent magnetization measurements. Zero field (ZFC)/fieldcooled (FC) experiments indicate magnetic interactions between the particles. For the infiltration into the PS-templates different concentrations of the magnetite nanoparticles are used and magnetization measurements are performed in respect with magnetic interactions between the particles. The achieved porous silicon/magnetite specimens are not only interesting due to their transition between superparamagnetic and ferromagnetic behaviour, and thus for magnetic applications but also because of the non-toxicity of both materials giving the opportunity to employ the system in medical applications as drug delivery or in medical diagnostics. (C) 2009 Elsevier B.V. All rights reserved.