Figure 2.

The spectra of optical reflection for nanowire arrays measured at different temperatures of 4.2, 70, 150, 200, and 297 K as indicated. The results for a Ni nanowire array (a), a Ni/Cu superlattice nanowire array (b), and a Cu nanowire array (c) are shown.

Zhang et al. Nanoscale Research Letters 2012 7:569   doi:10.1186/1556-276X-7-569
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