Biological and Magnetic Contrast Evaluation of Shape-Selective Mn-Fe Nanowires
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摘要One-dimensional composite Mn-Fe oxide nanostructures of different sizes (nanoneedles, nanorods, and nanowires) were prepared by a linker-induced organization of manganese-doped iron oxide nanoparticles. The nanostructures were obtained by the treatment of MnFe(2)O(4) nanoparticles in the presence of cystamine. The average lengths of nanoneedle, nanorod, and nanowire are approximately 400, 800, and 1000 nm, respectively. High-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray (EDX) spectroscopy, and inductively coupled plasma-optical emission spectroscopy (ICP-OES) were employed to characterize the morphologies and the elemental contents of the nanostructures. As an example of their potential applications, these nanostructures were explored as the cell-labeling agents for magnetic resonance imaging (MRI). The magnetic contrast properties of the nanostructures were characterized by a 1.5 T (Tesla) whole body MR system. 10 mu g/mL of the nanostructures caused substantial negative contrast. After in vitro incubation, the nanostructures could be effectively incorporated into the cells of a monocyte/macrophage cell line (RAW264.7). These cells' viability and proliferation potential were not affected when the labeling concentration was less than 50 mu g/mL.
著者Leung KCF, Wang YXJ, Wang HH, Xuan SH, Chak CP, Cheng CHK
期刊名稱IEEE Transactions on NanoBioscience
出版年份2009
月份6
日期1
卷號8
期次2
出版社Institute of Electrical and Electronics Engineers (IEEE)
頁次192 - 198
國際標準期刊號1536-1241
語言英式英語
關鍵詞Iron oxide; macrophage; magnetic resonance imaging; nanobiotechnology; nanoparticle; nanowire
Web of Science 學科類別Biochemical Research Methods; BIOCHEMICAL RESEARCH METHODS; Biochemistry & Molecular Biology; Nanoscience & Nanotechnology; NANOSCIENCE & NANOTECHNOLOGY; Science & Technology - Other Topics

上次更新時間 2021-19-09 於 23:49