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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Local mechanical response of cells to the controlled rotation of magnetic nanorods
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Local mechanical response of cells to the controlled rotation of magnetic nanorods

机译:电池的局部机械响应到磁纳米棒的受控旋转

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摘要

The mechanical response of the cytoplasm was investigated by the intracellular implantation of magnetic nanorods and exposure to low-frequency rotatory magnetic fields. Nanorods (Pt-Ni, similar to 200 nm diameter) fabricated by electrodeposition in templates of porous alumina with lengths of approximately 2 and 5 mu m were inserted into NIH/3T3 fibroblasts and manipulated with a rotational magnetic field. Nanorod rotation was observed only for torques greater than 3.0 x 10(-16) Nm, suggesting a Bingham-type behavior of the cytoplasm. Higher torques produced considerable deformation of the intracellular material. The cell nucleus and cell membrane were significantly deformed by nanorods actuated by 4.5 x 10(-15) Nm torques. Our results demonstrate that nanorods under magnetic fields are an effective tool to mechanically probe the intracellular environment. We envision that our findings may contribute to the noninvasive and direct mechanical characterization of the cytoplasm. (C) 2014 Wiley Periodicals, Inc.
机译:通过磁纳米杆的细胞内植入和暴露于低频旋转磁场的机械响应来研究细胞质的机械响应。通过电沉积在多孔氧化铝模板中制造的纳米棒(PT-Ni,类似于200nm直径),其长度约为2和5μm,插入NiH / 3T3成纤维细胞中,并用旋转磁场操纵。仅针对大于3.0×10(-16)nm的扭矩观察纳米棒旋转,表明细胞质的弯曲型行为。更高的扭矩产生了细胞内材料的相当变形。细胞核和细胞膜通过致动4.5×10(-15)nm扭矩的纳米棒显着变形。我们的结果表明,磁场下的纳米棒是机械探测细胞内环境的有效工具。我们设想我们的发现可能有助于细胞质的非侵入性和直接机械表征。 (c)2014 Wiley期刊,Inc。

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