超低噪声hcp晶格金属纳米线的电化学制备
Electrochemical fabrication of ultralow noise metallic nanowires with hcp crystalline lattice
摘要：
我们的实验表明，当纳米线的晶体结构是六方密堆积（hcp）而不是面心立方（fcc）时，银纳米线的低频电噪声被严重抑制。利用低电位电化学方法，我们生长出具有六方晶系结构的单晶银纳米线，其室温下的噪声比相同直径的传统面心立方纳米线低2到6个数量级。我们认为，位错的运动可能是金属纳米线的电噪声的主要来源，这是强烈的hcp晶体中减少。
英文摘要：
We experimentally demonstrate that low-frequency electrical noise in silver nanowires is heavily suppressed when the crystal structure of the nanowires is hexagonal closed pack (hcp) rather than face centered cubic (fcc). Using a low-potential electrochemical method we have grown single crystalline silver nanowires with hcp crystal structure, in which the noise at room temperature is two to six orders of magnitude lower than that in the conventional fcc nanowires of the same diameter. We suggest that motion of dislocations is probably the primary source of electrical noise in metallic nanowires, which is strongly diminished in hcp crystals.
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