Fabrication of NiIn alloy nanotubes

NiIn合金ナノチューブの創成

北澤 真一

Kitazawa, Sin-iti

合金ナノチューブを、自己組織化により創成した。レーザー蒸着法により作製した炭素-ニッケル-インジウム混合薄膜を熱処理することにより生成した。形状は、走査型及び透過型電子顕微鏡により観察した。チューブの径は数10nmで、アスペクト比は2500程度である。熱処理の温度が合金の融点よりも少し低いために過冷却状態となることに基づいた成長モデルを構築した。

Alloy nanotubes were successfully grown by a self-organization. They were produced by an annealing of carbon - nickel - indium mixture thin films that were prepared by pulsed laser deposition. The structures were observed and analyzed by a scanning electron microscope and a transmission electron microscope. The diameters were several tens nm and the aspect ratios were more than 2500. The annealing temperature was somewhat lower than the melting point of the alloy; therefore it was a supercooled state. The growth mechanism is suggested by the driving force originated from supersaturation of alloying liquid indium with solid nickel.