Electroless synthesis of 3 nm wide alloy nanowires inside Tobacco mosaic virus
Electroless synthesis of 3 nm wide alloy nanowires inside Tobacco mosaic virus
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DOI：
10.1088/0957-4484/23/4/045603
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发表时间：
2012-02-03
期刊：
影响因子：
3.5
通讯作者：
Bittner, Alexander M.
中科院分区：
文献类型：
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作者：
Balci, Sinan;Hahn, Kersten;Bittner, Alexander M.
结果表明，通过在管状烟草花叶病毒颗粒内部进行简单的湿化学沉积，可以制备出3 nm宽的钴铁合金纳米线。该方法基于对Pd(II)离子的吸附，形成Pd催化剂，以及从溶解的金属盐中自催化沉积合金，该金属盐被硼烷化合物还原。纳米尺度的能量过滤电子显微镜研究表明，所合成的线材是Co、Fe和Ni的合金。我们用高分辨电子显微镜证实，我们的合金纳米线至少是部分结晶的，这与典型的富钴合金是相容的。镍的痕迹具有更高的稳定性，推测可以防止腐蚀，这也是从散装COFE中得知的。合金纳米线，像这里展示的那样小，可能被用于各种应用，包括高密度数据存储、成像、传感，甚至药物输送。
We show that 3 nm wide cobalt-iron alloy nanowires can be synthesized by simple wet chemical electroless deposition inside tubular Tobacco mosaic virus particles. The method is based on adsorption of Pd(II) ions, formation of a Pd catalyst, and autocatalytic deposition of the alloy from dissolved metal salts, reduced by a borane compound. Extensive energy-filtering TEM investigations at the nanoscale revealed that the synthesized wires are alloys of Co, Fe, and Ni. We confirmed by high-resolution TEM that our alloy nanowires are at least partially crystalline, which is compatible with typical Co-rich alloys. Ni traces bestow higher stability, presumably against corrosion, as also known from bulk CoFe. Alloy nanowires, as small as the ones presented here, might be used for a variety of applications including high density data storage, imaging, sensing, and even drug delivery.