Magnetite nanoparticles embedded in biodegradable porous silicon |
| |
Authors: | P Granitzer K Rumpf AG Roca MP Morales P Poelt M Albu |
| |
Institution: | 1. Institute of Semiconductor Physics, 41 Prospect Nauki, 03028 Kyiv, Ukraine;2. Taras Shevchenko National University of Kyiv, 64 Volodymyrs''ka St., 01601 Kyiv, Ukraine;3. O.O. Chuiko Institute of Surface Chemistry, 17 Generala Naumova St., 03164 Kyiv, Ukraine |
| |
Abstract: | 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)/field cooled (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. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|