Optical properties of Ni and Cu nanowire arrays and Ni/Cu superlattice nanowire arrays.
Optical properties of Ni and Cu nanowire arrays and Ni/Cu superlattice nanowire arrays.
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Ni和Cu纳米线阵列以及Ni/Cu超晶格纳米线阵列的光学性质
DOI：
10.1186/1556-276x-7-569
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发表时间：
2012-10-15
影响因子：
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通讯作者：
Hu J
中科院分区：
文献类型：
--
作者：
Zhang Y;Xu W;Xu S;Fei G;Xiao Y;Hu J
在这项研究中，Ni和Cu纳米线阵列和Ni/Cu超晶格纳米线阵列的制造使用标准技术，如电化学沉积的金属到多孔阳极氧化铝模板具有约50 nm的孔径。我们对这些纳米线阵列结构进行光学测量。使用成像光谱仪在400至2，000 nm的波长范围内记录所制备样品的光学反射率（OR）（即，从可见光到近红外带宽）。测量在设定为4.2、70、150和200 K的温度和室温下进行。我们发现，纳米线阵列的OR谱的强度强烈依赖于温度。在可见光区，所有样品在T = 200 K左右都能观察到最强的OR值.这些样品的OR光谱在可见光和近红外波段表现出不同的特征。我们讨论了导致这些有趣实验结果的物理机制。本研究对于金属纳米线阵列在光电子器件方面的应用具有重要意义。
In this study, Ni and Cu nanowire arrays and Ni/Cu superlattice nanowire arrays are fabricated using standard techniques such as electrochemical deposition of metals into porous anodic alumina oxide templates having pore diameters of about 50 nm. We perform optical measurements on these nanowire array structures. Optical reflectance (OR) of the as-prepared samples is recorded using an imaging spectrometer in the wavelength range from 400 to 2,000 nm (i.e., from visible to near-infrared bandwidth). The measurements are carried out at temperatures set to be 4.2, 70, 150, and 200 K and at room temperature. We find that the intensity of the OR spectrum for nanowire arrays depends strongly on the temperature. The strongest OR can be observed at aboutT= 200 K for all samples in visible regime. The OR spectra for these samples show different features in the visible and near-infrared bandwidths. We discuss the physical mechanisms responsible for these interesting experimental findings. This study is relevant to the application of metal nanowire arrays as optical and optoelectronic devices.