Surface-enhanced Raman scattering of pyridine adsorbed on some metal nanowire arrays

Nanowire arrays of various metals were fabricated from the template of poro us alumina, We observed the strong surface-enhanced Raman scattering(SERS) signals of the adsorbed molecules such as pyridine not only at the noble me tals nanowires that exhibit a high SERS activity, but also at Ni, Co nanowi res that are normally considered to be non-SERS active substrates. The inte nsity of the species adsorbed at Ni nanowires is stronger than that on the conventionally roughened metal surface, and depends on the length of the na nowires out of alumina matrix. The metal nanowire arrays can be used as SER S active substrates.